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ʻOumuamua is a mildly active comet, and the first known interstellar object to pass through the Solar System. [1]

129 relations: A/2017 U7, Allen Telescope Array, American Astronomical Society, Apostrophe, Apparent magnitude, Arthur C. Clarke, Asteroid, Asteroid spectral types, Astronomical unit, Astronomy, Avi Loeb, BBC, Breakthrough Listen, Breakthrough Starshot, C/1980 E1 (Bowell), C/2010 X1 (Elenin), C/2018 C2 (Lemmon), Canada–France–Hawaii Telescope, Catalina Sky Survey, Central Bureau for Astronomical Telegrams, Chris Lintott, Coma (cometary), Comet, Comet ISON, Comet tail, Contact binary (small Solar System body), Cosmic ray, D-type asteroid, Damocloid, David C. Jewitt, Declination, Degree (angle), Disrupted planet, Ecliptic, Escape velocity, European Southern Observatory, Extrasolar object, Extraterrestrial intelligence, ʻOkina, Frost line (astrophysics), Gaia (spacecraft), Gemini Observatory, Geometric albedo, Glottal stop, Green Bank Telescope, Haleakala Observatory, Halley's Comet, Harvard University, Hawaiian language, Hour, ..., Hubble Space Telescope, Hyperbolic asteroid, Hyperbolic trajectory, Initiative for Interstellar Studies, International Astronomical Union, Interstellar object, Jet Propulsion Laboratory, JPL Horizons On-Line Ephemeris System, JPL Small-Body Database, Julian day, Jupiter, Karen Jean Meech, Kepler's laws of planetary motion, Kuiper belt, Larry Kimura, Light curve, List of Facebook features, List of nearest stars and brown dwarfs, List of tumblers (small Solar System bodies), Local standard of rest, Lunar distance (astronomy), Lyra, Mercury (planet), Meteoroid, Minor Planet Center, Monthly Notices of the Royal Astronomical Society, NASA, Nature (journal), NBC News, Oberth effect, Observation arc, Oort cloud, Orbital eccentricity, Organic compound, Pan-STARRS, PDF, Pegasus (constellation), Perihelion and aphelion, Poinsot's ellipsoid, Precovery, Project Lyra, Proper motion, Quotation mark, Radio telescope, Radio wave, Red dwarf, Reduplication, Rendezvous with Rama, Right ascension, Robert Weryk, Scientific American, SETI Institute, Sextans, Shift-and-add, Solar apex, Solar System, Spaceguard, Specific orbital energy, Spitzer Space Telescope, Star system, Stellar age estimation, STEREO, Sublimation (phase transition), The New York Times, The New Zealand Herald, Tholin, Trojan (astronomy), Universe Today, University of Hawaii at Hilo, Vega, Very Large Telescope, Volatiles, W. M. Keck Observatory, West Virginia, William Herschel Telescope, (514107) 2015 BZ509, 1865 Cerberus, 2062 Aten, 90377 Sedna. Expand index (79 more) »

A/2017 U7

A/2017 U7 is a hyperbolic asteroid, first observed on 29 October 2017 by astronomers of the Pan-STARRS facility at Haleakala Observatory, Hawaii, United States when the object was from the Sun.

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Allen Telescope Array

The Allen Telescope Array (ATA), formerly known as the One Hectare Telescope (1hT), is a radio telescope array dedicated to astronomical observations and a simultaneous search for extraterrestrial intelligence (SETI).

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American Astronomical Society

The American Astronomical Society (AAS, sometimes spoken as "double-A-S") is an American society of professional astronomers and other interested individuals, headquartered in Washington, DC.

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The apostrophe ( ' or) character is a punctuation mark, and sometimes a diacritical mark, in languages that use the Latin alphabet and some other alphabets.

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Apparent magnitude

The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.

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Arthur C. Clarke

Sir Arthur Charles Clarke (16 December 1917 – 19 March 2008) was a British science fiction writer, science writer and futurist, inventor, undersea explorer, and television series host.

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Asteroids are minor planets, especially those of the inner Solar System.

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Asteroid spectral types

An asteroid spectral type is assigned to asteroids based on their emission spectrum, color, and sometimes albedo (reflectivity).

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Astronomical unit

The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.

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Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

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Avi Loeb

Abraham (Avi) Loeb is an Israeli American theoretical physicist who works on astrophysics and cosmology.

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The British Broadcasting Corporation (BBC) is a British public service broadcaster.

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Breakthrough Listen

Breakthrough Listen is a science-based program to search for intelligent extraterrestrial communications in the Universe.

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Breakthrough Starshot

Breakthrough Starshot is a research and engineering project by the Breakthrough Initiatives to develop a proof-of-concept fleet of light sail spacecraft named StarChip, to be capable of making the journey to the Alpha Centauri star system 4.37 light-years away.

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C/1980 E1 (Bowell)

C/1980 E1 is a non-periodic comet discovered by Edward L. G. Bowell on 11 February 1980.

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C/2010 X1 (Elenin)

Comet C/2010 X1 (Elenin) is an Oort cloud comet discovered by Russian amateur astronomer Leonid Elenin on December 10, 2010, through remote control of the International Scientific Optical Network's robotic observatory near Mayhill in the U.S. state of New Mexico.

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C/2018 C2 (Lemmon)

C/2018 C2 (Lemmon) is a hyperbolic comet (previously classified as A/2018 C2, a hyperbolic asteroid).

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Canada–France–Hawaii Telescope

The Canada–France–Hawaii Telescope (CFHT) is located near the summit of Mauna Kea mountain on Hawaii's Big Island at an altitude of 4,204 meters (13,793 feet), and is one of the observatories that comprise the Mauna Kea Observatories.

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Catalina Sky Survey

Catalina Sky Survey (CSS; obs. code: 703) is an astronomical survey to discover comets and asteroids.

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Central Bureau for Astronomical Telegrams

The Central Bureau for Astronomical Telegrams (CBAT) is the official international clearing house for information relating to transient astronomical events.

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Chris Lintott

Christopher John Lintott (born 26 November 1980) is a Professor of Astrophysics in the Department of Physics at the University of Oxford.

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Coma (cometary)

The coma is the nebulous envelope around the nucleus of a comet, formed when the comet passes close to the Sun on its highly elliptical orbit; as the comet warms, parts of it sublime.

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A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing.

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Comet ISON

Comet ISON, formally known as C/2012 S1, was a sungrazing comet discovered on 21 September 2012 by Vitaly Nevsky (Виталий Невский, Vitebsk, Belarus) and Artyom Novichonok (Артём Новичонок, Kondopoga, Russia).

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Comet tail

A comet tail—and coma—are features visible in comets when they are illuminated by the Sun and may become visible from Earth when a comet passes through the inner Solar System.

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Contact binary (small Solar System body)

A contact binary is a small Solar System body that is composed of two bodies that have gravitated toward each other until they touch.

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Cosmic ray

Cosmic rays are high-energy radiation, mainly originating outside the Solar System and even from distant galaxies.

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D-type asteroid

D-type asteroids have a very low albedo and a featureless reddish spectrum.

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Damocloids are a class of minor planets such as 5335 Damocles and 1996 PW that have Halley-family or long-period highly eccentric orbits typical of periodic comets such as Halley's Comet, but without showing a cometary coma or tail.

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David C. Jewitt

David C. Jewitt (born 1958) is an English astronomer and professor of astronomy at UCLA's Earth, Planetary, and Space Science Department in California.

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In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.

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Degree (angle)

A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.

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Disrupted planet

A disrupted planet is an official astronomical term for a planet, or exoplanet, that has been disrupted, or destroyed, by a nearby, or passing, astronomical body or object, such as a star.

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The ecliptic is the circular path on the celestial sphere that the Sun follows over the course of a year; it is the basis of the ecliptic coordinate system.

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Escape velocity

In physics, escape velocity is the minimum speed needed for an object to escape from the gravitational influence of a massive body.

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European Southern Observatory

The European Southern Observatory (ESO) is a 15-nation intergovernmental research organization for ground-based astronomy.

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Extrasolar object

An extrasolar object is an astronomical object that exists outside the Solar System.

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Extraterrestrial intelligence

Extraterrestrial intelligence (often abbreviated ETI) refers to hypothetical intelligent extraterrestrial life.

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The okina, also called by several other names, is a unicameral consonant letter used within the Latin script to mark the phonemic glottal stop, as it is used in many Polynesian languages.

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Frost line (astrophysics)

In astronomy or planetary science, the frost line, also known as the snow line or ice line, is the particular distance in the solar nebula from the central protostar where it is cold enough for volatile compounds such as water, ammonia, methane, carbon dioxide, carbon monoxide to condense into solid ice grains.

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Gaia (spacecraft)

Gaia is a space observatory of the European Space Agency (ESA) designed for astrometry: measuring the positions and distances of stars with unprecedented precision.

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Gemini Observatory

The Gemini Observatory is an astronomical observatory consisting of two 8.19-metre (26.9 ft) telescopes, Gemini North and Gemini South, which are located at two separate sites in Hawaii and Chile, respectively.

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Geometric albedo

In astronomy, the geometric albedo of a celestial body is the ratio of its actual brightness as seen from the light source (i.e. at zero phase angle) to that of an idealized flat, fully reflecting, diffusively scattering (Lambertian) disk with the same cross-section.

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Glottal stop

The glottal stop is a type of consonantal sound used in many spoken languages, produced by obstructing airflow in the vocal tract or, more precisely, the glottis.

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Green Bank Telescope

The Robert C. Byrd Green Bank Telescope (GBT) in Green Bank, West Virginia, US is the world's largest fully steerable radio telescope.

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Haleakala Observatory

The Haleakalā Observatory, also known as the Haleakalā High Altitude Observatory Site, is Hawaii's first astronomical research observatory.

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Halley's Comet

Halley's Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 74–79 years.

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Harvard University

Harvard University is a private Ivy League research university in Cambridge, Massachusetts.

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Hawaiian language

The Hawaiian language (Hawaiian: Ōlelo Hawaii) is a Polynesian language that takes its name from Hawaiokinai, the largest island in the tropical North Pacific archipelago where it developed.

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An hour (symbol: h; also abbreviated hr.) is a unit of time conventionally reckoned as of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions.

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Hubble Space Telescope

The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.

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Hyperbolic asteroid

A hyperbolic asteroid is any sort of asteroid or non-cometary astronomical object observed to have an orbit not bound to the Sun and will have an orbital eccentricity greater than 1 when near perihelion.

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Hyperbolic trajectory

In astrodynamics or celestial mechanics, a hyperbolic trajectory is the trajectory of any object around a central body with more than enough speed to escape the central object's gravitational pull.

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Initiative for Interstellar Studies

The Initiative for Interstellar Studies (i4is) is a nonprofit organization, whose objectives are education and research into the challenges of Interstellar Travel.

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International Astronomical Union

The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.

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Interstellar object

An interstellar object is a body other than a star or substar located in interstellar space, and not gravitationally bound to a star.

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Jet Propulsion Laboratory

The Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center in Pasadena, California, United States, with large portions of the campus in La Cañada Flintridge, California.

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JPL Horizons On-Line Ephemeris System

JPL Horizons On-Line Ephemeris System provides easy access to key Solar System data and flexible production of highly accurate ephemerides for Solar System objects.

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JPL Small-Body Database

The JPL Small-Body Database (SBDB) is an astronomy database about small Solar System bodies.

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Julian day

Julian day is the continuous count of days since the beginning of the Julian Period and is used primarily by astronomers.

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Jupiter is the fifth planet from the Sun and the largest in the Solar System.

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Karen Jean Meech

Karen J. Meech (born 1959) is an American astronomer at the Institute for Astronomy in the University of Hawaii.

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Kepler's laws of planetary motion

In astronomy, Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun.

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Kuiper belt

The Kuiper belt, occasionally called the Edgeworth–Kuiper belt, is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun.

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Larry Kimura

Larry Kimura is a professor of the Hawaiian language and Hawaiian studies at the University of Hawaii, Hilo in the Ka Haka ‘Ula O Ke‘elikōlani, College of Hawaiian Language.

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Light curve

In astronomy, a light curve is a graph of light intensity of a celestial object or region, as a function of time.

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List of Facebook features

Facebook is a social network service website launched on February 4, 2004.

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List of nearest stars and brown dwarfs

The following two lists include all the known stars and brown dwarfs that are within of the Sun, or were/will be within in the astronomically near past or future.

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List of tumblers (small Solar System bodies)

This is a list of tumblers, minor planets, comets and natural satellites that rotate on a non-principal axis, commonly known as "tumbling" or "wobbling".

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Local standard of rest

In astronomy, the local standard of rest or LSR follows the mean motion of material in the Milky Way in the neighborhood of the Sun.

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Lunar distance (astronomy)

Lunar distance (LD or \Delta_), also called Earth–Moon distance, Earth–Moon characteristic distance, or distance to the Moon, is a unit of measure in astronomy.

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Lyra (Latin for lyre, from Greek λύρα) is a small constellation.

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Mercury (planet)

Mercury is the smallest and innermost planet in the Solar System.

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A meteoroid is a small rocky or metallic body in outer space.

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Minor Planet Center

The Minor Planet Center (MPC) is the official worldwide organization in charge of collecting observational data for minor planets (such as asteroids and comets), calculating their orbits and publishing this information via the Minor Planet Circulars.

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Monthly Notices of the Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.

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The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.

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Nature (journal)

Nature is a British multidisciplinary scientific journal, first published on 4 November 1869.

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NBC News

NBC News is the news division of the American broadcast television network NBC, formerly known as the National Broadcasting Company when it was founded on radio.

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Oberth effect

In astronautics, a powered flyby, or Oberth maneuver, is a maneuver in which a spacecraft falls into a gravitational well, and then accelerates when its fall reaches maximum speed.

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Observation arc

In observational astronomy, an observation arc (or arc length) is the time period between the first and most recent (last) observation, tracing the body's path.

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Oort cloud

The Oort cloud, named after the Dutch astronomer Jan Oort, sometimes called the Öpik–Oort cloud, is a theoretical cloud of predominantly icy planetesimals proposed to surround the Sun at distances ranging from.

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Orbital eccentricity

The orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle.

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Organic compound

In chemistry, an organic compound is generally any chemical compound that contains carbon.

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The Panoramic Survey Telescope and Rapid Response System (Pan-STARRS 1; obs. code: F51 and Pan-STARRS 2 obs. code: F52) located at Haleakala Observatory, Hawaii, USA, consists of astronomical cameras, telescopes and a computing facility that is surveying the sky for moving or variable objects on a continual basis, and also producing accurate astrometry and photometry of already detected objects.

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The Portable Document Format (PDF) is a file format developed in the 1990s to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.

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Pegasus (constellation)

Pegasus is a constellation in the northern sky, named after the winged horse Pegasus in Greek mythology.

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Perihelion and aphelion

The perihelion of any orbit of a celestial body about the Sun is the point where the body comes nearest to the Sun.

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Poinsot's ellipsoid

In classical mechanics, Poinsot's construction (after Louis Poinsot) is a geometrical method for visualizing the torque-free motion of a rotating rigid body, that is, the motion of a rigid body on which no external forces are acting.

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In astronomy, precovery (short for pre-discovery recovery) is the process of finding the image of an object in old archived images or photographic plates for the purpose of calculating a more accurate orbit.

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Project Lyra

Project Lyra is a feasibility study of a mission to the interstellar object ʻOumuamua, initiated on the by the Initiative for Interstellar Studies (i4is).

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Proper motion

Proper motion is the astronomical measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the Solar System, compared to the abstract background of the more distant stars.

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Quotation mark

Quotation marks, also called quotes, quote marks, quotemarks, speech marks, inverted commas or talking marks, are punctuation marks used in pairs in various writing systems to set off direct speech, a quotation, or a phrase.

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Radio telescope

A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy.

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Radio wave

Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light.

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Red dwarf

A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.

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Reduplication in linguistics is a morphological process in which the root or stem of a word (or part of it) or even the whole word is repeated exactly or with a slight change.

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Rendezvous with Rama

Rendezvous with Rama is a science fiction novel by British writer Arthur C. Clarke first published in 1973.

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Right ascension

Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.

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Robert Weryk

Robert J. Weryk (born 1981) is currently an astronomer at the University of Hawaii at Manoa where he discovered the first known interstellar object, 'Oumuamua.

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Scientific American

Scientific American (informally abbreviated SciAm) is an American popular science magazine.

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SETI Institute

The SETI Institute is a not-for-profit research organization whose mission is to explore, understand, and explain the origin and nature of life in the universe, and to apply the knowledge gained to inspire and guide present and future generations.

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Sextans is a minor equatorial constellation which was introduced in 1687 by Johannes Hevelius.

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The shift-and-add method (more recently "image-stacking" method) is a form of speckle imaging commonly used for obtaining high quality images from a number of short exposures with varying image shifts.

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Solar apex

The solar apex, or the Apex of the Sun's Way, refers to the direction that the Sun travels with respect to the Local Standard of Rest.

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Solar System

The Solar SystemCapitalization of the name varies.

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The term Spaceguard loosely refers to a number of efforts to discover and study near-Earth objects (NEO), especially those that may impact Earth.

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Specific orbital energy

In the gravitational two-body problem, the specific orbital energy \epsilon\,\! (or vis-viva energy) of two orbiting bodies is the constant sum of their mutual potential energy (\epsilon_p\,\!) and their total kinetic energy (\epsilon_k\,\!), divided by the reduced mass.

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Spitzer Space Telescope

The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space telescope launched in 2003 and still operating as of 2018.

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Star system

A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction.

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Stellar age estimation

Various methods and tools are involved in stellar age estimation, an attempt to identify within reasonable degrees of confidence what the age of a star is.

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STEREO (Solar Terrestrial Relations Observatory) is a solar observation mission.

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Sublimation (phase transition)

Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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The New York Times

The New York Times (sometimes abbreviated as The NYT or The Times) is an American newspaper based in New York City with worldwide influence and readership.

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The New Zealand Herald

The New Zealand Herald is a daily newspaper published in Auckland, New Zealand, owned by New Zealand Media and Entertainment.

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Tholins (after the Greek θολός (tholós) "hazy" or "muddy"; from the ancient Greek word meaning "sepia ink") are a wide variety of organic compounds formed by solar ultraviolet irradiation or cosmic rays from simple carbon-containing compounds such as carbon dioxide, methane or ethane, often in combination with nitrogen.

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Trojan (astronomy)

In astronomy, a trojan is a minor planet or moon that shares the orbit of a planet or larger moon, wherein the trojan remains in the same, stable position relative to the larger object.

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Universe Today

Universe Today (UT) is a popular North American-based non-commercial space and astronomy news website.

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University of Hawaii at Hilo

The University of Hawaii at Hilo or UH Hilo is a public co-educational university in Hilo, Hawaiokinai, United States.

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Vega, also designated Alpha Lyrae (α Lyrae, abbreviated Alpha Lyr or α Lyr), is the brightest star in the constellation of Lyra, the fifth-brightest star in the night sky, and the second-brightest star in the northern celestial hemisphere, after Arcturus.

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Very Large Telescope

The Very Large Telescope (VLT) is a telescope facility operated by the European Southern Observatory on Cerro Paranal in the Atacama Desert of northern Chile.

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In planetary science, volatiles are the group of chemical elements and chemical compounds with low boiling points that are associated with a planet's or moon's crust or atmosphere.

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W. M. Keck Observatory

The W. M. Keck Observatory is a two-telescope astronomical observatory at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii.

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West Virginia

West Virginia is a state located in the Appalachian region of the Southern United States.

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William Herschel Telescope

The William Herschel Telescope (WHT) is a optical/near-infrared reflecting telescope located at the Observatorio del Roque de los Muchachos on the island of La Palma in the Canary Islands, Spain.

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(514107) 2015 BZ509

, provisional designation, also called Bee-Zed, is a small asteroid, approximately in diameter, in a resonant, co-orbital motion with Jupiter.

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1865 Cerberus

1865 Cerberus, provisional designation, is a stony asteroid and near-Earth object of the Apollo group, approximately 1.6 kilometers in diameter.

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2062 Aten

2062 Aten, provisional designation, is a stony sub-kilometer asteroid and namesake of the Aten asteroids, a subgroup of near-Earth objects.

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90377 Sedna

90377 Sedna is a large minor planet in the outer reaches of the Solar System that was,, at a distance of about 86 astronomical units (AU) from the Sun, about three times as far as Neptune.

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'Oumuamua, 1I 'Oumuamua, 1I (asteroid), 1I (comet), 1I (small solar system body), 1I Oumuamua, 1I/ 'Oumuamua, 1I/'Oumuamua, 1I/2017 U1, 1I/2017 U1 ('Oumuamua), 1I/2017 U1 (ʻOumuamua), 1I/Oumuamua, 1I/ʻOumuamua, 2017 U1, ?Oumuamua, A/'Oumuamua, A/2017 U1, A/Oumuamua, Asteroid 'Oumuamua, Asteroid 1I/2017 U1, Asteroid Oumuamua, C/'Oumuamua, C/2017 U1, C/2017 U1 (PANSTARRS), C/Oumuamua, Comet 'Oumuamua, Comet Oumuamua, I/'Oumuamua, I/2017 U1, I/Oumuamua, Oumuamua, ‘Oumuamua.


[1] https://en.wikipedia.org/wiki/ʻOumuamua

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