77 relations: Air burst, Amateur astronomy, Apollo asteroid, Apparent magnitude, Apsis, Argument of periapsis, Asteroid, Astronomical Observatory of Mallorca, Astronomical unit, Aten asteroid, Atira asteroid, Calar Alto Observatory, Castle Bravo, Chelyabinsk meteor, Culture of the Philippines, Curve fitting, Degree (angle), DF-4, Don Quijote (spacecraft), Duende, Earth radius, Epoch (astronomy), Fairy, Galileo National Telescope, Geometric mean, Geosynchronous orbit, Goblin, Goldstone Deep Space Communications Complex, Gran Telescopio Canarias, Hour, Iberian Peninsula, Ivy Mike, Jaume Nomen, Jet Propulsion Laboratory, JPL Horizons On-Line Ephemeris System, Julian day, Julian year (astronomy), Kinetic energy, L-type asteroid, La Sagra Observatory, Las Campanas Observatory, Light curve, List of asteroid close approaches to Earth, Longitude of the ascending node, Lunar distance (astronomy), Mean anomaly, Metre, Minor planet, Minor Planet Center, Naked eye, ..., Near-Earth object, Orbital eccentricity, Orbital inclination, Orbital period, Perturbation (astronomy), Phil Plait, Province of Granada, R-12 Dvina, Radar astronomy, Reflecting telescope, Rotation period, S-type asteroid, Sandia National Laboratories, Scientific American, Semi-major and semi-minor axes, Sentry (monitoring system), Sierra Nevada Observatory, TNT equivalent, Tunguska event, Uncertainty parameter, Universal Time, V-type asteroid, W88, (29075) 1950 DA, 2011 MD, 2013 PDC-E, 99942 Apophis. Expand index (27 more) » « Shrink index
An air burst is the detonation of an explosive device such as an anti-personnel artillery shell or a nuclear weapon in the air instead of on contact with the ground or target or a delayed armor-piercing explosion.
Amateur astronomy is a hobby whose participants enjoy observing or imaging celestial objects in the sky using the unaided eye, binoculars, or telescopes.
The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
An apsis (ἁψίς; plural apsides, Greek: ἁψῖδες) is an extreme point in the orbit of an object.
The argument of periapsis (also called argument of perifocus or argument of pericenter), symbolized as ω, is one of the orbital elements of an orbiting body.
Asteroids are minor planets, especially those of the inner Solar System.
The Astronomical Observatory of Mallorca (Observatorio Astronómico de Mallorca, OAM) is an observatory just south of Costitx, Mallorca, Spain.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
The Aten asteroids are a dynamical group of asteroids whose orbits bring them into proximity with Earth.
Atira asteroids or Apohele asteroids, also known as Interior-Earth Objects (IEOs), are asteroids, whose orbits are entirely confined within Earth's orbit, that is, their orbit has an aphelion (farthest point from the Sun) smaller than Earth's perihelion (nearest point to the Sun), which is 0.983 astronomical units (AU).
The Calar Alto Observatory (Centro Astronómico Hispano-Alemán or Deutsch-Spanisches Astronomisches Zentrum, respectively "Spanish–German Astronomical Centre" and "German–Spanish Astronomical Centre") is an astronomical observatory located in Almería province in Spain on Calar Alto, a mountain in the Sierra de Los Filabres range.
Castle Bravo was the first in a series of high-yield thermonuclear weapon design tests conducted by the United States at Bikini Atoll, Marshall Islands, as part of Operation Castle.
The Chelyabinsk meteor was a superbolide caused by an approximately 20-metre near-Earth asteroid that entered Earth's atmosphere over Russia on 15 February 2013 at about 09:20 YEKT (03:20 UTC), with a speed of 19.16 ± 0.15 kilometres per second (60,000–69,000 km/h or 40,000–42,900 mph).
The culture of the Philippines is a combination of cultures of the East and West.
Curve fitting is the process of constructing a curve, or mathematical function, that has the best fit to a series of data points, possibly subject to constraints.
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.
The Dong Feng 4 or DF-4 (also known as the CSS-3) is a two-stage Chinese Intercontinental ballistic missile with liquid fuel (Nitric acid/Unsymmetrical dimethylhydrazine).
Don Quijote is a past space probe concept that has been studied by the European Space Agency, and which would investigate the effects of crashing a spacecraft into an asteroid.
A duende is a creature from Iberian, Latin American, and Filipino folklore.
Earth radius is the approximate distance from Earth's center to its surface, about.
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.
A fairy (also fata, fay, fey, fae, fair folk; from faery, faerie, "realm of the fays") is a type of mythical being or legendary creature in European folklore, a form of spirit, often described as metaphysical, supernatural, or preternatural.
The Galileo National Telescope, (Telescopio Nazionale Galileo; TNG; code: Z19) is a 3.58-meter Italian telescope, located at the Roque de los Muchachos Observatory on the island of La Palma in the Canary Islands, Spain.
In mathematics, the geometric mean is a mean or average, which indicates the central tendency or typical value of a set of numbers by using the product of their values (as opposed to the arithmetic mean which uses their sum).
A geosynchronous orbit (sometimes abbreviated GSO) is an orbit around Earth of a satellite with an orbital period that matches Earth's rotation on its axis, which takes one sidereal day (23 hours, 56 minutes, and 4 seconds).
A goblin is a monstrous creature from European folklore, first attested in stories from the Middle Ages.
The Goldstone Deep Space Communications Complex (GDSCC), commonly called the Goldstone Observatory, is located in the Mojave Desert near Barstow in the U.S. state of California.
The Gran Telescopio Canarias (GranTeCan or GTC) is a reflecting telescope located at the Roque de los Muchachos Observatory on the island of La Palma, in the Canaries, Spain.
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.
The Iberian Peninsula, also known as Iberia, is located in the southwest corner of Europe.
Ivy Mike was the codename given to the first test of a full-scale thermonuclear device, in which part of the explosive yield comes from nuclear fusion.
Jaume Nomen Torres (also: Jaime Nomen; born June 23, 1960 in Tortosa, Catalonia) is a Spanish oral and maxillofacial surgeon, amateur astronomer and discoverer of numerous minor planets.
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.
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.
Julian day is the continuous count of days since the beginning of the Julian Period and is used primarily by astronomers.
In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of SI seconds each.
In physics, the kinetic energy of an object is the energy that it possesses due to its motion.
L-type asteroids are relatively uncommon asteroids with a strongly reddish spectrum shortwards of 0.75 μm, and a featureless flat spectrum longwards of this.
La Sagra Observatory (Observatorio Astronómico de La Sagra; OLS; observatory code: J75) is an astronomical observatory located in the province of Granada, Spain.
Las Campanas Observatory (LCO) is an astronomical observatory owned and operated by the Carnegie Institution for Science (CIS).
In astronomy, a light curve is a graph of light intensity of a celestial object or region, as a function of time.
This is a list of examples where an asteroid or meteoroid travels close to the Earth.
The longitude of the ascending node (☊ or Ω) is one of the orbital elements used to specify the orbit of an object in space.
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.
In celestial mechanics, the mean anomaly is an angle used in calculating the position of a body in an elliptical orbit in the classical two-body problem.
The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in some metric systems, including the International System of Units (SI).
A minor planet is an astronomical object in direct orbit around the Sun (or more broadly, any star with a planetary system) that is neither a planet nor exclusively classified as a comet.
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.
Naked eye, also called bare eye or unaided eye, is the practice of engaging in visual perception unaided by a magnifying or light-collecting optical instrument, such as a telescope or microscope.
A near-Earth object (NEO) is any small Solar System body whose orbit can bring it into proximity with Earth.
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.
Orbital inclination measures the tilt of an object's orbit around a celestial body.
The orbital period is the time a given astronomical object takes to complete one orbit around another object, and applies in astronomy usually to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.
In astronomy, perturbation is the complex motion of a massive body subject to forces other than the gravitational attraction of a single other massive body.
Philip Cary Plait (born September 30, 1964), also known as The Bad Astronomer, is an American astronomer, skeptic, writer and popular science blogger.
Granada is a province of southern Spain, in the eastern part of the autonomous community of Andalusia.
The R-12 was a theatre ballistic missile developed and deployed by the Soviet Union during the Cold War.
Radar astronomy is a technique of observing nearby astronomical objects by reflecting microwaves off target objects and analyzing the reflections.
A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image.
In astronomy, the rotation period of a celestial object is the time that it takes to complete one revolution around its axis of rotation relative to the background stars.
S-type asteroids are asteroids with a spectral type that is indicative of a silicaceous (i.e. stony) mineralogical composition, hence the name.
The Sandia National Laboratories (SNL), managed and operated by the National Technology and Engineering Solutions of Sandia (a wholly owned subsidiary of Honeywell International), is one of three National Nuclear Security Administration research and development laboratories.
Scientific American (informally abbreviated SciAm) is an American popular science magazine.
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the widest points of the perimeter.
Since 2002, Sentry has been a highly automated collision monitoring system that continually scans the most current asteroid catalog for possibilities of future impact with Earth over the next 100+ years.
The Sierra Nevada Observatory (Observatorio de Sierra Nevada; OSN; code: J86) is located at Loma de Dilar (2896 m altitude) in the Sierra Nevada mountain range, in the province of Granada, Spain; established in 1981.
TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion.
The Tunguska event was a large explosion that occurred near the Stony Tunguska River in Yeniseysk Governorate (now Krasnoyarsk Krai), Russia, on the morning of 30 June 1908 (NS).
The uncertainty parameter U is a parameter introduced by the Minor Planet Center (MPC) to quantify concisely the uncertainty of a perturbed orbital solution for a minor planet.
Universal Time (UT) is a time standard based on Earth's rotation.
A V-type asteroid or Vestoid is an asteroid whose spectral type is that of 4 Vesta.
The W88 is a United States thermonuclear warhead, with an estimated yield of 475 kilotons (kt), and is small enough to fit on MIRVed missiles.
is an asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately in diameter.
2011 MD is a bright micro-asteroid, classified as near-Earth object of the Apollo and Amor group, respectively.
2013 PDC-E is a fictitious near earth object developed by Don Yeomans and others as the target of a table top emergency response drill at the International Academy of Astronautics.
99942 Apophis (previously known by its provisional designation) is a near-Earth asteroid that caused a brief period of concern in December 2004 because initial observations indicated a probability of up to 2.7% that it would hit Earth on April 13, 2029.