51 relations: Absolute magnitude, Albedo, Apparent magnitude, Asteroid, Astronomical unit, Aten asteroid, Atira asteroid, David J. Tholen, Degree (angle), E-type asteroid, Earth, Ecliptic, Geneva Observatory, Horseshoe orbit, Hour, Jet Propulsion Laboratory, Julian day, Julian year (astronomy), Light curve, Lincoln Near-Earth Asteroid Research, List of asteroid close approaches to Earth in 2015, List of Earth-crossing minor planets, List of Mercury-crossing minor planets, List of minor planet discoverers, List of named minor planets (alphabetical), List of Venus-crossing minor planets, Lunar distance (astronomy), Magnitude (astronomy), Mercury (planet), Minor planet, Minor Planet Center, Minor planet designation, MIT Lincoln Laboratory, Moon, NASA, Near-Earth object, Orbital eccentricity, Orbital inclination, Perihelion and aphelion, Perturbation (astronomy), Potentially hazardous object, Rotation period, S-type asteroid, Semi-major and semi-minor axes, Sun, Trojan (astronomy), Venus, (99907) 1989 VA, 163693 Atira, 1993 DA, ..., 4179 Toutatis. Expand index (1 more) »
Absolute magnitude
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
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Albedo
Albedo (albedo, meaning "whiteness") is the measure of the diffuse reflection of solar radiation out of the total solar radiation received by an astronomical body (e.g. a planet like Earth).
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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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Asteroid
Asteroids are minor planets, especially those of the inner Solar System.
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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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Aten asteroid
The Aten asteroids are a dynamical group of asteroids whose orbits bring them into proximity with Earth.
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Atira asteroid
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).
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David J. Tholen
David James Tholen (born 1955) is an American astronomer at the Institute for Astronomy of the University of Hawaii.
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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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E-type asteroid
E-type asteroids are asteroids thought to have enstatite (MgSiO3) achondrite surfaces.
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Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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Ecliptic
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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Geneva Observatory
The Geneva Observatory (Observatoire de Genève, Observatorium von Genf) is an astronomical observatory at Sauverny (CH) in the municipality of Versoix, Canton of Geneva, in Switzerland.
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Horseshoe orbit
A horseshoe orbit is a type of co-orbital motion of a small orbiting body relative to a larger orbiting body (such as Earth).
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Hour
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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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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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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Julian year (astronomy)
In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of SI seconds each.
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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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Lincoln Near-Earth Asteroid Research
The Lincoln Near-Earth Asteroid Research (LINEAR) project is a collaboration of the United States Air Force, NASA, and the MIT's Lincoln Laboratory for the systematic detection and tracking of near-Earth objects.
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List of asteroid close approaches to Earth in 2015
Below is the list of asteroid close approaches to Earth in 2015.
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List of Earth-crossing minor planets
An Earth-crosser is a near-Earth asteroid whose orbit crosses that of Earth as observed from the ecliptic pole of Earth's orbit.
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List of Mercury-crossing minor planets
A Mercury crosser is an asteroid whose orbit crosses that of Mercury.
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List of minor planet discoverers
This is a list of all astronomers who are credited by the Minor Planet Center (MPC) with the discovery of one or several minor planets.
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List of named minor planets (alphabetical)
This is a list of named minor planets in an alphabetical, case-insensitive order.
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List of Venus-crossing minor planets
A Venus-crosser is an asteroid whose orbit crosses that of Venus.
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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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Magnitude (astronomy)
In astronomy, magnitude is a logarithmic measure of the brightness of an object in a defined passband, often in the visible or infrared spectrum, but sometimes across all wavelengths.
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Mercury (planet)
Mercury is the smallest and innermost planet in the Solar System.
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Minor planet
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.
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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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Minor planet designation
A formal minor planet designation is, in its final form, a number–name combination given to a minor planet (asteroid, centaur, trans-Neptunian object and dwarf planet but not comet).
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MIT Lincoln Laboratory
The MIT Lincoln Laboratory, located in Lexington, Massachusetts, is a United States Department of Defense research and development center chartered to apply advanced technology to problems of national security.
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Moon
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
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NASA
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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Near-Earth object
A near-Earth object (NEO) is any small Solar System body whose orbit can bring it into proximity with Earth.
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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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Orbital inclination
Orbital inclination measures the tilt of an object's orbit around a celestial body.
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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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Perturbation (astronomy)
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.
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Potentially hazardous object
A potentially hazardous object (PHO) is a near-Earth object – either an asteroid or a comet – with an orbit that can make exceptionally close approaches to the Earth and large enough to cause significant regional damage in the event of impact.
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Rotation period
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.
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S-type asteroid
S-type asteroids are asteroids with a spectral type that is indicative of a silicaceous (i.e. stony) mineralogical composition, hence the name.
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Semi-major and semi-minor axes
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.
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Sun
The Sun is the star at the center of the Solar System.
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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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Venus
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days.
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(99907) 1989 VA
is a very eccentric, stony asteroid and near-Earth object, approximately 1 kilometer in diameter.
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163693 Atira
163693 Atira, provisional designation, is a stony asteroid, dwelling in the interior of Earth's orbit.
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1993 DA
is a sub-kilometer asteroid, classified as a near-Earth object of the Aten group.
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4179 Toutatis
4179 Toutatis, provisional designation, is an elongated, stony asteroid and slow rotator, classified as near-Earth object and potentially hazardous asteroid of the Apollo and Alinda group, approximately 2.5 kilometers in diameter.
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References
[1] https://en.wikipedia.org/wiki/(33342)_1998_WT24