44 relations: Absolute magnitude, Albedo, Amor asteroid, Apparent magnitude, Arecibo Observatory, Asteroid, Astronomer, Astronomical unit, Astrophysics, Binary asteroid, C-type asteroid, Comet, Degree (angle), Earth, Ecliptic, Goldstone Deep Space Communications Complex, Hour, Jet Propulsion Laboratory, Julian day, Julian year (astronomy), Jupiter, Lincoln Near-Earth Asteroid Research, List of Mars-crossing minor planets, Lunar distance (astronomy), Mars, Minimum orbit intersection distance, Minor Planet Center, Minor-planet moon, MIT Lincoln Laboratory, NASA, Near-Earth object, Observation arc, Orbital eccentricity, Orbital inclination, Perihelion and aphelion, Potentially hazardous object, Radar astronomy, S-type asteroid, Semi-major and semi-minor axes, Soot, Sun, Tisserand's parameter, Uncertainty parameter, Universal Time.
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
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).
The Amor asteroids are a group of near-Earth asteroids named after the asteroid 1221 Amor.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
The Arecibo Observatory is a radio telescope in the municipality of Arecibo, Puerto Rico.
Asteroids are minor planets, especially those of the inner Solar System.
An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside the scope of Earth.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
Astrophysics is the branch of astronomy that employs the principles of physics and chemistry "to ascertain the nature of the astronomical objects, rather than their positions or motions in space".
A binary asteroid is a system of two asteroids orbiting their common barycenter.
C-type (carbonaceous) asteroids are the most common variety, forming around 75% of known asteroids.
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.
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.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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.
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.
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 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.
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.
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
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.
A Mars-crossing asteroid (MCA, also Mars-crosser, MC) is an asteroid whose orbit crosses that of Mars.
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.
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
Minimum orbit intersection distance (MOID) is a measure used in astronomy to assess potential close approaches and collision risks between astronomical objects.
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.
A minor-planet moon is an astronomical object that orbits a minor planet as its natural satellite.
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.
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.
A near-Earth object (NEO) is any small Solar System body whose orbit can bring it into proximity with Earth.
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.
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 perihelion of any orbit of a celestial body about the Sun is the point where the body comes nearest to the Sun.
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.
Radar astronomy is a technique of observing nearby astronomical objects by reflecting microwaves off target objects and analyzing the reflections.
S-type asteroids are asteroids with a spectral type that is indicative of a silicaceous (i.e. stony) mineralogical composition, hence the name.
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.
Soot is a mass of impure carbon particles resulting from the incomplete combustion of hydrocarbons.
The Sun is the star at the center of the Solar System.
Tisserand's parameter (or Tisserand's invariant) is a value calculated from several orbital elements (semi-major axis, orbital eccentricity and inclination) of a relatively small object and a larger "perturbing body".
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.