47 relations: Amor asteroid, Apollo 12, Apollo asteroid, Apollo program, Apparent magnitude, Apsis, Arizona, Astrometry, Astronomer, Astronomical unit, Aten asteroid, Catalina Sky Survey, Claimed moons of Earth, Degree (angle), Earth, Epoch (astronomy), Goldstone Deep Space Communications Complex, Gravity, Heliocentric orbit, Horseshoe orbit, Hyperbolic trajectory, International Astronomical Union, J002E3, Jet Propulsion Laboratory, Julian day, Julian year (astronomy), List of fast rotators (minor planets), Lunar distance (astronomy), Metre, Minor planet, Minor Planet Center, Minor planet designation, Natural satellite, Near-Earth object, NEODyS, Observation arc, Perturbation (astronomy), Quasi-satellite, Radar, Radiation pressure, S-IVB, Space debris, Space Science Institute, The Guardian, 3753 Cruithne, 6Q0B44E, 99942 Apophis.
The Amor asteroids are a group of near-Earth asteroids named after the asteroid 1221 Amor.
Apollo 12 was the sixth manned flight in the United States Apollo program and the second to land on the Moon.
The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s.
The Apollo program, also known as Project Apollo, was the third United States human spaceflight program carried out by the National Aeronautics and Space Administration (NASA), which accomplished landing the first humans on the Moon from 1969 to 1972.
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.
Arizona (Hoozdo Hahoodzo; Alĭ ṣonak) is a U.S. state in the southwestern region of the United States.
Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.
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.
The Aten asteroids are a dynamical group of asteroids whose orbits bring them into proximity with Earth.
Catalina Sky Survey (CSS; obs. code: 703) is an astronomical survey to discover comets and asteroids.
Claims of the existence of other moons of Earth—that is, of one or more natural satellites other than the Moon that orbit Earth—have existed for some time.
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.
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.
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.
Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward (or gravitate toward) one another.
A heliocentric orbit (also called circumsolar orbit) is an orbit around the barycenter of the Solar System, which is usually located within or very near the surface of the Sun.
A horseshoe orbit is a type of co-orbital motion of a small orbiting body relative to a larger orbiting body (such as Earth).
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.
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.
J002E3 is the designation given to an object in space discovered on September 3, 2002 by amateur astronomer Bill Yeung.
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.
This is a list of fast rotators—minor planets that have an exceptionally short rotation period, also called "rotation rate" or "spin rate".
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.
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.
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).
A natural satellite or moon is, in the most common usage, an astronomical body that orbits a planet or minor planet (or sometimes another small Solar System body).
A near-Earth object (NEO) is any small Solar System body whose orbit can bring it into proximity with Earth.
NEODyS (Near Earth Objects Dynamic Site) is an Italian and Spanish service that provides information on Near Earth Objects with a Web-based interface.
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.
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.
A quasi-satellite is an object in a specific type of co-orbital configuration (1:1 orbital resonance) with a planet where the object stays close to that planet over many orbital periods.
Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects.
Radiation pressure is the pressure exerted upon any surface due to the exchange of momentum between the object and the electromagnetic field.
The S-IVB (sometimes S-4B, always pronounced "ess four bee") was built by the Douglas Aircraft Company and served as the third stage on the Saturn V and second stage on the Saturn IB.
Space debris (also known as space junk, space waste, space trash, space litter or space garbage) is a term for the mass of defunct, artificially created objects in space, most notably in Earth orbit, such as old satellites and spent rocket stages.
The Space Science Institute (SSI) in Boulder, Colorado, is a nonprofit, public-benefit corporation formed in 1992.
The Guardian is a British daily newspaper.
3753 Cruithne (For instance, on the British television show Q.I. (Season 1; aired 11 Sept 2003).) is a Q-type, Aten asteroid in orbit around the Sun in 1:1 orbital resonance with Earth, making it a co-orbital object.
6Q0B44E, sometimes abbreviated to B44E, is a small object, probably an item of space debris, that is currently orbiting Earth outside the orbit of the Moon as of October 2016.
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.