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Comprehensive Asteroid and Comet Database | Space ReferenceComprehensive Asteroid and Comet Database | Space Reference Space Reference Compiled data & simulations for 1,302,506 celestial objects Welcome to SpaceReference.org. The purpose of this site is to catalog and showcase every known object in space. We've started with asteroids and comets but this open-source project is being quickly expanded. SpaceDB compiles data from the NASA/JPL Small Body Database, the IAU Minor Planet Center, and the NASA/JPL Center for Near Earth Object Studies. If you'd like to create a customized solar system model, take a look at the full-screen interactive solar system view.    or view a random object Asteroids and Comets We've organized hundreds of thousands celestial objects into these categories below for your perusal. Mouseover objects in the lists below to highlight them in the orbit view. Click or tap to learn more about each object. Largest These are among the largest and earliest discovered asteroids in our solar system. Ceres Dwarf Planet Ceres orbits the sun every 4.60 years and is about 939.400 km in diameter, comparable in size to the U.S. state of Alaska. Varuna Dwarf Planet Varuna orbits the sun every 282.00 years and is about 900.000 km in diameter, comparable in size to the U.S. state of Alaska. Vesta Dwarf Planet Vesta orbits the sun every 3.64 years and is about 525.400 km in diameter, comparable in size to Great Britain. Pallas Dwarf Planet Pallas orbits the sun every 4.60 years and is about 513.000 km in diameter, comparable in size to Great Britain. Hygiea Dwarf Planet Hygiea orbits the sun every 5.56 years and is about 407.120 km in diameter, comparable in size to the U.S. state of Iowa. Upcoming Approaches These objects have upcoming fly-bys of Earth. 2013 BF27 Very Small Near-Earth Close Approach 2013 BF27 orbits the sun every 1.62 years and is about 0.174 km in diameter, comparable in size to a football field. It will pass by Earth on Feb. 20, 2026. 2008 VR4 Very Small Near-Earth Close Approach 2008 VR4 orbits the sun every 0.88 years and is about 0.086 km in diameter, comparable in size to a school bus or smaller. It will pass by Earth on Feb. 20, 2026. 2007 DB61 Very Small Near-Earth Close Approach 2007 DB61 orbits the sun every 0.73 years and is about 0.087 km in diameter, comparable in size to a school bus or smaller. It will pass by Earth on Feb. 21, 2026. 2023 CM2 Very Small Near-Earth Close Approach 2023 CM2 orbits the sun every 3.01 years and is about 0.021 km in diameter, comparable in size to a school bus or smaller. It will pass by Earth on Feb. 21, 2026. 2021 CC6 Very Small Near-Earth Close Approach 2021 CC6 orbits the sun every 1.67 years and is about 0.003 km in diameter, comparable in size to a school bus or smaller. It will pass by Earth on Feb. 21, 2026. Potential Impactors These objects have the potential to impact Earth (listed by probability of impact). 2010 RF12 Very Small Near-Earth Close Approach 2010 RF12 orbits the sun every 1.09 years and is about 0.010 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 10.240% in 2095. 2017 WT28 Very Small Near-Earth Close Approach 2017 WT28 orbits the sun every 0.85 years and is about 0.012 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 1.098% in 2104. 2020 CD3 Very Small Near-Earth Close Approach 2020 CD3 orbits the sun every 1.04 years and is about 0.002 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 0.851% in 2082. 2006 RH120 Very Small Near-Earth Close Approach 2006 RH120 orbits the sun every 1.05 years and is about 0.006 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 0.505% in 2044. 2006 JY26 Very Small Near-Earth Close Approach 2006 JY26 orbits the sun every 1.02 years and is about 0.007 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 0.484% in 2074. Potential for Exploration It is relatively inexpensive to send a spacecraft to these objects in terms of propulsive cost (listed by delta-v). 2021 GM1 Very Small Near-Earth Close Approach 2021 GM1 orbits the sun every 0.97 years and is about 0.004 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 0.002% in 2122. 2023 FY3 Very Small Near-Earth Close Approach 2023 FY3 orbits the sun every 1.11 years and is about 0.007 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 0.000% in 2114. 2022 RD2 Very Small Near-Earth Close Approach 2022 RD2 orbits the sun every 1.05 years and is about 0.009 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 0.014% in 2087. 2022 OB5 Very Small Near-Earth 2022 OB5 orbits the sun every 1.01 years and is about 0.008 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 0.005% in 2109. 2000 SG344 Very Small Near-Earth Close Approach 2000 SG344 orbits the sun every 0.97 years and is about 0.055 km in diameter, comparable in size to a school bus or smaller. It will pass near Earth with an impact probability of 0.104% in 2071. In Honor Of... These objects are named after notable people. Einstein Mid-Sized Einstein orbits the sun every 2.69 years and is about 3.975 km in diameter, comparable in size to the island of Manhattan. Hawking Mid-Sized Hawking orbits the sun every 3.37 years and is about 2.013 km in diameter, comparable in size to Mount Everest. Sagan Mid-Sized Sagan orbits the sun every 3.26 years and is about 6.559 km in diameter, comparable in size to the San Francisco Bay. Armstrong Mid-Sized Armstrong orbits the sun every 3.31 years and is about 3.720 km in diameter, comparable in size to the island of Manhattan. Collins Mid-Sized Collins orbits the sun every 3.81 years and is about 8.976 km in diameter, comparable in size to the San Francisco Bay. Object Classifications The two most noteworthy classifications for asteroids are "Near Earth Asteroid" (NEA) and "Potentially Hazardous Asteroid" (PHA). Despite the names, neither classification indicates any direct danger to Earth. Near Earth Asteroids - asteroids whose orbit perihelion is less than 1.3 AU Potentially Hazardous Asteroids - near-Earth asteroids whose orbits passes within 0.05 AU of Earth's and whose absolute magnitude H is 22.0 or brighter Learn more about various NEO groups here. Categories Asteroids with known shapes - these asteroids have been mapped by light curve inversion, radar, or flybys. Click through to see 3D models. The categories below are orbital classifications as defined by NASA PDS: Unclassified Comet - Comets whose orbits do not match any defined orbit class Chiron-type Comet - Chiron-type comet, as defined by Levison and Duncan (TJupiter > 3; a > aJupiter) Encke-type Comet - Encke-type comet, as defined by Levison and Duncan (TJupiter > 3; a < aJupiter) Halley-type Comet - Halley-type comet, classical definition (20 y < P < 200 y) Hyperbolic Comet - Comets on hyperbolic orbits (e > 1.0) Jupiter-family Comet - Jupiter-family comets, as defined by Levison and Duncan (2 < TJupiter < 3) Parabolic Comet - Comets on parabolic orbits (e = 1.0) Amor-class Asteroid - Near-Earth asteroid whose orbits are similar to that of 1221 Amor (a > 1.0 AU; 1.017 AU < q < 1.3 AU) Apollo-class Asteroid - Near-Earth asteroids whose orbits cross the Earth's orbit similar to that of 1862 Apollo (a > 1.0 AU; q < 1.017 AU). Asteroid - Asteroid orbit not matching any defined orbit class Aten-class Asteroid - Near-Earth asteroid orbits similar to that of 2062 Aten (a < 1.0 AU; Q > 0.983 AU) Centaur-class Asteroid - Objects with orbits between Jupiter and Neptune (5.5 AU < a < 30.1 AU) Hyperbolic Asteroid - Asteroids on hyperbolic orbits (e > 1.0) Interior-Earth Asteroid - Asteroids with orbits contained entirely within the orbit of the Earth (Q < 0.983 AU) Inner Main-belt Asteroid - Asteroids with orbital elements constrained by (a < 2.0 AU; q > 1.666 AU) Main-belt Asteroid - Asteroids with orbital elements constrained by (2.0 AU < a < 3.2 AU; q > 1.666 AU) Mars-crossing Asteroid - Asteroids that cross the orbit of Mars constrained by (1.3 AU < q < 1.666 AU; a < 3.2 AU) Outer Main-belt Asteroid - Asteroids with orbital elements constrained by (3.2 AU < a < 4.6 AU) Parabolic Asteroid - Asteroids on parabolic orbits (e = 1.0) Jupiter Trojan - Asteroids trapped in Jupiter's L4/L5 Lagrange points (4.6 AU < a < 5.5 AU; e < 0.3) Trans-Neptunian Object - Objects with orbits outside Neptune (a > 30.1 AU) © 2021 Judy Mou and Ian Webster | Contact | Built with SpaceKit1772286417https://spacereference.org

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