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System of two asteroids orbiting their common center of mass
A binary asteroid is a system of two asteroids orbiting their common barycenter. The binary nature of 243 Ida was discovered when the Galileo spacecraft
Binary_asteroid
Small Solar System body that is composed of two bodies
bilobated, peanut-like overall shape. Contact binaries are distinct from true binary systems such as binary asteroids where both components are separated. The
Contact binary (small Solar System body)
Contact_binary_(small_Solar_System_body)
Natural satellite of a minor planet
The term double asteroid is sometimes used for systems in which the asteroid and its moon are roughly the same size, while binary tends to be used independently
Minor-planet_moon
Main belt asteroid target of the Lucy mission
1999 VD57) is a binary main-belt asteroid about 740 meters (2,400 feet) in diameter. It was discovered by the Lincoln Near-Earth Asteroid Research (LINEAR)
152830_Dinkinesh
Near-Earth asteroid
sub-kilometer asteroid and binary system that is classified as a potentially hazardous asteroid and near-Earth object of the Apollo group. The asteroid was discovered
65803_Didymos
Two astronomical bodies which orbit each other
of binary system are binary stars and binary asteroids, but brown dwarfs, planets, neutron stars, black holes and galaxies can also form binaries. A multiple
Binary_system
2021 NASA planetary defense mission
deflect an asteroid by hitting it head-on. The target asteroid, Dimorphos, is a 525 feet (160 m) wide moonlet of the asteroid Didymos; neither asteroid poses
Double Asteroid Redirection Test
Double_Asteroid_Redirection_Test
Planetary defence spacecraft developed by the ESA
Agency (ESA). Its primary mission objective is to study the Didymos binary asteroid system that was impacted in 2022 by NASA's DART spacecraft, contributing
Hera_(space_mission)
Largest Jupiter trojan
Patroclus, another large trojan asteroid of the L5 group, consists of two almost equal-sized components. Two other binary asteroids are known in the L5 group
624_Hektor
Jupiter trojan asteroid
Patroclus (/pəˈtroʊkləs/ pə-TROH-kləs) is a large binary Jupiter trojan asteroid. It is a dark D-type asteroid and a slow rotator, due to the 103-hour orbital
617_Patroclus
Asteroid
asteroid, dwelling in the interior of Earth's orbit. It is classified as a near-Earth object. Atira is a binary asteroid, a system of two asteroids orbiting
163693_Atira
Binary main-belt active asteroid
binary active asteroid and main-belt comet from the outer regions of the asteroid belt. The object was discovered by Spacewatch in 2006. Its binary nature
(300163)_2006_VW139
Minor planet found within the inner Solar System
are probably solid. Some asteroids have moons or are co-orbiting binaries: rubble piles, moons, binaries, and scattered asteroid families are thought to
Asteroid
Moon of asteroid 152830 Dinkinesh
Selam (formal designation Dinkinesh I) is a contact binary moon of 152830 Dinkinesh, a main-belt asteroid. It was discovered by NASA's Lucy spacecraft during
Selam_(moon)
Binary near-Earth asteroid
provisional designation 1999 KW4, is a binary asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Aten group, approximately
66391_Moshup
Proposed asteroid space missions
will target 65803 Didymos, a binary asteroid system in which one asteroid is orbited by a smaller one. The primary asteroid is about 800 metres (2,600 ft)
AIDA (international space cooperation)
AIDA_(international_space_cooperation)
Double asteroid system in the outer asteroid belt
difference in mass is less than 2%), making it a truly "double" asteroid. Its binary nature was discovered on 10 August 2000 by a group of astronomers
90_Antiope
Near-Earth asteroid
Steward Observatory. It is a contact binary asteroid, with two lobes separated by a distinct "neck"; altogether, the asteroid is on average 2 kilometres (1.2 mi)
(8567)_1996_HW1
Binary system where two planetary-mass objects share an orbital axis external to both
Varda–Ilmarë. Binary asteroids with components of roughly equal mass are sometimes referred to as double minor planets. These include binary asteroids 69230 Hermes
Double_planet
2025). "The Geology of a Small Main-belt S-class Binary Asteroid System: Dinkinesh and Its Contact Binary Satellite Selam as Observed by the Lucy Mission"
List of Solar System objects by size
List_of_Solar_System_objects_by_size
Topics referred to by the same term
stellar binary that is luminous in x-ray frequencies Binary planet, two planetary bodies of comparable mass orbiting each other Binary asteroid, two asteroids
Binary
Topics referred to by the same term
theory Binary system (astronomy), a system of two celestial bodies on a mutual orbit Binary asteroid Binary star Contact binary Contact binary (asteroid) Double
Binary system (disambiguation)
Binary_system_(disambiguation)
Near-Earth asteroid
(285263) 1998 QE2 is a dark asteroid and synchronous binary system, classified as a near-Earth object and potentially hazardous asteroid of the Amor group, approximately
(285263)_1998_QE2
Binary Florian asteroid from the inner regions of the asteroid belt
Arlon, provisional designation 1954 AC, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 8.5 kilometers in diameter
1717_Arlon
Binary near-Earth asteroid
(809875) 2020 BX12 is a sub-kilometer binary asteroid, classified as a near-Earth asteroid and potentially hazardous object of the Apollo group. It was
(809875)_2020_BX12
Moon of asteroid Didymos
is a natural satellite or moon of the near-Earth asteroid 65803 Didymos, with which it forms a binary system. The moon was discovered on 20 November 2003
Dimorphos
Main-belt asteroid
johnstonsarchive.net Asteroids with Satellites, Robert Johnston, johnstonsarchive.net [1], Prediction and Reduction of Stellar Occultations of Binary Asteroids 22 Kalliope
22_Kalliope
Sub-kilometer sized asteroid and binary system on an eccentric orbit
Hermes is a sub-kilometer sized asteroid and binary system on an eccentric orbit, classified as a potentially hazardous asteroid and near-Earth object of the
69230_Hermes
Eccentric asteroid and suspected contact-binary
SB), is an eccentric asteroid and suspected contact-binary, classified as a near-Earth object and potentially hazardous asteroid, approximately 2 kilometers
4486_Mithra
Exploitation of raw materials from asteroids
Asteroid mining is the hypothetical and technically possible extraction of materials from asteroids and other minor planets, including near-Earth objects
Asteroid_mining
Main-belt asteroid
star W Ursae Majoris, which raised suspicions that the asteroid might be a binary or contact binary. This prompted an international campaign for observing
44_Nysa
Asteroid
designation 1994 KA, is a stony Phocaea asteroid and an asynchronous binary system from the inner regions of the asteroid belt, approximately 10 kilometers
13123_Tyson
Hungaria asteroid and a possible binary system
1984 YV, is a rather elongated Hungaria asteroid and a possible binary system from the inner regions of the asteroid belt, approximately 3 kilometers in diameter
4440_Tchantchès
Smaller and outer moon of Mars
out that the capture could have occurred if the original body was a binary asteroid that separated due to tidal forces. The main alternative hypothesis
Deimos_(moon)
Asteroid spectral type
M-class) asteroids are a spectral class of asteroids which appear to contain higher concentrations of metal phases (e.g. iron-nickel) than other asteroid classes
M-type_asteroid
Binary near-Earth asteroid
is a binary pair of asteroids of approximately equal size and mass, each about 0.9 km (0.56 mi) in diameter. Classified as a near-Earth asteroid and potentially
2017_YE5
Binary main-belt asteroid
4337 Arecibo is a binary asteroid in the outer regions of the asteroid belt, approximately 24 kilometers (15 miles) in diameter. It was discovered on 14
4337_Arecibo
Asteroid
bright asteroid and synchronous binary system on a highly eccentric orbit, classified as a near-Earth object and potentially hazardous asteroid of the
(164121)_2003_YT1
Group of near-Earth asteroids
albedo of 0.22 is assumed based on its known stony composition) (B) Binary asteroid List of minor planet groups List of minor planets List of Mercury-crossing
Atira_asteroid
System: asteroids, distant objects, and dwarf planets, but not comets. As of 2022, the vast majority (97.3%) are asteroids from the asteroid belt. Their
Lists_of_minor_planets
Apollo asteroid target of Hayabusa2's extended mission
from the center of the asteroid on 5 July 2026. Observations by Hayabusa2 have shown that Torifune is a contact binary asteroid. Telescope observations
98943_Torifune
Near-Earth asteroid
for binary asteroids in the near-Earth population. The PROCYON probe developed by JAXA and the University of Tokyo was intended to flyby this asteroid before
(185851)_2000_DP107
Main-belt asteroid binary
Hermione is a very large binary asteroid discovered in 1872. It orbits in the Cybele group in the far outer asteroid belt. As an asteroid of the dark C spectral
121_Hermione
Center of mass of multiple bodies orbiting each other
Charon, one of Pluto's natural satellites, as well as for many binary asteroids and binary stars. When the less massive object is far away, the barycenter
Barycenter
Binary near-Earth asteroid
(35107) 1991 VH is a binary near-Earth asteroid and potentially hazardous asteroid of the Apollo group. It was discovered on 9 November 1991, by Australian
(35107)_1991_VH
Main-belt asteroid binary
(15430) 1998 UR31 is a main-belt binary asteroid. It was discovered through the Beijing Schmidt CCD Asteroid Program at the Xinglong Station in the Chinese
(15430)_1998_UR31
Main-belt asteroid binary
(6265) 1985 TW3 is a background asteroid and binary system from the inner regions of the asteroid belt. It was discovered on 11 October 1985, by astronomer
(6265)_1985_TW3
Binary asteroid
(provisional designation 1999 TO14) is a Koronian asteroid and binary system from the outer region of the asteroid belt, approximately 5 kilometers in diameter
22899_Alconrad
Stony binary asteroid and slow rotator from the inner regions of the asteroid belt
designation 1990 BM, is a stony, synchronous binary asteroid and slow rotator from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter
4951_Iwamoto
Asteroid sharing the orbit of Jupiter
The Jupiter trojans, commonly called trojan asteroids or simply trojans, are a large group of asteroids that share the planet Jupiter's orbit around the
Jupiter_trojan
Bodies orbiting within the main asteroid belt which have shown cometary activity
into the asteroid moon of the binary asteroid 65803 Didymos, NASA's Double Asteroid Redirection Test spacecraft made Dimorphos an active asteroid. Scientists
Active_asteroid
Asteroid
designation 1986 TE, is a bright Vestian asteroid and asynchronous binary system from the inner regions of the asteroid belt, approximately 6.5 kilometers (4
3782_Celle
Near-Earth object
1996 FG3 is a carbonaceous asteroid and binary system, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately
(175706)_1996_FG3
Larger of the two moons of Mars
Deimos, Mars's other moon, are captured asteroids. Landis, Geoffrey A.; "Origin of Martian Moons from Binary Asteroid Dissociation", American Association
Phobos_(moon)
NASA mission to fly by eight asteroids
journey to eight different asteroids. It is slated to visit two main belt asteroids as well as six Jupiter trojans – asteroids that share Jupiter's orbit
Lucy_(spacecraft)
Large asteroid in the asteroid belt
largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56 Yang, B.; et al. (September 2020), "Binary asteroid (31) Euphrosyne:
31_Euphrosyne
Near-Earth asteroid
designation 1992 CC1) is a stony contact binary asteroid classified as a near-Earth object of the Apollo group of asteroids, approximately 2.5 kilometers in diameter
11066_Sigurd
Stony asteroid and binary system from the middle regions of the asteroid belt
provisional designation 1982 KC1, is a stony asteroid and binary system from the middle regions of the asteroid belt, approximately 8 kilometers in diameter
4029_Bridges
Highly eccentric, rare-type asteroid and synchronous binary system
asteroid and synchronous binary system, classified as a near-Earth object of the Apollo group, approximately 4.8 kilometers in diameter. The asteroid
5143_Heracles
Hungaria asteroid and binary system from the inner regions of the asteroid belt
designation 1938 YG) is a rare-type Hungaria asteroid and binary system from the inner regions of the asteroid belt, approximately 8 kilometers in diameter
1509_Esclangona
Natural satellites of the planet Mars
out that the capture could have occurred if the original body was a binary asteroid that separated under tidal forces. Phobos could be a second-generation
Moons_of_Mars
Main-belt asteroid
provisional designation 9512 P-L, is a Florian asteroid and suspected binary from the inner regions of the asteroid belt, approximately 3.1 kilometers in diameter
6615_Plutarchos
Stony near-Earth object of the Aten group
synchronous binary system measures approximately 800 meters (0.50 miles) in diameter. It was discovered by astronomers of the Lincoln Near-Earth Asteroid Research
(66063)_1998_RO1
Minor planet and Koronis family asteroid
761 Brendelia is a binary asteroid orbiting the Sun that was discovered by German astronomer Franz Kaiser on 8 September 1913, and named after Otto Rudolf
761_Brendelia
Main-belt asteroid binary
(provisional designation 1927 AA) is a stony Phocaea asteroid and binary system from the inner regions of the asteroid belt, approximately 15 kilometers (9.3 miles)
1626_Sadeya
Radar system used for investigating objects in the Solar System
of different characteristics. For example, most existing images of binary asteroids were obtained through radar astronomy. Moons of Jupiter Rings and moons
Goldstone_Solar_System_Radar
Bright binary Vestian asteroid
provisional designation 1990 CH, is a bright binary Vestian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers (2.5 miles)
5481_Kiuchi
Asteroid
then radar observations of other asteroids have found other contact binaries. Castalia is a potentially hazardous asteroid (PHA) because its minimum orbit
4769_Castalia
Main-belt asteroid binary
designation: 1973 SB3) is a stony Flora asteroid and asynchronous binary system from the inner regions of the asteroid belt, approximately 5 kilometers (3
2006_Polonskaya
Binary near-Earth asteroid
326732 Nice (/ˈniːs/ NEESS; provisional designation 2003 HB6) is a binary near-Earth asteroid. It was discovered on 25 April 2003 by the Lowell Observatory
326732_Nice
Stony main-belt binary asteroid
designation 1968 HA, is a stony Florian asteroid and an asynchronous binary system from the inner regions of the asteroid belt, approximately 8 kilometers (5
1830_Pogson
Binary Florian asteroid
Soma, provisional designation 1982 RL, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter
2815_Soma
Main-belt asteroid
243 Ida is an asteroid in the Koronis family of the asteroid belt. It was discovered on 29 September 1884 by Austrian astronomer Johann Palisa at Vienna
243_Ida
Mars-crossing asteroid binary
(5407) 1992 AX is a stony asteroid and a synchronous binary Mars-crosser from the innermost region of the asteroid belt, approximately 3.6 kilometers (2
(5407)_1992_AX
Stony near-Earth asteroid
1862 Apollo /əˈpɒloʊ/ is a stony asteroid, approximately 1.5 kilometers in diameter, classified as a near-Earth object (NEO). It was discovered by German
1862_Apollo
Vestian asteroid and binary system
provisional designation 4575 P-L is a stony Vestian asteroid and binary system from the inner regions of the asteroid belt, approximately 9 kilometers in diameter
3868_Mendoza
Main-belt asteroid
317 Roxane is an asteroid from the asteroid belt approximately 19 km in diameter. It was discovered by French astronomer Auguste Charlois from Nice on
317_Roxane
Binary Amor asteroid orbiting between Earth and the asteroid belt
3671 Dionysus is a small binary Amor asteroid, orbiting between Earth and the asteroid belt. It was discovered by Carolyn and Gene Shoemaker at Palomar
3671_Dionysus
Main-belt asteroid
41 Daphne is a large asteroid from the asteroid belt. It is a dark-surfaced body 187 km in diameter and is probably composed of primitive carbonaceous
41_Daphne
Mission: Detailed Characterization of the DART Impact Outcome and of the Binary Asteroid (65803) Didymos". The Planetary Science Journal. 3 (7): 160. Bibcode:2022PSJ
List of minor planets and comets visited by spacecraft
List_of_minor_planets_and_comets_visited_by_spacecraft
Main-belt asteroid
provisional designation: 1978 PR4, is a stony Flora asteroid and binary system from the inner regions of the asteroid belt. It was discovered on 1 August 1978,
4362_Carlisle
Sub-kilometer asteroid and synchronous binary system
BT18 is a sub-kilometer asteroid and synchronous binary system, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. It
(450894)_2008_BT18
Asteroid named after goddess Ishtar
7088 Ishtar, provisional designation 1992 AA, is a synchronous binary asteroid and near-Earth object from the Amor group, approximately 1.3 kilometers
7088_Ishtar
Main-belt asteroid binary
designation 1996 HA15, is a Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 4.8 kilometers (3
8116_Jeanperrin
Asteroid rotation perturbation
considered for asteroids with their heliocentric orbit in the Solar System. The effect is responsible for the creation of binary and tumbling asteroids as well
YORP_effect
Stony Florian asteroid and synchronous binary asteroid
Florian asteroid and synchronous binary asteroid from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter. The asteroid was discovered
3034_Climenhaga
Space probe concept
selected as a binary asteroid, so that the effect of the deflection would be seen even from Earth by observing the period of the binary. The targets were
Don_Quijote_(spacecraft)
Hungaria asteroid from the inner regions of the asteroid belt
designation 1982 BH, is a nearly spheroidal, binary Hungaria asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter
3309_Brorfelde
the near-Earth asteroid Kamoʻoalewa, a quasi-satellite of Earth, for sample collection and JAXA's Hayabusa2 flew by the near-Earth asteroid Torifune. The
2026_in_spaceflight
Hungaria asteroid and synchronous binary system
designation 1938 ED1, is a stony Hungaria asteroid and synchronous binary system from the innermost regions of the asteroid belt, approximately 7 kilometers in
1453_Fennia
Main-belt asteroid
Donaldjohanson is an asteroid located in the inner main asteroid belt, between the orbits of Mars and Jupiter. It is an elongated contact binary consisting of
52246_Donaldjohanson
Hungaria asteroid and binary system
provisional designation 1989 UH2, is a Hungaria asteroid and binary system from the innermost regions of the asteroid belt, approximately 3 kilometers (2 miles)
5477_Holmes
Florian asteroid and synchronous binary system
designation 1927 WB, is an elongated Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 12 kilometers in
1089_Tama
Near-Earth asteroid discovered in 2004
is a bright sub-kilometer asteroid and binary system, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately
(357439)_2004_BL86
Hungaria asteroid, Mars-crosser and suspected synchronous binary system
is a stony Hungaria asteroid, Mars-crosser and suspected synchronous binary system from the innermost regions of the asteroid belt, approximately 4
2074_Shoemaker
Asteroid
is a stony Phocaean asteroid, sizable Mars-crosser, and binary system on an eccentric orbit from the inner regions of the asteroid belt, approximately
7369_Gavrilin
Main-belt asteroid
Levy, provisional designation 1985 QS, is a binary Flora asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter
3673_Levy
Largest Apollo asteroid
1866 Sisyphus /ˈsɪsɪfəs/ is a binary stony asteroid, near-Earth object and the largest member of the Apollo group, approximately 7 kilometers in diameter
1866_Sisyphus
Near-Earth asteroid
(190166) 2005 UP156 is a stony asteroid and binary system, classified as a near-Earth object of the Apollo group, approximately 1 kilometer in diameter
(190166)_2005_UP156
Asteroid binary
designation 2000 GL74) is a stony Koronian asteroid and binary system from the outer regions of the asteroid belt, approximately 4.6 kilometers in diameter
17246_Christophedumas
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BINARY ASTEROID
BINARY ASTEROID
BINARY ASTEROID
BINARY ASTEROID
BINARY ASTEROID
BINARY ASTEROID
BINARY ASTEROID
BINARY ASTEROID
BINARY ASTEROID
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