A Mars-crossing asteroid (MCA, also Mars-crosser, MC) is an

asteroid An asteroid is a minor planet—an object larger than a meteoroid that is neither a planet nor an identified comet—that orbits within the Solar System#Inner Solar System, inner Solar System or is co-orbital with Jupiter (Trojan asteroids). As ...

whose

orbit In celestial mechanics, an orbit (also known as orbital revolution) is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an ...

crosses that of

Mars Mars is the fourth planet from the Sun. It is also known as the "Red Planet", because of its orange-red appearance. Mars is a desert-like rocky planet with a tenuous carbon dioxide () atmosphere. At the average surface level the atmosph ...

. Some Mars-crossers numbered below 100000 are listed here. They include the two numbered

Mars trojan The Mars trojans are a group of trojan objects that share the orbit of the planet Mars around the Sun. They can be found around the two Lagrangian points 60° ahead of and behind Mars. The origin of the Mars trojans is not well understood. One t ...

s 5261 Eureka and . Many databases, for instance the

JPL Small-Body Database The JPL Small-Body Database (SBDB) is an astronomy database about small Solar System bodies. It is maintained by Jet Propulsion Laboratory (JPL) and NASA and provides data for all known asteroids and several comets, including orbital parameters and ...

(JPL SBDB), only list asteroids with a

perihelion An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides (also called apse line, or major axis of the orbit) is the line connecting the two extreme values. Apsides perta ...

greater than 1.3 AU as Mars-crossers. An asteroid with a perihelion less than this is classed as a

near-Earth object A near-Earth object (NEO) is any small Solar System body orbiting the Sun whose closest approach to the Sun ( perihelion) is less than 1.3 times the Earth–Sun distance (astronomical unit, AU). This definition applies to the object's orbit a ...

even though it is crossing the orbit of Mars as well as crossing (or coming near to) that of Earth. Nevertheless, these objects are listed on this page. A grazer is an object with a perihelion below the aphelion of Mars (1.67 AU) but above the Martian perihelion (1.38 AU). The JPL SBDB lists 13,500 Mars-crossing asteroids. Only 18 MCAs are brighter than absolute magnitude (H) 12.5, which typically makes these asteroids with H<12.5 more than 13 km in diameter depending on the

albedo Albedo ( ; ) is the fraction of sunlight that is Diffuse reflection, diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects ...

. The smallest known MCAs have an absolute magnitude (H) of around 24 and are typically less than 100 meters in diameter. There are over 21,600 known Mars-crossers of which only 5751 have received a MPC number. Earth having more gravity and surface area than Mars attracts more impactors than Mars. Earth is impacted about 20 times more than the Moon, and Mars only gets impacted about 3 to 5 times more than the

Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

Co-orbital

(''leading cloud''): * (''trailing cloud''): * 5261 Eurekathe only named

* * * * * Candidates *

Inner grazers

* 1951 Lick * 4947 Ninkasi * (10302) 1989 ML * 15817 Lucianotesi * * * (52381) 1993 HA * 52387 Huitzilopochtli * * * * * * (85236) 1993 KH * * * * * *

Inner grazers that are also Earth-crossers or grazers

* 1620 Geographos * 1865 Cerberus * 2063 Bacchus * 3361 Orpheus * 3362 Khufu * 3753 Cruithne * 4034 Vishnu * 4581 Asclepius * 4769 Castalia * 6239 Minos * (10115) 1992 SK * 11500 Tomaiyowit * 12711 Tukmit *

(17511) 1992 QN (17511) 1992 QN (Minor planet provisional designation, provisional designation ) is a small, bright Apollo asteroid discovered on August 29, 1992 by American astronomers Eleanor F. Helin, Eleanor Helin and Jeff T. Alu, Jeff Alu at the Palomar Obs ...

* *

Mars-crossers that are also Earth-crossers or grazers

These objects are not catalogued as Mars-crossers in databases such as the

Jet Propulsion Laboratory The Jet Propulsion Laboratory (JPL) is a Federally funded research and development centers, federally funded research and development center (FFRDC) in La Cañada Flintridge, California, Crescenta Valley, United States. Founded in 1936 by Cali ...

's onlin
Small-body Database Browser
Instead, they are categorized as

Near Earth Object A near-Earth object (NEO) is any small Solar System body orbiting the Sun whose closest approach to the Sun (Apsis, perihelion) is less than 1.3 times the Earth–Sun distance (astronomical unit, AU). This definition applies to the object's orb ...

s (NEOs). * 1566 Icarus * 1685 Toro * 1862 Apollo * 1863 Antinous * 1864 Daedalus * 1866 Sisyphus * 1981 Midas * 2101 Adonis * 2102 Tantalus * 2135 Aristaeus * 2201 Oljato * 2212 Hephaistos * 2329 Orthos * 3103 Eger * 3200 Phaethon * 3360 Syrinx * 3671 Dionysus * 3752 Camillo * 3838 Epona * 4015 Wilson-Harrington * 4179 Toutatis * 4183 Cuno * 4197 Morpheus * 4257 Ubasti * 4341 Poseidon *

4450 Pan 4450 Pan ('' prov. designation:'' ) is a highly eccentric asteroid and contact binary, classified as a potentially hazardous asteroid and near-Earth object of the Apollo group, approximately 1.1 kilometers in diameter. It was discovered on 2 ...

* 4486 Mithra * 4660 Nereus * (4953) 1990 MU * 5011 Ptah * (5131) 1990 BG * 5143 Heracles * (5189) 1990 UQ * (5496) 1973 NA * (5645) 1990 SP * (5660) 1974 MA * (5693) 1993 EA * 5731 Zeus * 5786 Talos * (5828) 1991 AM * (6037) 1988 EG * * * 6063 Jason * (6455) 1992 HE * 6489 Golevka * (6611) 1993 VW *

(7025) 1993 QA (7025) 1993 QA is a sub-kilometer asteroid classified as near-Earth object of the Apollo asteroid, Apollo and Amor asteroid, Amor group, respectively. It was discovered on 16 August 1993, by astronomers of the Spacewatch program at the Kitt Peak ...

* 7092 Cadmus * (7335) 1989 JA * (7341) 1991 VK * (7350) 1993 VA * * (7753) 1988 XB * (7888) 1993 UC * (7889) 1994 LX * (8014) 1990 MF *

(8035) 1992 TB (8035) 1992 TB is an List of Apollo asteroids, Apollo asteroid, a type of Near-Earth Object. It is also a List of Venus-crossing minor planets, Venus-crosser and a List of Mars-crossing minor planets, Mars-crosser, although it doesn't make close ...

* (8176) 1991 WA * * * (8566) 1996 EN * (9058) 1992 JB * 9162 Kwiila * (9202) 1993 PB * (9856) 1991 EE * * * *

11066 Sigurd 11066 Sigurd (Minor planet provisional designation, provisional designation ) is a stony Contact binary (asteroid), contact binary asteroid classified as near-Earth object of the Apollo asteroid, Apollo group of asteroids, approximately 2.5 kilo ...

* 11311 Peleus * * 11885 Summanus * (12538) 1998 OH * 12923 Zephyr * (13651) 1997 BR * 14827 Hypnos * * * * * (17182) 1999 VU * * * * * * (22753) 1998 WT * * * (24443) 2000 OG * * 24761 Ahau * 25143 Itokawa * * * * *

(29075) 1950 DA ( provisional designation ) is a risk-listed asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately in diameter. It once had the highest known probability of impacting Earth. In 2002 ...

* * * * * * * (36236) 1999 VV * * (37638) 1993 VB * 37655 Illapa * 38086 Beowulf * * * * * (52340) 1992 SY * * * * * * * * * * * (65690) 1991 DG * * (65733) 1993 PC * 65803 Didymos * * * * * * * * * * * * * 69230 Hermes * * * * * * * *

Outer grazers

* 132 Aethra * 323 Brucia * 391 Ingeborg * 475 Ocllo * 512 Taurinensis * 699 Hela * 1009 Sirene * 1011 Laodamia * 1065 Amundsenia * 1131 Porzia * 1134 Kepler * 1139 Atami * 1170 Siva * 1198 Atlantis * 1204 Renzia * 1235 Schorria * 1293 Sonja * 1310 Villigera * 1316 Kasan * 1374 Isora * 1468 Zomba * 1474 Beira * 1508 Kemi * 1565 Lemaître * 1593 Fagnes * 1640 Nemo *

1656 Suomi 1656 Suomi ('' prov. designation:'' ) is a binary Hungaria asteroid and sizable Mars-crosser from the innermost regions of the asteroid belt. It was discovered on 11 March 1942, by Finnish astronomer Yrjö Väisälä at Turku Observatory in ...

* 1727 Mette * 1747 Wright * 1750 Eckert * 2035 Stearns * 2044 Wirt * 2055 Dvořák * 2064 Thomsen * 2074 Shoemaker * 2077 Kiangsu * 2078 Nanking *

2099 Öpik 2099 Öpik, provisional designation , is a dark and eccentric asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 5.1 kilometers in diameter. The asteroid was discovered on 8 November 1977, by American astronomer ...

2204 Lyyli 2204 Lyyli (Minor planet provisional designation, ''prov. designation'': ) is a dark asteroid and very eccentric Mars-crosser from the middle region of the asteroid belt, approximately in diameter. It was discovered on 3 March 1943 by Finnish a ...

* 2253 Espinette * 2423 Ibarruri * 2449 Kenos * 2577 Litva * 2744 Birgitta * 2937 Gibbs * 2968 Iliya * 3040 Kozai * 3163 Randi * 3198 Wallonia * 3216 Harrington * 3255 Tholen * 3267 Glo * 3270 Dudley * 3287 Olmstead * 3343 Nedzel * 3392 Setouchi * 3397 Leyla * 3401 Vanphilos * 3402 Wisdom * 3416 Dorrit * 3443 Leetsungdao * 3496 Arieso * 3581 Alvarez * 3635 Kreutz * 3674 Erbisbühl * 3737 Beckman * 3800 Karayusuf * 3854 George * 3858 Dorchester * 3873 Roddy * 3920 Aubignan * 4142 Dersu-Uzala * 4205 David Hughes * 4276 Clifford * 4435 Holt * 4451 Grieve * 4558 Janesick * 4910 Kawasato * 4995 Griffin * 5038 Overbeek * 5066 Garradd * 5201 Ferraz-Mello * 5230 Asahina * 5246 Migliorini * 5251 Bradwood * 5253 Fredclifford *

5275 Zdislava 5 (five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. Humans, and many other animals, have 5 digits on their limbs. Mathematics 5 is a Fermat pri ...

* 5335 Damocles * 5349 Paulharris * 5392 Parker * * 5585 Parks * 5621 Erb * 5641 McCleese * 5642 Bobbywilliams * 5649 Donnashirley * 5682 Beresford * 5720 Halweaver * 5738 Billpickering * 5817 Robertfrazer * 5870 Baltimore * 5892 Milesdavis * 5929 Manzano * 5999 Plescia * 6041 Juterkilian * 6042 Cheshirecat * 6141 Durda * 6170 Levasseur * 6172 Prokofeana * 6183 Viscome * 6249 Jennifer * 6261 Chione * 6263 Druckmüller * 6386 Keithnoll6386 Keithnoll at the JPL Small-Body Database Browser
/ref> * 6411 Tamaga * 6446 Lomberg * 6444 Ryuzin * * 6485 Wendeesther * 6487 Tonyspear * * 6500 Kodaira * 6523 Clube * 6585 O'Keefe * 6847 Kunz-Hallstein * * 6909 Levison * 7002 Bronshten * 7079 Baghdad * 7267 Victormeen * 7304 Namiki * 7330 Annelemaître * 7345 Happer * 7369 Gavrilin * 7445 Trajanus * *

7505 Furusho 7505 Furusho, provisional designation , is a stony asteroid and sizable Mars-crosser on an eccentric orbit from the asteroid belt, approximately in diameter. It was discovered on 3 January 1997, by Japanese astronomer Takao Kobayashi at the Ō ...

* 7660 Alexanderwilson * 7723 Lugger * 7778 Markrobinson * 7816 Hanoi * 7818 Muirhead * * 8251 Isogai * 8256 Shenzhou * 8355 Masuo * 8373 Stephengould * 8444 Popovich * 8651 Alineraynal * 8722 Schirra * (9068) 1993 OD * 9082 Leonardmartin * * 9551 Kazi * 9564 Jeffwynn * * 9671 Hemera * 9767 Midsomer Norton * * 9881 Sampson * * 10051 Albee * 10502 Armaghobs * * (10578) 1995 LH * 10737 Brück * 10984 Gispen * 11152 Oomine * * 11466 Katharinaotto * 11836 Eileen * (12009) 1996 UE * * * * * * 13551 Gadsden * * 13920 Montecorvino * (14017) 1994 NS * * * 14223 Dolby * 14309 Defoy * * * * * 15609 Kosmaczewski * 15673 Chetaev * (15700) 1987 QD * (15778) 1993 NH * 15790 Keizan * 16142 Leung * * 16465 Basilrowe * * 16529 Dangoldin * 16588 Johngee * * (16635) 1993 QO * 16724 Ullilotzmann * * * 16958 Klaasen * 17435 di Giovanni * 17493 Wildcat * 17555 Kenkennedy * 17640 Mount Stromlo * 17744 Jodiefoster * * * 18284 Tsereteli * 18398 Bregenz * 18499 Showalter * * * 18751 Yualexandrov * * * * 19080 Martínfierro * 19127 Olegefremov * * * (19877) 9086 P-L * * 20037 Duke * * * 20187 Janapittichova * * * * * (20958) A900 MA * 21001 Trogrlic * (21028) 1989 TO * * * 21104 Sveshnikov * * (21228) 1995 SC * * * 21966 Hamadori * 22168 Weissflog * 22283 Pytheas * 22385 Fujimoriboshi * 22449 Ottijeff * * * * * * 23738 van Zyl * * * * * 24495 Degroff * 24643 MacCready * 24654 Fossett * (24682) 1990 BH * * * * * * * * * * *

(26050) 3167 T-2 6 (six) is the natural number following 5 and preceding 7. It is a composite number and the smallest perfect number. In mathematics A six-sided polygon is a hexagon, one of the three regular polygons capable of tiling the plane. A hexagon a ...

* 26074 Carlwirtz * * (26129) 1993 DK * * * * 26471 Tracybecker * * 26858 Misterrogers * 26879 Haines * * * * 27657 Berkhey * * * * * * * (29407) 1996 UW * * * * * * (30717) 1937 UD * * 30767 Chriskraft * * 30775 Lattu * 30785 Greeley * 30786 Karkoschka * (30800) 1989 ST * (30856) 1991 XE * 30963 Mount Banzan * * 31098 Frankhill * * * * * 31415 Fenucci * * * * * * * * * * * * * 32890 Schwob * 32897 Curtharris * * (33060) 1997 VY * * 33330 Barèges * * * * * * * * 34817 Shiominemoto * 35056 Cullers * * * * * * * * (37314) 2001 QP * * (37367) 2001 VC * * (37479) 1130 T-1 * (37568) 1989 TP * 37596 Cotahuasi * * * (38063) 1999 FH * * * * * * * * (39561) 1992 QA * * 39741 Komm * * (40271) 1999 JT * (40315) 1999 LS * * * * * * * * * * * * * * (42501) 1992 YC * 42531 McKenna * 42609 Daubechies * * * * * * * * * * * * (45251) 1999 YN * (45764) 2000 LV * * * * * * * (47035) 1998 WS * * * * * * * * * * (48450) 1991 NA * * * (48621) 1995 OC * * * (49664) 1999 MV * * * * * * * * (51773) 2001 MV * * (52310) 1991 VJ * * 52384 Elenapanko * (52439) 1994 QL * (52453) 1994 WC * (52722) 1998 GK * * * * * * * * * * * * * (55757) 1991 XN * * * * * * * * * * * (58050) 2002 YA * (58070) 1034 T-2 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * (65757) 1994 FV * * 65784 Naderayama * * * (65999) 1998 ND * * * * * * 66458 Romaplanetario * * * * * * * * * * * * * * (69239) 1978 XT * 69260 Tonyjudt * * (69307) 1992 ON * 69311 Russ * (69350) 1993 YP * * * * * * * * * * 73534 Liviasavioli * (73575) 4789 P-L * * * * * (73865) 1997 AW * * * * * * * * * * * * * * * * * * * * * * * * * * 77971 Donnolo * * * * * (79219) 1994 LN * * * * * * * * * * * * * * * * * * * * * * * * * * (85118) 1971 UU * 85119 Hannieschaft * 85158 Phyllistrapp * * 85185 Lederman * (85235) 1993 JA * (85274) 1994 GH * * (85383) 1996 MS * * * * * * * (86373) 1999 YK * * * * * * * * * * * * * * * * * * (89454) 2001 XG * * * * * * * (90916) 1997 LR * * * * * * * * * (93040) 2000 SG * * * * * * * * * (95711) 2003 AK * * * * (96080) 7649 P-L

Mars-crossers

* 433 Eros * 719 Albert * 887 Alinda * 1036 Ganymed * 1221 Amor * 1580 Betulia * 1627 Ivar * 1915 Quetzálcoatl * 1916 Boreas * 1917 Cuyo * 1943 Anteros * 1980 Tezcatlipoca * 2059 Baboquivari * 2061 Anza * 2202 Pele * 2335 James * 2368 Beltrovata * 2608 Seneca * 2629 Rudra * 3102 Krok * 3122 Florence * 3199 Nefertiti * 3271 Ul *

3288 Seleucus 3288 Seleucus, provisional designation , is a rare-type stony asteroid, classified as near-Earth object of the Amor group of asteroids, approximately 2.5 kilometers in diameter. It was discovered on 28 February 1982, by German astronomer Hans-Em ...

* 3352 McAuliffe * 3551 Verenia * 3552 Don Quixote * 3553 Mera * 3691 Bede * (3757) Anagolay * 3833 Calingasta *

3908 Nyx 3908 Nyx is an Amor asteroid, Amor and Mars-crosser asteroid. It was discovered by Hans-Emil Schuster on August 6, 1980, and is named after Nyx (mythology), Nyx, the Greek mythology, Greek goddess of the night, after which Pluto's natural satel ...

* (3988) Huma * 4055 Magellan * 4401 Aditi * 4487 Pocahontas * 4503 Cleobulus * 4587 Rees * (4596) 1981 QB * (4688) 1980 WF * 4775 Hansen * 4954 Eric * 4957 Brucemurray * 5324 Lyapunov * 5332 Davidaguilar * 5370 Taranis * (5407) 1992 AX * (5587) 1990 SB * 5620 Jasonwheeler * (5626) 1991 FE * (5646) 1990 TR * 5653 Camarillo * (5732) 1988 WC * 5751 Zao * 5797 Bivoj * (5836) 1993 MF * 5863 Tara * (5867) 1988 RE * 5869 Tanith * 5879 Almeria * 6050 Miwablock * 6130 Hutton * (6178) 1986 DA * 6318 Cronkite * (6322) 1991 CQ * 6456 Golombek * (6491) 1991 OA * 6564 Asher * 6569 Ondaatje * 7088 Ishtar *

7096 Napier 7 (seven) is the natural number following 6 and preceding 8. It is the only prime number preceding a cube. As an early prime number in the series of positive integers, the number seven has symbolic associations in religion, mythology, supers ...

* (7236) 1987 PA * 7336 Saunders * 7358 Oze * (7474) 1992 TC * 7480 Norwan * 7604 Kridsadaporn * (7839) 1994 ND * * 8013 Gordonmoore * 8034 Akka * * * 8709 Kadlu * 9172 Abhramu * *

9950 ESA 9950 ESA, provisional designation , is an eccentric asteroid and elongated near-Earth object of the Amor asteroid, Amor group, approximately 1.7 kilometers in diameter. It was discovered on 8 November 1990, by French astronomer Christian Pollas ...

* 9969 Braille * (10150) 1994 PN * 10295 Hippolyta * 10416 Kottler * (10860) 1995 LE * (11054) 1991 FA * 11284 Belenus * * 12008 Kandrup * 13553 Masaakikoyama * (14402) 1991 DB * 15745 Yuliya * 16064 Davidharvey * (16636) 1993 QP * (16657) 1993 UB * 16695 Terryhandley * 16912 Rhiannon * *

18106 Blume Year 181 ( CLXXXI) was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Aurelius and Burrus (or, less frequently, year 934 ''Ab urbe condita''). The denomination 181 for this ye ...

* * * * (18736) 1998 NU * * * * (20086) 1994 LW * * 20460 Robwhiteley * * 21088 Chelyabinsk * * * * * (23621) 1996 PA * * * * * * * * * (26817) 1987 QB * * * * (30854) 1991 VB * * * (31345) 1998 PG * * (32906) 1994 RH * * * * * * (37336) 2001 RM * * * * * 39557 Gielgud * (39565) 1992 SL * * (39796) 1997 TD * * * (40329) 1999 ML * * * * * * * * * (54401) 2000 LM * * * (54690) 2001 EB * * (65674) 1988 SM * (65706) 1992 NA * * * * * * * * (85182) 1991 AQ * (85275) 1994 LY * * 85585 Mjolnir * * * * * * * * * * * * * * * * * * * * * * * * * * * * (89830) 2002 CE * * * * * * *

References

External links

Jet Propulsion Laboratory Small-Body Database Browser

Very Close Approaches (<0.01 AU) of PHAs to Mars 1900–2200

Upcoming Close Approaches (<0.10 AU) of Near-Earth Objects to Mars

{{Portal bar, Solar System * Mars-crossing