A Mars-crossing asteroid (MCA, also Mars-crosser, MC) is an asteroid whose orbit crosses that of Mars. Some Mars-crossers numbered below 100000 are listed here. They include the two numbered Mars trojans 5261 Eureka and . Many databases, for instance the JPL Small-Body Database (JPL SBDB), only list asteroids with a perihelion greater than 1.3 AU as Mars-crossers. An asteroid with a perihelion less than this is classed as a near-Earth object 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. 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. Co-orbital (leading cloud): (trailing cloud): 5261 Eurekathe only named Mars trojan 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 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's online Small-body Database Browser. Instead, they are categorized as Near Earth Objects (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 4486 Mithra 4660 Nereus (4953) 1990 MU 5011 Ptah (5131) 1990 BG 5143 Heracles (5189)