Apollo asteroid

File:Neo orbit types.jpg

Common orbital subgroups of Near-Earth Objects (NEOs)

The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s. They are Earth-crossing asteroids that have an orbital semi-major axis greater than that of the Earth (a > 1 AU) but perihelion distances less than the Earth's aphelion distance (q < 1.017 AU).<ref name="NEO-groups" /><ref name="Wolfram-Apollo" />

Template:As of, the number of known Apollo asteroids is 21,083, making the class the largest group of near-Earth objects (cf. the Aten, Amor and Atira asteroids), of which 1,742 are numbered (asteroids are not numbered until they have been observed at two or more oppositions), 81 are named, and 2,130 are identified as potentially hazardous asteroids.<ref name="ssd-jpl">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

The closer their semi-major axis is to Earth's, the less eccentricity is needed for the orbits to cross. The Chelyabinsk meteor, that exploded over the city of Chelyabinsk in the southern Urals region of Russia on February 15, 2013, injuring an estimated 1,500 people with flying glass from broken windows, was an Apollo-class asteroid.<ref name="USA-Today-Chelyabinsk" /><ref name="NewScientist-Chelyabinsk" />

List

The largest known Apollo asteroid is 1866 Sisyphus, with a diameter of about 8.5 km. Examples of known Apollo asteroids include:

Designation	Year	Discoverer/First observed (A)	Ref
Template:Mpl	2024	ATLAS-SAAO	Template:MPC
Template:Mpl	2019	ATLAS-HKO	Template:MPC
Template:Mpl	2016	NEOWISE	Template:MPC
Template:Mpl	2014	CSS	Template:MPC
Template:Mpl	2013	CSS	Template:MPC
Template:Mpl	2013	CSS	Template:MPC
Template:Mpl	2011	LINEAR	Template:MPC(B)
Template:Mpl	2011	CSS–Mount Lemmon Survey	Template:MPC
Template:Mpl	2010	LINEAR	Template:MPC
Template:Mpl	2009	CSS	Template:MPC
Template:Mpl	2009	Siding Spring Observatory, Australia	Template:MPC
Template:Mpl	2008	LINEAR	Template:LoMP
Template:Mpl	2008	CSS	Template:MPC
Template:Mpl	2008	CSS–Mount Lemmon Survey	Template:MPC
Template:Mpl	2007	CSS	Template:MPC
Template:Mpl	2007	CSS	Template:MPC
Template:Mpl	2007	CSS	Template:MPC
Template:Mpl	2007	CSS–Mount Lemmon Survey	Template:MPC
Template:Mpl	2006	Spacewatch	Template:LoMP
Template:Mpl	2006	LINEAR	Template:LoMP
Template:Mpl	2006	Spacewatch	Template:LoMP
Template:Mpl	2005	R. S. McMillan, Steward Observatory, Kitt Peak, USA	Template:LoMP
Template:Mpl	2005	Mount Lemmon Survey	Template:MPC
Template:Mpl	2005	LONEOS	Template:MPC
Template:Mpl	2004	LINEAR	Template:MPC
Template:Mpl	2004	LINEAR	Template:LoMP
Template:Mpl	2004	LINEAR	Template:LoMP
Template:Mpl	2004	LINEAR	Template:LoMP
Template:Mpl	2003	James Whitney Young	Template:MPC
Template:Mpl	2003	James Whitney Young	Template:MPC
Template:Mpl	2002	LINEAR	Template:LoMP
Template:Mpl	2002	LINEAR	Template:LoMP
54509 YORP	2000	LINEAR	Template:LoMP
162173 Ryugu	1999	LINEAR	Template:LoMP
Template:Mpl	1999	LINEAR	Template:LoMP
101955 Bennu	1999	LINEAR (Bennu is the target of the OSIRIS-REx mission)	Template:LoMP
Template:Mpl	1998	Spacewatch	Template:MPC
Template:Mpl	1997	LINEAR	Template:LoMP
65803 Didymos	1996	Spacewatch	Template:LoMP
69230 Hermes	1937	Karl Reinmuth	Template:LoMP
Template:Mpl	1999	LINEAR	Template:LoMP
Template:Mpl	1998	LINEAR	Template:LoMP
Template:Mpl	1997	Spacewatch	Template:LoMP
25143 Itokawa	1998	LINEAR	Template:LoMP
(136617) 1994 CC	1994	Spacewatch	Template:LoMP
Template:Mpl	1996	R. H. McNaught, Siding Spring Observatory, Australia	Template:LoMP
6489 Golevka	1991	Eleanor F. Helin	Template:LoMP
4769 Castalia	1989	Eleanor F. Helin	Template:LoMP
4660 Nereus	1982	Eleanor F. Helin	Template:LoMP
4581 Asclepius	1989	Henry E. Holt, Norman G. Thomas	Template:LoMP
4486 Mithra	1987	Eric Elst, Vladimir Shkodrov	Template:LoMP
14827 Hypnos	1986	Carolyn S. Shoemaker, Eugene Merle Shoemaker	Template:LoMP
4197 Morpheus	1982	Eleanor F. Helin, Eugene Merle Shoemaker	Template:LoMP
4183 Cuno	1959	Cuno Hoffmeister	Template:LoMP
4179 Toutatis	1989	Christian Pollas	Template:LoMP
4015 Wilson–Harrington	1979	Eleanor F. Helin	Template:LoMP
3200 Phaethon	1983	Simon F. Green, John K.Davies / IRAS	Template:LoMP
2063 Bacchus	1977	Charles T. Kowal	Template:LoMP
1866 Sisyphus	1972	Paul Wild	Template:LoMP
1620 Geographos	1951	Albert George Wilson, Rudolph Minkowski	Template:LoMP
(29075) 1950 DA	1950	Carl A. Wirtanen	Template:LoMP
1566 Icarus	1949	Walter Baade	Template:LoMP
1685 Toro	1948	Carl A. Wirtanen	Template:LoMP
2101 Adonis	1936	Eugène Joseph Delporte	Template:LoMP
1862 Apollo	1932	Karl Reinmuth	Template:LoMP
(A) Discoverer: A discoverer is determined by the MPC when the object is numbered. For unnumbered bodies, the table gives the "first observer". LINEAR: Lincoln Near-Earth Asteroid Research CSS : Catalina Sky Survey Spacewatch, on Kitt Peak, near Tucson, Arizona<ref>Template:Citation</ref> (B) Classification: 2011 MD is classified as Amor, not Apollo asteroid by the MPC

See also

• Alinda group
• Amor asteroid
• Apollo asteroids (category)
• Apollo asteroid records
• Aten asteroid
• List of minor planets
• 2020 PP1

External links

• List of Apollo minor planets

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