Orbit diagram of asteroid Amun with location as of September 9, 2012 | |
Discovery | |
---|---|
Discovered by | C. Shoemaker E. M. Shoemaker |
Discovery date | 4 March 1986 |
Designations | |
(3554) Amun | |
Named after | Amun |
1986 EB | |
Aten [1] Venus-crosser asteroid | |
Orbital characteristics [1] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 0 | |
Observation arc | 10923 days (29.91 yr) |
Aphelion | 1.24677 AU (186.514 Gm) |
Perihelion | 0.700578 AU (104.8050 Gm) |
0.973675 AU (145.6597 Gm) | |
Eccentricity | 0.28048 |
0.961 yr (350.9 d) | |
184.781° | |
1.02585°/day | |
Inclination | 23.3626° |
358.627° | |
359.392° | |
Earth MOID | 0.250204 AU (37.4300 Gm) |
Physical characteristics | |
3.341 km [1] | |
Mass | ~ 1.6×1013 kg |
2.53001 h (0.105417 d) [1] | |
0.1284±0.024 [1] | |
M-type asteroid | |
15.82 [1] | |
3554 Amun is an Aten asteroid, meaning it crosses Earth's orbit, and a Venus-crosser. It was discovered on 4 March 1986 by Carolyn and Eugene Shoemaker at Mount Palomar Observatory, and named for the ancient Egyptian deity Amun. [2] Amun was the fifth Aten asteroid to be numbered.
Photometric observations of 3554 Amun during 2017–2018 were combined to determine a rotation period of 2.53029±0.00002 hours. [3] It has been classified as an M-type asteroid in the Tholen taxonomy, X-type in the Bus taxonomy, and C-, X-, and D-type in the Bus-DeMeo taxonomy. The featureless optical spectrum has a similar slope to the Tagish Lake meteorite, although 3554 Amun is not considered the source. [4] The infrared spectrum of 3554 Amun was found to match a D-type asteroid taxonomy. [5] The estimated diameter is 3.341 kilometers, [1] making it one of the smallest known asteroids to have an M-type classification.[ citation needed ]
Amun was once considered metallic, based on an M-type optical spectrum. In Mining the Sky , planetary scientist John S. Lewis calculated the purported value of a metallic 3554 Amun at $20 trillion. [6] (6178) 1986 DA is another M-type near-Earth asteroid with lower inclination that is actually metallic.
Amun passes close to Venus, and in 1964, 2034, and 2103 comes within 10 Gm of it. [1]
4197 Morpheus, provisional designation 1982 TA, is a highly eccentric asteroid and near-Earth object of the Apollo group, approximately 3 kilometers in diameter. It was discovered on 11 October 1982, by American astronomers Eleanor Helin and Eugene Shoemaker at Palomar Observatory in California, United States. The asteroid was later named for Morpheus from Greek mythology.
(53319) 1999 JM8 is an asteroid, slow rotator and tumbler, classified as a near-Earth object and potentially hazardous asteroid (PHA) of the Apollo group, approximately 7 kilometers (4 miles) in diameter, making it the largest PHA known to exist. It was discovered on 13 May 1999, by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico.
2003 YN107 is a tiny asteroid, classified as a near-Earth object of the Aten group moving in a 1:1 mean-motion resonance with Earth. Because of that, it is in a co-orbital configuration relative to Earth.
32 Pomona is a stony main-belt asteroid that is 81 kilometres (50 mi) in diameter. It was discovered by German-French astronomer Hermann Mayer Salomon Goldschmidt on October 26, 1854, and is named after Pōmōna, the Roman goddess of fruit trees.
38 Leda is a large, dark main-belt asteroid that was discovered by French astronomer J. Chacornac on January 12, 1856, and named after Leda, the mother of Helen of Troy in Greek mythology. In the Tholen classification system, it is categorized as a carbonaceous C-type asteroid, while the Bus asteroid taxonomy system lists it as a Cgh asteroid. The spectra of the asteroid displays evidence of aqueous alteration.
(99907) 1989 VA is a very eccentric, stony asteroid and near-Earth object, approximately 1 kilometer in diameter. It was discovered on 2 November 1989, by American astronomer couple Carolyn and Eugene Shoemaker and Canadian astronomer David Levy at the Palomar Observatory on Mount Palomar, California.
(33342) 1998 WT24 is a bright, sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid (PHA) of the Aten group, located in Venus's zone of influence that has frequent close encounters with Mercury, Venus, and Earth. It made a close approach to Earth on 11 December 2015, passing at a distance of about 4.2 million kilometers (2.6 million miles, 11 lunar distances) and reaching about apparent magnitude 11.
308 Polyxo is a main-belt asteroid that was discovered by A. Borrelly on 31 March 1891, in Marseilles. It is orbiting the Sun at a distance of 2.75 AU with a low orbital eccentricity (ovalness) of 0.04 and a period of 4.56 yr. The orbital plane is tilted at an angle of 4.36° to the plane of the ecliptic.
354 Eleonora is a large, stony main-belt asteroid that was discovered by the French astronomer Auguste Charlois on January 17, 1893, in Nice.
1685 Toro is an asteroid and near-Earth object of the Apollo group on an eccentric orbit. It was discovered on 17 July 1948, by American astronomer Carl Wirtanen at Lick Observatory on Mount Hamilton, California. The stony S-type asteroid has a rotation period of 10.2 hours and measures approximately 4 kilometers in diameter. It is named for Betulia Toro Herrick, wife of astronomer Samuel Herrick. The Sylacauga meteorite appears to have originated from this asteroid.
524522 Zoozve (provisional designation 2002 VE68) is a sub-kilometer sized asteroid and temporary quasi-satellite of Venus. Discovered in 2002, it was the first such object to be discovered around a major planet in the Solar System. It has nearly the same orbital period around the Sun that Venus does. In a frame of reference rotating with Venus, it appears to travel around it during one Venerean year, but it orbits the Sun, not Venus.
(185851) 2000 DP107 is a sub-kilometer sized asteroid, classified as potentially hazardous asteroid and near-Earth object of the Apollo group that is notable because it provided evidence 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 its ion thruster failed and could not be restarted.
1943 Anteros, provisional designation 1973 EC, is a spheroidal, rare-type asteroid and near-Earth object of the Amor group, approximately 2 kilometers in diameter.
3199 Nefertiti, provisional designation 1982 RA, is a rare-type asteroid, classified as near-Earth object of the Amor group of asteroids, approximately 2.2 kilometers in diameter. It was discovered on 13 September 1982, by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory, California, United States.
(322756) 2001 CK32 is a sub-kilometer asteroid and near-Earth object of the Aten group. It is also a transient Venus co-orbital, and a Mercury grazer as well as an Earth crosser. It was once designated as a potentially hazardous asteroid.
2012 XE133 is an asteroid, classified as near-Earth object of the Aten group that is a temporary co-orbital of Venus.
(66063) 1998 RO1 is a stony near-Earth object of the Aten group on a highly-eccentric orbit. The synchronous binary system measures approximately 800 meters (0.50 miles) in diameter. It was discovered by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, on 14 September 1998.
2013 ND15 (also written 2013 ND15) is an asteroid that is a temporary trojan of Venus, the first known Venus trojan.
(341843) 2008 EV5, provisional designation 2008 EV5, is a sub-kilometer asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Aten group, approximately 400 metres (1,300 feet) in diameter. It was discovered on 4 March 2008, by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory near Tucson, Arizona, United States.
2020 PN1 is a sub-kilometer asteroid, classified as a near-Earth object of the Aten group, that is a temporary horseshoe companion to the Earth. There are dozens of known Earth horseshoe librators, some of which switch periodically between the quasi-satellite and the horseshoe co-orbital states.