This is a list of Aten asteroids, a group of near-Earth objects. , there are 1125 known Atens, most of which remain provisionally designated without a number, as they have not been observed at two or more oppositions. The list is divided into named members, brightest, notable and other record holding Aten asteroids. For a list of existing articles, see Aten asteroids (category).
Named Atens
Aten asteroids are generally named after Egyptian deities. , a total of fourteen Aten asteroids have received a name. They are listed in chronological order of discovery.
Number Name Year Discoverer 2062 Aten 1976 Eleanor F. Helin 2340 Hathor 1976 Charles T. Kowal 2100 Ra-Shalom 1978 Eleanor F. Helin 3362 Khufu 1984 R. Scott Dunbar, Maria A. Barucci 3554 Amun 1986 Carolyn S. Shoemaker, Eugene M. Shoemaker 3753 Cruithne 1986 J. Duncan Waldron 5381 Sekhmet 1991 Carolyn S. Shoemaker 136818 Selqet 1997 Roy Tucker 326290 Akhenaten 1998 Roy Tucker 66391 Moshup 1999 LINEAR 524522 Zoozve 2002 LONEOS 99942 Apophis 2004 Roy Tucker, David J. Tholen and Fabrizio Bernardi 398188 Agni 2010 WISE 367943 Duende 2012 Observatorio Astronómico de La Sagra (OAM)
The February 15, 2013 Earth encounter shortened 367943 Duende's orbital period to about 317 days, changing its orbital class from Apollo to Aten.
Brightest Atens
The following lists Aten asteroids thought to be larger than 2 kilometers across. Assuming an albedo of 0.15, this converts to an absolute magnitude of about 16.2
Designation Discovery date Absolute magnitude Diameter (km) Catalog 1998/10/13 14.5 1999/04/20 14.5 3753 Cruithne 1986/10/10 15.6 2000/03/15 15.8 2000/07/10 15.8 3554 Amun 1986/03/04 15.82 2000/09/20 16.0 2100 Ra-Shalom 1978/09/10 16.05 1998/12/01 16.2
Selection of designated Atens
Name Year Discoverer A Catalog 1990 Spacewatch (5604) 1992 FE 1992 Robert H. McNaught 1998 LINEAR 1989 Christian Pollas 1998 LINEAR 1998 LINEAR 66391 Moshup 1999 LINEAR 1999 LINEAR 2001 LINEAR 1998 LINEAR 1999 LINEAR 1999 LONEOS 2000 LINEAR 2000 LINEAR 2000 LINEAR 2000 LINEAR 2001 LINEAR 1998 BAO Schmidt CCD Asteroid Program 1989 Carolyn S. Shoemaker, Eugene M. Shoemaker 2000 LINEAR 2002 LINEAR 2003 LINEAR 2004 FH 2004 LINEAR 2004 LINEAR 2013 Spacewatch, James V. Scotti 2013 Pan-STARRS 2014 NEOWISE 2014 EURONEAR (A) LINEAR: Lincoln Near-Earth Asteroid Research
Record-holding Atens
The following is a list of current records for Aten asteroids
Discovery Records Record Object Date First Detected 5 December 1954 First Confirmed 2062 Aten 7 January 1976 Physical Records Record Object Absolute magnitude Diameter Brightest 14.5 4.3 km Brightest 14.7 3.6 km Brightest 3753 Cruithne 15.1 3.3 km Smallest 3362 Khufu 18.3 700 m Dimmest 29.1 5 m Dimmest 19.9 505 m Dimmest 2340 Hathor 19.2 210 m Orbital Records Perihelion Records Object q (AU) notes Smallest 0.092 smallest of all asteroids Smallest 2340 Hathor 0.464 Largest 2062 Aten 0.790 Largest 0.984 Earth Co-Orbital Semi-Major Axis Records Object a (AU) notes Smallest 0.610 Smallest 66391 Moshup 0.642 Smallest 2100 Ra-Shalom 0.832 Largest 3753 Cruithne 0.998 Earth Co-Orbital Largest 0.999 In Earth's Zone of Influence Aphelion Records Object Q (AU) notesSmallest 0.973 Apohele asteroid, smallest of all asteroidsSmallest 1.019 smallest of all numbered asteroids Smallest 2062 Aten 1.143 smallest of all named asteroids Largest 3753 Cruithne 1.511 Earth Co-Orbital Largest 1.705 In Earth's Zone of Influence, Binary Eccentricity Records Object e notes Smallest 0.013 Earth Co-Orbital Smallest 2062 Aten 0.183 Largest 3753 Cruithne 0.515 Earth Co-Orbital Largest 0.895 Inclination Records Object i (deg) notes Smallest 2004 FH 0.0° Smallest (65679) 1989 UQ 1.3° Smallest 2340 Hathor 5.9° Largest 5381 Sekhmet 49.0° Largest 53.3°
References
External links List of Aten Minor Planets