List of Aten asteroids

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This is a list of Aten asteroids, a group of near-Earth objects. As of January 2017, there are 1125 known Atens,[1] most of which remain provisionally designated without a number,[2] 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[edit]

As of August 2015, a total of twelve 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
99942 Apophis 2004 Roy Tucker, David J. Tholen i Fabrizio Bernardi
163693 Atira 2003 LINEAR
367943 Duende 2012 Observatorio Astronómico de La Sagra (OAM)

The February 15, 2013 Earth encounter shortened 367943 Duende orbital period to about 317 days, changing its orbital class from Apollo to Aten.[3]

Brightest Atens[edit]

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
(66146) 1998 TU3 1998/10/13 14.5 3–7 list entry
(137170) 1999 HF1 1999/04/20 14.5 3–7 list entry
3753 Cruithne 1986/10/10 15.6 2–5 list entry
(152931) 2000 EA107 2000/03/15 15.8 2–4 list entry
(105140) 2000 NL10 2000/07/10 15.8 2–4 list entry
3554 Amun 1986/03/04 15.82 2.33–2.82 list entry
(87684) 2000 SY2 2000/09/20 16.0 2–4 list entry
2100 Ra-Shalom 1978/09/10 16.05 2.05–2.59 list entry
(96590) 1998 SB 1998/12/01 16.2 1–3 list entry

Selection of designated Atens[edit]

Name Year Discoverer A Catalog
(5590) 1990 VA 1990 Spacewatch list entry
(5604) 1992 FE 1992 Robert H. McNaught list entry
(33342) 1998 WT24 1998 LINEAR list entry
(65679) 1989 UQ 1989 Christian Pollas list entry
(66063) 1998 RO1 1998 LINEAR list entry
(66146) 1998 TU3 1998 LINEAR list entry
(66391) 1999 KW4 1999 LINEAR list entry
(66400) 1999 LT7 1999 LINEAR list entry
(68347) 2001 KB67 2001 LINEAR list entry
(85770) 1998 UP1 1998 LINEAR list entry
(85953) 1999 FK21 1999 LINEAR list entry
(85989) 1999 JD6 1999 LONEOS list entry
(86450) 2000 CK33 2000 LINEAR list entry
(86667) 2000 FO10 2000 LINEAR list entry
(87309) 2000 QP 2000 LINEAR list entry
(87684) 2000 SY2 2000 LINEAR list entry
(88213) 2001 AF2 2001 LINEAR list entry
(96590) 1998 XB 1998 BAO Schmidt CCD Asteroid Program list entry
(99907) 1989 VA 1989 Carolyn S. Shoemaker, Eugene M. Shoemaker list entry
(137924) 2000 BD19 2000 LINEAR list entry
2002 AA29 2002 LINEAR MPC
2003 YN107 2003 LINEAR MPC
2004 FH 2004 LINEAR MPC
2004 FU162 2004 LINEAR MPC
2013 BS45 2013 Spacewatch, James V. Scotti MPC
2013 ND15 2013 Pan-STARRS MPC
2014 HQ124 2014 NEOWISE MPC
2014 OL339 2014 EURONEAR MPC
(A) LINEAR: Lincoln Near-Earth Asteroid Research

Record-holding Atens[edit]

The following is a list of current records for Aten asteroids

Discovery Records
Record Object Date
First Detected (363505) 2003 UC20 5 December 1954
First Confirmed 2062 Aten 7 January 1976
Physical Records
Record Object Absolute magnitude Diameter
Brightest (137170) 1999 HF1 14.5 4.3 km
Brightest (numbered) (66146) 1998 TU3 14.7 3.6 km
Brightest (named) 3753 Cruithne 15.1 3.3 km
Smallest (named) 3362 Khufu 18.3 700 m
Dimmest 2003 SW130 29.1 5 m
Dimmest (numbered) (68347) 2001 KB67 19.9 505 m
Dimmest (named) 2340 Hathor 19.2 210 m
Orbital Records
Perihelion Records Object q (AU) notes
Smallest (137924) 2000 BD19 0.092 smallest of all asteroids
Smallest (named) 2340 Hathor 0.464
Largest (numbered) 2062 Aten 0.790
Largest 2002 AA29 0.984 Earth Co-Orbital
Semi-Major Axis Records Object a (AU) notes
Smallest (434326) 2004 JG6 0.635 Apohele asteroid, smallest of all asteroids
Smallest (numbered) (66391) 1999 KW4 0.642
Smallest (named) 2100 Ra-Shalom 0.832
Largest (numbered) 3753 Cruithne 0.998 Earth Co-Orbital
Largest (85770) 1998 UP1 0.999 In Earth's Zone of Influence
Aphelion Records Object Q (AU) notes
Smallest (434326) 2004 JG6 0.973 Apohele asteroid, smallest of all asteroids
Smallest (numbered) (33342) 1998 WT24 1.019 smallest of all numbered asteroids
Smallest (named) 2062 Aten 1.143 smallest of all named asteroids
Largest (named) 3753 Cruithne 1.511 Earth Co-Orbital
Largest (66063) 1998 RO1 1.705 In Earth's Zone of Influence, Binary
Eccentricity Records Object e notes
Smallest 2002 AA29 0.013 Earth Co-Orbital
Smallest (numbered) 2062 Aten 0.183
Largest (named) 3753 Cruithne 0.515 Earth Co-Orbital
Largest (137924) 2000 BD19 0.895
Inclination Records Object i (deg) notes
Smallest 2004 FH 0.0°
Smallest (numbered) (65679) 1989 UQ 1.3°
Smallest (named) 2340 Hathor 5.9°
Largest (numbered) 5381 Sekhmet 49.0°
Largest (333889) 1998 SV4 53.3°

References[edit]

  1. ^ "Near-Earth Asteroid Discovery Statistics". 5 January 2017. Retrieved 7 January 2017. 
  2. ^ "List Of Aten Minor Planets (by designation)". Minor Planet Center. Retrieved 7 January 2017. 
  3. ^ Paul Chodas and Don Yeomans (1 February 2013). "Asteroid 2012 DA14 To Pass Very Close to the Earth on February 15, 2013". NASA/JPL Near-Earth Object Program Office. Retrieved 17 February 2013. 

External links[edit]