38083 Rhadamanthus

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38083 Rhadamanthus
Discovered byDeep Ecliptic Survey
Discovery date17 April 1999
MPC designation(38083) Rhadamanthus
Pronunciation/ˌrædəˈmænθəs/ RAD-ə-MAN-thəs
Named after
1999 HX11
AdjectivesRhadamanth(e/i)an, Rhadamanthine
Orbital characteristics[1][3]
Epoch 20 November 2017 (JD 2458078)
Uncertainty parameter 3
Observation arc5110 days (13.99 yr)
Aphelion45.139 AU (6.7527 Tm)
Perihelion32.782 AU (4.9041 Tm)
38.777 AU (5.8010 Tm)
241.47 yr (88197.3 d)
4.73 km/s
0° 0m 14.46s / day
Earth MOID32.2253 AU (4.82084 Tm)
Jupiter MOID28.1835 AU (4.21619 Tm)
Physical characteristics
Dimensions87–276 km[4][5]
Temperature~ 44 K
B–V = 0.650±0.085[6]
V–R = 0.527±0.069[6]

38083 Rhadamanthus is a trans-Neptunian object (TNO). It was discovered in 1999 by the Deep Ecliptic Survey. It was originally thought to be a plutino but no longer is.[1][2]

Discovery and naming[edit]

Rhadamanthus was discovered on 17 April 1999 by the Deep Ecliptic Survey.

Rhadamanthus is named after the Greek mythological figure. The name was announced in the circular of the Minor Planet Center of 24 July 2002, which stated "Rhadamanthus was a son of Zeus and Europa. Because of his just and upright life, after death he was appointed a judge of the dead and the ruler of Elysium, a blissfully beautiful area of the Underworld where those favored by the gods spent their life after death. The name was suggested by E. K. Elliot."[7]


  1. ^ a b c d Marc W. Buie (7 June 2008). "Orbit Fit and Astrometric record for 38083". SwRI (Space Science Department). Retrieved 4 October 2015.
  2. ^ a b "MPEC 2006-X45 : Distant Minor Planets". Minor Planet Center & Tamkin Foundation Computer Network. 21 December 2006. Archived from the original on 28 August 2008. Retrieved 18 July 2008.(older provisional Plutino listing)
  3. ^ "JPL Small-Body Database Browser: 38083 Rhadamanthus (1999 HX11)" (2008-06-07 last obs). Retrieved 12 April 2016.
  4. ^ Rhadamanthus Archived 28 June 2006 at the Wayback Machine
  5. ^ "ABSOLUTE MAGNITUDE (H)". NASA/JPL. Retrieved 23 September 2015.
  6. ^ a b Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited". Astronomy and Astrophysics. 546: 20. arXiv:1209.1896. Bibcode:2012A&A...546A.115H. doi:10.1051/0004-6361/201219566. Retrieved 26 September 2019.
  7. ^ "Minor Planet Circulars/Minor Planets and Comets, MPC-46112" (PDF). Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Retrieved 19 April 2015.

External links[edit]