38083 Rhadamanthus
Trans-Neptunian object
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38083 Rhadamanthus (/rædÉËmænθÉs/, provisional designation 1999 HX11) is a trans-Neptunian object (TNO). It was discovered in 1999 by the Deep Ecliptic Survey. It was originally mistakenly thought to be a plutino.[2][3]
| Discovery | |
|---|---|
| Discovered by | Deep Ecliptic Survey |
| Discovery date | 17 April 1999 |
| Designations | |
| (38083) Rhadamanthus | |
| Pronunciation | /rædÉËmænθÉs/[1] |
Named after | Rhadamanthus |
| 1999 HX11 | |
| TNO[2][3] | |
| Adjectives | Rhadamanthean, Rhadamanthian /rædÉËmænθiÉn/[1] |
| Symbol | .svg){kind=small} (astrological) |
| Orbital characteristics[2][4] | |
| Epoch 20 November 2017 (JD 2458078) | |
| Uncertainty parameter 3 | |
| Observation arc | 5110 days (13.99 yr) |
| Aphelion | 45.139 AU (6.7527 Tm) |
| Perihelion | 32.782 AU (4.9041 Tm) |
| 38.777 AU (5.8010 Tm) | |
| Eccentricity | 0.1546 |
| 241.47 yr (88197.3 d) | |
Average orbital speed | 4.73 km/s |
| 97.148° | |
| 0° 0m 14.46s / day | |
| Inclination | 12.793° |
| 9.9615° | |
| 82.178° | |
| Known satellites | 0 |
| Earth MOID | 32.2253 AU (4.82084 Tm) |
| Jupiter MOID | 28.1835 AU (4.21619 Tm) |
| TJupiter | 5.424 |
| Physical characteristics | |
| Dimensions | 87â276 km[5][6] |
| Temperature | ~ 44 K |
| BâV = 0.650±0.085[7] VâR = 0.527±0.069[7] | |
| 6.81[2] | |
Discovery and naming
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."[8]
Planetary symbols are no longer much used in astronomy, so Rhadamanthus never received a symbol in the astronomical literature. There is no standard symbol for Rhadamanthus used by astrologers either. A Unicode proposal for dwarf planet symbols notes a symbol 
that has been used, but leaves it unexplained.[9]
