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38083 Rhadamanthus

Discovery
Discovered by	Deep Ecliptic Survey
Discovery date	17 April 1999
Designations
MPC designation	(38083) Rhadamanthus
Pronunciation	/rædəˈmænθəs/
Named after	Rhadamanthus
Alternative designations	1999 HX11
Minor planet category	TNO
Adjectives	Rhadamanthean, Rhadamanthian /rædəˈmænθiən/
Symbol	(astrological)
Orbital characteristics
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)
Semi-major axis	38.777 AU (5.8010 Tm)
Eccentricity	0.1546
Orbital period (sidereal)	241.47 yr (88197.3 d)
Average orbital speed	4.73 km/s
Mean anomaly	97.148°
Mean motion	0° 0 14.46 / day
Inclination	12.793°
Longitude of ascending node	9.9615°
Argument of perihelion	82.178°
Earth MOID	32.2253 AU (4.82084 Tm)
Jupiter MOID	28.1835 AU (4.21619 Tm)
TJupiter	5.424
Physical characteristics
Dimensions	87–276 km
Temperature	~ 44 K
Spectral type	B–V = 0.650±0.085 V–R = 0.527±0.069
Absolute magnitude (H)	6.81

38083 Rhadamanthus /rædəˈmænθəs/ 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.

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."

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.

References

1. ^ "Rhadamanthus". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
2. ^ Marc W. Buie (7 June 2008). "Orbit Fit and Astrometric record for 38083". SwRI (Space Science Department). Retrieved 4 October 2015.
3. ^ "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)
4. "JPL Small-Body Database Browser: 38083 Rhadamanthus (1999 HX11)" (2008-06-07 last obs). Retrieved 12 April 2016.
5. Rhadamanthus Archived 28 June 2006 at the Wayback Machine
6. "ABSOLUTE MAGNITUDE (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 23 September 2015.
7. ^ 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.
8. "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.
9. Miller, Kirk (26 October 2021). "Unicode request for dwarf-planet symbols" (PDF). unicode.org.

External links

• 38083 Rhadamanthus at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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