38083 Rhadamanthus

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.^[2][3]

38083 Rhadamanthus

Discovery
Discovered by	Deep Ecliptic Survey
Discovery date	17 April 1999
Designations
MPC designation	(38083) Rhadamanthus
Pronunciation	/rædəˈmænθəs/[1]
Named after	Rhadamanthus
Alternative designations	1999 HX11
Minor planet category	TNO[2][3]
Adjectives	Rhadamanthean, Rhadamanthian /rædəˈmænθiən/[1]
Symbol	(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)
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° 0m 14.46s / 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[5][6]
Temperature	~ 44 K
Spectral type	B–V = 0.650±0.085[7] V–R = 0.527±0.069[7]
Absolute magnitude (H)	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]