Vanth

Key facts

Discovered by

Michael E. Brown Terry-Ann Suer

Discovery date

13 November 2005

Designation

(90482) Orcus I

Pronunciation

/ ˈ v æ n θ /

Named after

Vanth

Adjectives

Vanthian

Semi major axis

8 999 .8 ± 9.1 km

Eccentricity

0.000 91 ± 0.000 53

Orbital period sidereal

9.539 154 ± 0.000 020 d

Inclination

105.03 ° ± 0.18 ° (to celestial equator ), 90.54° ± 0.17° (to ecliptic )

Longitude of ascending node

53.49° ± 0.33°

Argument of periapsis

274.51°

Satellite of

Orcus

Mean diameter

442.5 ± 10.2 km ( occultation ) , 475 ± 75 km ( thermal )

Mass

(8.7 ± 0.8) × 10 kg

Mean density

≈1.9 ± 0.3 g/cm (occultation) , 1.5 +1.0, −0.5 g/cm (thermal)

Synodic rotation period

synchronous

Albedo

0.08 ± 0.02

via Wikipedia infobox