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Orcus (dwarf planet)

Orcus (minor-planet number 90482) is a dwarf planet candidate located in the Kuiper belt, with one large moon, Vanth. It has an estimated diameter of 870 to 960 km (540 to 600 mi), comparable to the Inner Solar System dwarf planet Ceres. The surface of Orcus is relatively bright with albedo reaching 23 percent, neutral in color, and rich in water ice.…

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Absolute magnitude (H)
2.31±0.03 (integral), 2.41±0.05
Adjectives
Orcinian /ɔːrˈsɪniən/ (trad.), Orcean /ˈɔːrsiən/ (trad.)
Alternative designations
(90482) Orcus 2004 DW
Aphelion
48.067 AU (7.1907 Tm)
Apparent magnitude
19.1 (opposition)
Argument of perihelion
72.310°

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Orcus (dwarf planet)

Nodes106
Edges105
Triples39
Avg. degree1.98
Density0.018868
Components1

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Orcus (dwarf planet)

Top relations

Spectral type · 4
Orcus (dwarf planet) → (neutral), B–V = 0.68, Prominent water (H 2O-type): 6, V–R = 0.37
Discovered by · 3
Orcus (dwarf planet) → Chad Trujillo, David L. Rabinowitz, Michael E. Brown
Minor planet category · 3
Orcus (dwarf planet) → dwarf planet, plutino, TNO
Absolute magnitude (H) · 1
Orcus (dwarf planet) → 2.31±0.03 (integral), 2.41±0.05
Adjectives · 1
Orcus (dwarf planet) → Orcinian /ɔːrˈsɪniən/ (trad.), Orcean /ˈɔːrsiən/ (trad.)
Alternative designations · 1
Orcus (dwarf planet) → (90482) Orcus 2004 DW
Aphelion · 1
Orcus (dwarf planet) → 48.067 AU (7.1907 Tm)
Apparent magnitude · 1
Orcus (dwarf planet) → 19.1 (opposition)
Argument of perihelion · 1
Orcus (dwarf planet) → 72.310°
Dimensions · 1
Orcus (dwarf planet) → 910+50 −40 km 917±25 km

Important terminology Word statistics

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Important terminology

orcus vanth ice water pluto surface orbit moon ammonia may km methane trans-neptunian large mi system plutino crystalline charon 2004

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Orcus (dwarf planet)Absolute magnitude (H)2.31±0.03 (integral), 2.41±0.051.00infobox
Orcus (dwarf planet)AdjectivesOrcinian /ɔːrˈsɪniən/ (trad.), Orcean /ˈɔːrsiən/ (trad.)1.00infobox
Orcus (dwarf planet)Alternative designations(90482) Orcus 2004 DW1.00infobox
Orcus (dwarf planet)Aphelion48.067 AU (7.1907 Tm)1.00infobox
Orcus (dwarf planet)Apparent magnitude19.1 (opposition)1.00infobox
Orcus (dwarf planet)Argument of perihelion72.310°1.00infobox
Orcus (dwarf planet)Dimensions910+50 −40 km 917±25 km1.00infobox
Orcus (dwarf planet)Discovered byMichael E. Brown1.00infobox
Orcus (dwarf planet)Discovered byChad Trujillo1.00infobox
Orcus (dwarf planet)Discovered byDavid L. Rabinowitz1.00infobox
Orcus (dwarf planet)Discovery date17 February 20041.00infobox
Orcus (dwarf planet)Earliest precovery date8 November 19511.00infobox
Orcus (dwarf planet)Eccentricity0.227011.00infobox
Orcus (dwarf planet)Equatorial escape velocity≈ 0.43 km/s1.00infobox
Orcus (dwarf planet)Equatorial surface gravity≈ 0.2 m/s21.00infobox
Orcus (dwarf planet)Geometric albedo0.231+0.018 −0.0111.00infobox
Orcus (dwarf planet)Inclination20.592°1.00infobox
Orcus (dwarf planet)Known satellites1 (Vanth)1.00infobox
Orcus (dwarf planet)Longitude of ascending node268.799°1.00infobox
Orcus (dwarf planet)Mass(6.348±0.019)×1020 kg (Orcus and Vanth combined) (5.478±0.10)×1020 kg (Orcus only)[a]1.00infobox
Orcus (dwarf planet)Mean anomaly181.735°1.00infobox
Orcus (dwarf planet)Mean density1.4±0.2 g/cm31.00infobox
Orcus (dwarf planet)Mean motion0° 0m 14.472s / day1.00infobox
Orcus (dwarf planet)Minor planet categoryTNO1.00infobox
Orcus (dwarf planet)Minor planet categoryplutino1.00infobox
Orcus (dwarf planet)Minor planet categorydwarf planet1.00infobox
Orcus (dwarf planet)Named afterOrcus1.00infobox
Orcus (dwarf planet)Observation arc68.16 yr (24,894 days)1.00infobox
Orcus (dwarf planet)Orbital period (sidereal)245.19 yr (89,557 days)1.00infobox
Orcus (dwarf planet)Perihelion30.281 AU (4.5300 Tm)1.00infobox

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