Back 90 Antiope Afrikaans 90 أنتيوب Arabic 90 أنتيوب (كويكب) ARZ 90 Antiope AST 90 Antiope Azerbaijani (90) Антыёпа Byelorussian (90) Antíope Catalan (90) Антиопа CE Antiope (planetka) Czech (90) Antiope German

90 Antiope

Discovery [1]
Discovered byRobert Luther
Discovery date1 October 1866
Designations
(90) Antiope
Pronunciation/ænˈtaɪəpiː/[1]
1952 BK2[2]
Main belt[2]
(Themis family)
AdjectivesAntiopean
Orbital characteristics[2]
Epoch 23 July 2010
(JD 2455400.5)
Aphelion545.94 Gm
3.6494 AU
Perihelion398.02 Gm
2.6606 AU
471.19 Gm
3.1550 AU
Eccentricity0.15670
2046.9 d (5.60 yr)
16.66 km/s
304.12°
Inclination2.2195°
70.21°
242.96°
Physical characteristics
Dimensions93.0×87.0×83.6 km[3]
87.8 ± 1.0 km[3]
Mass8.3×1017 kg
(whole system)[4]
~ 4.1−4.2 ×1017 kg (components)
Mean density
1.25 ± 0.05 g/cm3 (each)[5]
0.687 d (16.50 h)[6] (synchronous)
0.060[7]
C[8]
8.27 (together)[2]
9.02 (each component)
S/2000 (90) 1
Discovery[9]
Discovered byW. J. Merline, L. M. Close,
J. C. Shelton, C. Dumas,
F. Menard, C. R. Chapman,
and D. C. Slater
Discovery date10 August 2000[10]
Designations
Main belt (Themis family)
Orbital characteristics[4]
171 ± 1 km
Eccentricity<0.006
0.687713 ± 0.00004 d (16.5051 ± 0.0001 h)
18.0 m/s
Satellite ofBinary with 90 Antiope
Physical characteristics
Dimensions89.4×82.8×79.6 km[3]
83.8 ± 1.0 km[3]
Mass~ 8.1−8.5 ×1017 kg[5]
Equatorial escape velocity
variable; ~ 35−40 m/s
0.687 d (16.50 h)[6] (synchronous)
9.02

90 Antiope is a double asteroid in the outer asteroid belt. It was discovered on 1 October 1866, by Robert Luther. In 2000, it was found to consist of two almost-equally-sized bodies orbiting each other. At average diameters of about 88 km and 84 km, both components are among the 500 largest asteroids. Antiope is a member of the Themis family of asteroids that share similar orbital elements.[11]

  1. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  2. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference johnston was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Marchis was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Des07 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference MicBarVel04 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference IRAS was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference PDS tax was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference IAUC7503 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Keck2000 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Moore2011 was invoked but never defined (see the help page).

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