8.3×1017 kg (whole system)[4] ~ 4.1−4.2 ×1017 kg (components)
Mean density
1.25 ± 0.05 g/cm3 (each)[5]
Synodic rotation period
0.687 d (16.50 h)[6] (synchronous)
Geometric albedo
0.060[7]
Spectral type
C[8]
Absolute magnitude (H)
8.27 (together)[2] 9.02 (each component)
S/2000 (90) 1
Discovery[9]
Discovered by
W. J. Merline, L. M. Close, J. C. Shelton, C. Dumas, F. Menard, C. R. Chapman, and D. C. Slater
Discovery date
August 10, 2000[10]
Designations
Minor planet category
Main belt (Themis family)
Orbital characteristics[4]
Semi-major axis
171 ± 1 km
Eccentricity
<0.006
Orbital period (sidereal)
0.687713 ± 0.00004 d (16.5051 ± 0.0001 h)
Average orbital speed
18.0 m/s
Satellite of
Binary with 90 Antiope
Physical characteristics
Dimensions
89.4×82.8×79.6 km[3]
Mean diameter
83.8 ± 1.0 km[3]
Mass
~ 8.1−8.5 ×1017 kg[5]
Equatorial escape velocity
variable; ~ 35−40 m/s
Synodic rotation period
0.687 d (16.50 h)[6] (synchronous)
Absolute magnitude (H)
9.02
Antiope (minor planet designation: 90 Antiope) is a double asteroid in the outer asteroid belt. It was discovered on October 1, 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]
^Noah Webster (1884) A Practical Dictionary of the English Language
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Antiope (minor planet designation: 90Antiope) is a double asteroid in the outer asteroid belt. It was discovered on October 1, 1866, by Robert Luther...
Atomic number 90: thorium 90Antiope, double asteroid in the outer asteroid belt Audi 90, a compact executive car produced by Audi Saab 90, a compact executive...
up antiope in Wiktionary, the free dictionary. Antiope may refer to: Antiope (Greek myth), several figures in Greek mythology including: Antiope (Amazon)...
a double planet rather than primary and satellite. Asteroids such as 90Antiope are considered double asteroids, but they have not forced a clear definition...
planetesimals eventually break apart during violent collisions, as 4 Vesta and 90Antiope may have, but a few of the largest ones may survive such encounters and...
ratio near unity, i.e., two components of similar mass. They include 90Antiope, 2006 VW139, 2017 YE5 and 69230 Hermes, with average component diameters...
double minor planets. These include binary asteroids 69230 Hermes and 90Antiope and binary Kuiper belt objects (KBOs) 79360 Sila–Nunam and 1998 WW31....
body as a satellite. Good examples of true binary companions are the 90Antiope and the 79360 Sila–Nunam systems. Pluto and its largest moon Charon are...
1890. Two of his discoveries are now known to have unusual properties: 90Antiope, a binary asteroid with equal components, and the extremely slow-rotating...
trinary asteroid 45 Eugenia, and binary 90Antiope. But estimates by Marchis in 2008 suggest a density of only 0.90 g/cm3, suggesting it may be a loosely...
e.g., Alpha Centauri (approx. the same mass) A binary asteroid, e.g., 90Antiope (approx. the same mass) A further simplification is based on the "standard...
worlds, such as Pluto and Charon or the components of binary asteroid 90Antiope, with no terminus disconnect, according to Francis Graham of Kent State...
Retrieved 2 May 2019. Johnston, Wm. Robert (21 September 2014). "(90) Antiope and S/2000 (90) 1". Johnston's Archive. Retrieved 14 June 2019. "JPL Small-Body...
Some of the largest members of this family include: 24 Themis 62 Erato 90Antiope 104 Klymene 171 Ophelia 222 Lucia 223 Rosa 316 Goberta 379 Huenna 383...
were, in ancient Greek mythology, the twin sons of Zeus (or Theobus) by Antiope. They are important characters in one of the two founding myths of the...
ground-based telescopes equipped with adaptive optics systems (45 Eugenia, 90Antiope, 87 Sylvia and 121 Hermione). Up to 50% of the interior volume of Mathilde...
Marchis, F.; et al. (2004). "Fine Analysis of 121 Hermione, 45 Eugenia, and 90Antiope Binary Asteroid Systems With AO Observations". Bulletin of the American...
1051/aas:1999161. Hargrove, Kelsey D.; et al. (July 2015), "Asteroid (90) Antiope: Another icy member of the Themis family?", Icarus, 254: 150–156, Bibcode:2015Icar...
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