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Asteroids with Satellites Database--Johnston's Archive

(90) Antiopeand S/2000 (90) 1

compiled by Wm. Robert Johnston
last updated21 September 2014

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary:main belt asteroid


orbital data, primary (osculating elements)[JPL]:

semimajor axisa:3.154487052 AU
orbital periodP:5.602751053 yr
(= 2046.4048220 d)
eccentricitye:0.163458400
perihelion distanceq:2.63885965 AU
aphelion distanceQ:3.670114457 AU
inclinationi:2.2071403°
argument of perihelionω:244.40561°
ascending nodeΩ:70.04471°
mean anomalyM:188.255621°
perihelion passageTP:2017 Jan 23.27368
Epoch:2014 May 23
data arc:1866-2014(2754 obs.)
Earth MOID:1.62499 AU
Jupiter Tisserand invariantTJ:3.185

orbital data, secondary:

binary dynamical type:O [P07f]
semimajor axisas:171± 1 km[D07a]
separation/primary radiusas/rp:3.9 [*D]
separation/Hill radiusas/rH:0.0084 [*D]
orbital periodPs:0.6877± 0.000004d [D07a]
eccentricityes:0.003± 0.003[D07a]
inclinationis:63.7° ± 2.0° [D07a]
normalized ang. mom.αL:1.24[P07f]
other data, system (combined):
absolute mag.H:8.27[MPC]
slope parameterG:(0.15) [*A]
effective diameterdE:121 km [*D]
geometric albedo:0.062± 0.007[M11b]
color indexU-B:0.317[T95a]
color indexB-V:0.688[T95a]
taxonomic type:C (SMASSII) [JPL]
C (Tholen) [JPL]
massm:8.28x1017 ± 2.2x1016kg [D07a]
densityρ:1.25± 0.05 g/cm3[D07a]
Hill radiusrH:20000 km [*D]

other data, primary:

diameterdp:87.8± 1 km [D07a]
dimensions:93.0 x 87.0 x 83.6km [D07a]
rotation periodRPp:16.5051± 0.0001h [D07a]
amplitude in mag., rotationalΔM:0.7 [D07a]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:83.8± 1.0km [D07a]
dimensions:89.4 x 82.8 x 79.6km [D07a]
diameter ratiods/dp:0.954± 0.016 [*D]
component mag. differenceΔM:<0.1 [G00b]
rotation periodRPs:16.5051± 0.0001h [D07a]

--(90) Antiope and S/2000 (90) 1 --discovery and notes:

Primary discovered1866 Oct 01from Düsseldorf, Germanyby R. Luther.Alternate designation(s): 1952 BK2.Permanent number assigned 1866 Oct 25.

Named 1866 Oct 25 for the Greek mythological character.

Companion discovered2000 Aug 10 by W. J. Merline, L. M. Close, J. C. Shelton, C. Dumas, F. Menard, C. R. Chapman, and D. C. Slaterusingadaptive optics telescope observations from W. M. Keck II Telescope, Mauna Kea, Hawaii, USA.Announced2000 Oct 03 [G00b].Provisional designation S/2000 (90) 1.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


©2001-2008, 2014by Wm. Robert Johnston.
Last modified21 September 2014.
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