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Asteroids with Satellites Database--Johnston's Archive
(182933) 2002 GZ31
compiled by Wm. Robert Johnston
last updated20 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:TNO, scattered disk
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 50.378 AU | | orbital periodP: | 357.575 yr
(= 130604.4 d) | | eccentricitye: | 0.23863 | | perihelion distanceq: | 38.3564 AU | | aphelion distanceQ: | 62.399 AU | | inclinationi: | 1.05431° | | argument of perihelionω: | 164.134° | | ascending nodeΩ: | 117.273° | | mean anomalyM: | 334.391° | | perihelion passageTP: | 2039 Oct 29 | | Epoch: | 2014 May 23 | | data arc: | 2002-2008(68 obs.) | | Earth MOID: | 37.3394 AU | | Jupiter Tisserand invariantTJ: | 6.146 | | Neptune Tisserand invariantTN: | 3.11 [*D] |
orbital data, secondary: | semimajor axisas: | 2060± 270 km (separation) [N07c] | | separation/primary radiusas/rp: | 21 [*E] | | separation/Hill radiusas/rH: | 0.0038 [*E] | | orbital periodPs: | 12d [*E] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 6.4[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 231 km [*E] | | geometric albedo: | (0.09) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1 g/cm3) [*A] | | Hill radiusrH: | 540000 km [*E] |
other data, primary: | diameterdp: | 195 km [*E] | | rotation periodRPp: | ? | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 123km [*E] | | diameter ratiods/dp: | 0.631± 0.058 [N08c] | | component mag. differenceΔM: | 1.0 [I8815] | | rotation periodRPs: | ? | |
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--(182933) 2002 GZ31 --discovery and notes:
Primary discovered2002 Apr 06from Cerro Tololo Observatory, La Serena, Chileby M. W. Buie.Permanent number assigned 2008 Apr 20.
Companion discovered2006 Apr 23 by K. S. Noll, W. M. Grundy, S. D. Kern, H. F. Levison, and D. C. StephensusingHubble Space Telescope observations from Hubble Space Telescope.Announced2007 Feb 28 [N07c].
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--Links to ADS abstracts:
©2007-2008, 2014by Wm. Robert Johnston.
Last modified20 September 2014.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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