Asteroids with Satellites Database--Johnston's Archive

(182933) 2002 GZ31

compiled by Wm. Robert Johnston
last updated 20 September 2014

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this 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 axis a: 50.378 AU
orbital period P: 357.575 yr
(= 130604.4 d)
eccentricity e: 0.23863
perihelion distance q: 38.3564 AU
aphelion distance Q: 62.399 AU
inclination i: 1.05431°
argument of perihelion ω: 164.134°
ascending node Ω: 117.273°
mean anomaly M: 334.391°
perihelion passage TP: 2039 Oct 29
Epoch: 2014 May 23
data arc: 2002-2008 (68 obs.)
Earth MOID: 37.3394 AU
Jupiter Tisserand invariant TJ: 6.146
Neptune Tisserand invariant TN:3.11 [*D]

orbital data, secondary:
semimajor axis as: 2060 ± 270 km (separation) [N07c]
separation/primary radius as/rp:21 [*E]
separation/Hill radius as/rH:0.0038 [*E]
orbital period Ps: 12 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.4 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 231 km [*E]
geometric albedo: (0.09 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1 g/cm3) [*A]
Hill radius rH: 540000 km [*E]

other data, primary:
diameter dp: 195 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 123 km [*E]
diameter ratio ds/dp: 0.631 ± 0.058 [N08c]
component mag. difference ΔM: 1.0 [I8815]
rotation period RPs: ?

-- (182933) 2002 GZ31 --discovery and notes:

Primary discovered 2002 Apr 06 from Cerro Tololo Observatory, La Serena, Chile by M. W. Buie. Permanent number assigned 2008 Apr 20.

Companion discovered 2006 Apr 23 by K. S. Noll, W. M. Grundy, S. D. Kern, H. F. Levison, and D. C. Stephens using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2007 Feb 28 [N07c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2007-2008, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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