Asteroids with Satellites Database--Johnston's Archive

2001 QQ322

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, Cubewano

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 43.930 AU
orbital period P: 291.171 yr
(= 106350.4 d)
eccentricity e: 0.05360
perihelion distance q: 41.575 AU
aphelion distance Q: 46.284 AU
inclination i: 3.957405°
argument of perihelion ω: 353.02°
ascending node Ω: 76.512°
mean anomaly M: 296.45°
perihelion passage TP: 2065 Oct 16
Epoch: 2014 May 23
data arc: 2001-2007 (19 obs.)
Earth MOID: 40.5889 AU
Jupiter Tisserand invariant TJ: 5.907
Neptune Tisserand invariant TN:3.09 [*D]

orbital data, secondary:
semimajor axis as: 3890 ± 90 km (separation) [G12b]
separation/primary radius as/rp:45 [*E]
separation/Hill radius as/rH:0.0068 [*E]
orbital period Ps: 32 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: 570000 km [*E]

other data, primary:
diameter dp: 171 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 156 km [*E]
diameter ratio ds/dp: 0.912 [N08d]
component mag. difference ΔM: 0.2 [N08d]
rotation period RPs: ?

-- 2001 QQ322 --discovery and notes:

Primary discovered 2001 Aug 21 from Cerro Tololo Observatory, La Serena, Chile by M. W. Buie.

Companion discovered 2007 Jun 15 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 2008 Mar 04 [N08d].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

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