Asteroids with Satellites Database--Johnston's Archive

(160256) 2002 PD149

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: 42.903 AU
orbital period P: 281.017 yr
(= 102641.6 d)
eccentricity e: 0.06433
perihelion distance q: 40.143 AU
aphelion distance Q: 45.662 AU
inclination i: 4.90931°
argument of perihelion ω: 37.72°
ascending node Ω: 103.652°
mean anomaly M: 223.80°
perihelion passage TP: 2120 Sep 16
Epoch: 2014 May 23
data arc: 2000-2007 (18 obs.)
Earth MOID: 39.1574 AU
Jupiter Tisserand invariant TJ: 5.831
Neptune Tisserand invariant TN:3.08 [*D]


orbital data, secondary:
semimajor axis as: 24400 ± 300 km (separation) [N07a]
separation/primary radius as/rp:260 [*E]
separation/Hill radius as/rH:0.042 [*E]
orbital period Ps: 470 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.3 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 242 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: 580000 km [*E]

other data, primary:
diameter dp: 186 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 155 km [*E]
diameter ratio ds/dp: 0.832 [N07a]
component mag. difference ΔM: 0.4 [I8866]
rotation period RPs: ?

-- (160256) 2002 PD149 --discovery and notes:

Primary discovered 2002 Aug 10 from Cerro Tololo Observatory, La Serena, Chile by M. W. Buie. Linked to prediscovery observations from 2000 Aug 25. Permanent number assigned 2007 Jul 30.

Companion discovered 2007 May 22 by K. S. Noll, S. D. Kern, W. M. Grundy, D. C. Stephens, and H. F. Levison using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2007 Aug 31 [N07a].

--Links, more technical:

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--Links to ADS abstracts:


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