Asteroids with Satellites Database--Johnston's Archive

2004 PW117

compiled by Wm. Robert Johnston
last updated 17 August 2019

--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: 43.812 AU
orbital period P: 290 yr
(= 105922.6 d)
eccentricity e: 0.05653
perihelion distance q: 41.335 AU
aphelion distance Q: 46.289 AU
inclination i: 1.86198°
argument of perihelion ω: 76.75°
ascending node Ω: 81.335°
mean anomaly M: 166.95°
perihelion passage TP: 1884 Oct 28.5
Epoch: 2019 Apr 27
data arc: 2004-2013 (19 obs.)
Earth MOID: 40.3456 AU
Jupiter Tisserand invariant TJ: 5.91

orbital data, secondary:
semimajor axis as: 23190 ± 60 km (separation) [G19c]
separation/primary radius as/rp:240 [*E]
separation/Hill radius as/rH:0.037 [*E]
orbital period Ps: 430 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.3 [MPC]
6.9 ± 0.5 [G19c]
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: 630000 km [*E]

other data, primary:
diameter dp: 196 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 141 km [*E]
diameter ratio ds/dp: 0.72 [*D]
component mag. difference ΔM: 0.71 [G19c]
rotation period RPs: ?

-- 2004 PW117 --discovery and notes:

Primary discovered 2004 Aug 15 from Mauna Kea Observatory, Hawaii, USA by B. Gladman.

Companion discovered 2019 Jul 02 using Hubble Space Telescope observations. Announced 2019 Aug [G19c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2019 by Wm. Robert Johnston.
Last modified 17 August 2019.
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