Asteroids with Satellites Database--Johnston's Archive

2001 FL185

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: 44.326 AU
orbital period P: 295.117 yr
(= 107791.7 d)
eccentricity e: 0.07955
perihelion distance q: 40.8000 AU
aphelion distance Q: 47.852 AU
inclination i: 3.560054°
argument of perihelion ω: 69.23°
ascending node Ω: 75.506°
mean anomaly M: 28.88°
perihelion passage TP: 1990 Sep 18
Epoch: 2014 May 23
data arc: 2001-2008 (35 obs.)
Earth MOID: 39.8143 AU
Jupiter Tisserand invariant TJ: 5.925
Neptune Tisserand invariant TN:3.09 [*D]

orbital data, secondary:
semimajor axis as: 1900 ± 400 km (separation) [N08c]
separation/primary radius as/rp:27 [*E]
separation/Hill radius as/rH:0.0046 [*E]
orbital period Ps: 17 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 7.1 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 167 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: 410000 km [*E]

other data, primary:
diameter dp: 142 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 88 km [*E]
diameter ratio ds/dp: 0.617 [G12b]
component mag. difference ΔM: 0.8 ± 0.6 [N08c]
rotation period RPs: ?

-- 2001 FL185 --discovery and notes:

Primary discovered 2001 Mar 26 from Kitt Peak Observatory, Arizona, USA by M. W. Buie.

Companion discovered 2006 Jan 24 using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2007 Mar 14.

--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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