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Asteroids with Satellites Database--Johnston's Archive

2001 FL185

compiled by Wm. Robert Johnston
last updated20 September 2014

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis 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 axisa:44.326 AU
orbital periodP:295.117 yr
(= 107791.7 d)
eccentricitye:0.07955
perihelion distanceq:40.8000 AU
aphelion distanceQ:47.852 AU
inclinationi:3.560054°
argument of perihelionω:69.23°
ascending nodeΩ:75.506°
mean anomalyM:28.88°
perihelion passageTP:1990 Sep 18
Epoch:2014 May 23
data arc:2001-2008(35 obs.)
Earth MOID:39.8143 AU
Jupiter Tisserand invariantTJ:5.925
Neptune Tisserand invariantTN:3.09 [*D]

orbital data, secondary:

semimajor axisas:1900± 400 km (separation) [N08c]
separation/primary radiusas/rp:27 [*E]
separation/Hill radiusas/rH:0.0046 [*E]
orbital periodPs:17d [*E]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:7.1[MPC]
slope parameterG:(0.15) [*A]
effective diameterdE:167 km [*E]
geometric albedo:(0.09) [*A]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:(1 g/cm3) [*A]
Hill radiusrH:410000 km [*E]

other data, primary:

diameterdp:142 km [*E]
rotation periodRPp:?
amplitude in mag., rotationalΔM:?
pole directionΒ, λ:?,?

other data, secondary:

diameterds:88km [*E]
diameter ratiods/dp:0.617 [G12b]
component mag. differenceΔM:0.8± 0.6 [N08c]
rotation periodRPs:?

-- 2001 FL185 --discovery and notes:

Primary discovered2001 Mar 26from Kitt Peak Observatory, Arizona, USAby M. W. Buie.

Companion discovered2006 Jan 24usingHubble Space Telescope observations from Hubble Space Telescope.Announced2007 Mar 14.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


©2007-2008, 2014by Wm. Robert Johnston.
Last modified20 September 2014.
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