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Asteroids with Satellites Database--Johnston's Archive

compiled by Wm. Robert Johnston
last updated17 August 2019

--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:	43.6229 AU
orbital periodP:	288.12 yr (= 105237.3 d)
eccentricitye:	0.07834
perihelion distanceq:	40.2057 AU
aphelion distanceQ:	47.0401 AU
inclinationi:	4.18622°
argument of perihelionω:	271.976°
ascending nodeΩ:	28.992°
mean anomalyM:	72.82°
perihelion passageT_P:	1961 Jan 13.8
Epoch:	2019 Apr 27
data arc:	2003-2016(388 obs.)
Earth MOID:	39.1922 AU
Jupiter Tisserand invariantT_J:	5.877

orbital data, secondary:

semimajor axisa_s:	11300± 450 km (separation) [F17a]
separation/primary radiusa_s/r_p:	120 [*E]
separation/Hill radiusa_s/r_H:	0.017 [*E]
orbital periodP_s:	140d [*E]
eccentricitye_s:	?
normalized ang. mom.α_L:	?

other data, system (combined):

other data, primary:

diameterd_p:	188 km [*E]
rotation periodRP_p:	6.85h [P18f]
amplitude in mag., rotationalΔM:	?
pole directionΒ, λ:	?,?

other data, secondary:

--(506121) 2016 BP81 --discovery and notes:

Primary discovered2016 Jan 27from Keplerby Kepler.Linked to prediscovery observations from 2003 Oct 23.Permanent number assigned 2017 Nov 04.

Companion discovered0 by Fraser, W. C., et al.usingadaptive optics telescope observations.Announced2017 Apr 04 [F17a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

©2019by Wm. Robert Johnston.
Last modified17 August 2019.
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