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Asteroids with Satellites Database--Johnston's Archive

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:	44.0983 AU
orbital periodP:	292.847 yr (= 106962.2 d)
eccentricitye:	0.04558
perihelion distanceq:	42.0884 AU
aphelion distanceQ:	46.1081 AU
inclinationi:	1.15464°
argument of perihelionω:	104.96°
ascending nodeΩ:	15.389°
mean anomalyM:	14.21°
perihelion passageT_P:	2002 Nov 01
Epoch:	2014 May 23
data arc:	2006-2011(29 obs.)
Earth MOID:	41.1044 AU
Jupiter Tisserand invariantT_J:	5.933
Neptune Tisserand invariantT_N:	3.10 [*D]

orbital data, secondary:

semimajor axisa_s:	25300± 300 km[P11a]
separation/primary radiusa_s/r_p:	560 [*D]
separation/Hill radiusa_s/r_H:	0.088 [*D]
orbital periodP_s:	1501± 12.8d [P11a]
eccentricitye_s:	0.28± 0.01[P11a]
inclinationi_s:	55.6° ± 1.35° [P11a]
ascending nodeΩ_s:	41° ± 2° [P11a]
argument of pericenterω_s:	14° ± 1° [P11a]
mean anomalyM:	219° ± 1° [P11a]
Epoch:	2009 Nov 17.58
normalized ang. mom.α_L:	?

other data, system (combined):

other data, primary:

diameterd_p:	89.8± 0.8/1 km [P11a]
rotation periodRP_p:	?
amplitude in mag., rotationalΔM:	?
pole directionΒ, λ:	?,?

other data, secondary:

-- 2006 BR284 --discovery and notes:

Primary discovered2006 Jan 31from Mauna Kea Observatory, Hawaii, USAby ?.

Companion discovered2006 Jan 31usingimaging observations.Announced2011 Aug 11.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

Parker, A., Kavelaars, J., Petit, J.-M., Jones, L., Smith, P., Gladman, B., Vanlaerhoven, C., Nicholson, P., Parker, J. W., Bieryla, A., Dell'Antonio, I., Becker, A., Wittman, D., & Williams, G. V. 2011, Minor Planet Electronic Circulars2006 BR284 and 2006 JZ81

©2011-2012, 2014by Wm. Robert Johnston.
Last modified20 September 2014.
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