Asteroids with Satellites Database--Johnston's Archive

(229762) 2007 UK126

compiled by Wm. Robert Johnston
last updated 10 May 2014
under construction--testing upgrades!

--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, scattered disk


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 74.158 AU
orbital period P: 638.627 yr (= 233258.7 d)
eccentricity e: 0.49374
perihelion distance q: 37.5437 AU
aphelion distance Q: 110.773 AU
inclination i: 23.340295°
argument of perihelion ω: 346.144°
ascending node Ω: 131.28692°
mean anomaly M: 342.106°
perihelion passage TP: 2046 Feb 18
Epoch: 2014 May 23
data arc: 1982-2013 (73 obs.)
Earth MOID: 36.5641 AU
Jupiter Tisserand invariant TJ: 6.099
Neptune Tisserand invariant TN:2.91 [*D]


orbital data, secondary:
semimajor axis as: 3600 ± 1300 km (separation) [G12b]
separation/primary radius as/rp:12 [*E]
separation/Hill radius as/rH:0.0024 [*E]
orbital period Ps: 5.9 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 3.4 [MPC]
3.68 ± 0.03 [*G11a]
slope parameter G: 0.15 [*A]
effective diameter dE: 599 ± 77/77 km [S12a]
geometric albedo: 0.167 ± 0.058/0.038 [S12a]
color index U-B: ?
color index B-V: ?
color index V-R:0.62± 0.05 [?]
taxonomic type: ?
mass m: ?
density ρ: 1 g/cm3 [*A]
Hill radius rH: 1500000 km [*E]

other data, primary:
diameter dp: 590 ± 76 km [*D]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction : ? ; ?


other data, secondary:
diameter ds: 103 km [*D]
diameter ratio ds/dp: 0.175 [G12b]
component mag. difference ΔM: 3.79 [*G11a]
rotation period RPs: ?

-- (229762) 2007 UK126 --discovery and notes:

Primary discovered 2007 Oct 19 from Palomar Observatory, California, USA by ?. . Linked to prediscovery observations from 1982 Aug 16. Permanent number assigned 2009 Dec 31.

Companion discovered 2008 Nov 13 using HST observations from Hubble Space Telescope. Announced 2011.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2011, 2014 by Wm. Robert Johnston.
Last modified 10 May 2014.
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