Asteroids with Satellites Database--Johnston's Archive

(511551) 2014 UD225

compiled by Wm. Robert Johnston
last updated 17 August 2019

--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: 43.2812 AU
orbital period P: 284.75 yr
(= 104003.5 d)
eccentricity e: 0.13251
perihelion distance q: 37.546 AU
aphelion distance Q: 49.0165 AU
inclination i: 3.65764°
argument of perihelion ω: 294.321°
ascending node Ω: 343.3171°
mean anomaly M: 98.416°
perihelion passage TP: 1941 Jun 22.9
Epoch: 2019 Apr 27
data arc: 2000-2017 (66 obs.)
Earth MOID: 36.5308 AU
Jupiter Tisserand invariant TJ: 5.826

orbital data, secondary:
semimajor axis as: 21400 ± 600 km (separation) [F17a]
separation/primary radius as/rp:230 [*E]
separation/Hill radius as/rH:0.039 [*E]
orbital period Ps: 460 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.7 [MPC]
7 ± 0.5 [G19c]
slope parameter G: (0.15) [*A]
effective diameter dE: 201 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: 550000 km [*E]

other data, primary:
diameter dp: 190 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 66 km [*E]
diameter ratio ds/dp: 0.35 ± 0.01 [F17a]
component mag. difference ΔM: 2.3 [*D]
rotation period RPs: ?

-- (511551) 2014 UD225 --discovery and notes:

Primary discovered 2013 Aug 08 from Mauna Kea Observatory, Hawaii, USA by Outer Solar System Origins Survey. Linked to prediscovery observations from 2000 Sep 21. Permanent number assigned 2018 Jan 31.

Companion discovered by Fraser, W. C., et al. using adaptive optics telescope observations. Announced 2017 Apr 04 [F17a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2019 by Wm. Robert Johnston.
Last modified 17 August 2019.
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