Asteroids with Satellites Database--Johnston's Archive

2003 YU179

compiled by Wm. Robert Johnston
last updated 27 May 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: 46.5414 AU
orbital period P: 317.511 yr
(= 115973 d)
eccentricity e: 0.15548
perihelion distance q: 39.3053 AU
aphelion distance Q: 53.7774 AU
inclination i: 4.86181°
argument of perihelion ω: 326.0992°
ascending node Ω: 126.4757°
mean anomaly M: 31.1404°
perihelion passage TP: 1991 Nov 08.2
Epoch: 2019 Apr 27
data arc: 2003-2018 (28 obs.)
Earth MOID: 38.3231 AU
Jupiter Tisserand invariant TJ: 5.999
Neptune Tisserand invariant TN:3.095 [*D]

orbital data, secondary:
semimajor axis as: 2000 ± 200 km (separation) [G12b]
separation/primary radius as/rp:21 [*E]
separation/Hill radius as/rH:0.0038 [*E]
orbital period Ps: 12 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.5 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 221 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: 530000 km [*E]

other data, primary:
diameter dp: 193 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 106 km [*E]
diameter ratio ds/dp: 0.55 [N09c]
component mag. difference ΔM: 1.3 [N09c]
rotation period RPs: ?

-- 2003 YU179 --discovery and notes:

Primary discovered 2003 Dec 24 from Mauna Kea Observatory, Hawaii, USA by ?.

Companion discovered 2008 Sep 27 by K. S. Noll, W. M. Grundy, S. D. Benecchi, and H. A. Levison using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2009 Sep 27 [N09c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2009-2014, 2019 by Wm. Robert Johnston.
Last modified 27 May 2019.
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