Asteroids with Satellites Database--Johnston's Archive

1999 RT214

compiled by Wm. Robert Johnston
last updated 20 September 2014

--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: 42.413 AU
orbital period P: 276.218 yr
(= 100888.7 d)
eccentricity e: 0.04394
perihelion distance q: 40.5493 AU
aphelion distance Q: 44.276 AU
inclination i: 2.57932°
argument of perihelion ω: 210.61°
ascending node Ω: 138.0889°
mean anomaly M: 351.29°
perihelion passage TP: 2021 Jan 26
Epoch: 2014 May 23
data arc: 1999-2008 (44 obs.)
Earth MOID: 39.542 AU
Jupiter Tisserand invariant TJ: 5.821
Neptune Tisserand invariant TN:3.08 [*D]


orbital data, secondary:
semimajor axis as: 3310 ± 30 km (separation) [N06b]
separation/primary radius as/rp:66 [*E]
separation/Hill radius as/rH:0.011 [*E]
orbital period Ps: 64 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 7.8 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 121 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: 300000 km [*E]

other data, primary:
diameter dp: 100 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 69 km [*E]
diameter ratio ds/dp: 0.689 ± 0.029 [N08c]
component mag. difference ΔM: 0.8 [N06b]
rotation period RPs: ?

-- 1999 RT214 --discovery and notes:

Primary discovered 1999 Sep 06 from Mauna Kea Observatory, Hawaii, USA by C. A. Trujillo, J. X. Luu, and D. C. Jewitt.

Companion discovered 2006 Jul 25 by K. S. Noll, W. M. Grundy, H. F. Levison, and D. C. Stephens using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2006 Sep 29 [N06b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2006-2008, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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