Asteroids with Satellites Database--Johnston's Archive

(76818) 2000 RG79

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: main belt asteroid, Hungaria


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.929916718 AU
orbital period P: 2.681118780 yr
(= 979.2786344 d)
eccentricity e: 0.095761448
perihelion distance q: 1.745105099 AU
aphelion distance Q: 2.114728337 AU
inclination i: 18.1352629°
argument of perihelion ω: 129.641218°
ascending node Ω: 292.356934°
mean anomaly M: 18.616876°
perihelion passage TP: 2014 Apr 02.3580
Epoch: 2014 May 23
data arc: 1980-2014 (765 obs.)
Earth MOID: 0.794663 AU
Jupiter Tisserand invariant TJ: 3.848


orbital data, secondary:
binary dynamical type:A [P07f]
semimajor axis as: 5.6 km [*E]
separation/primary radius as/rp:3.1 [*E]
separation/Hill radius as/rH:0.011 [*E]
orbital period Ps: 0.5885 ± 0.00004 d [W09a]
eccentricity es: ?
normalized ang. mom. αL: 0.96 [P07f]

other data, system (combined):
absolute mag. H: 13.7 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 3.84 km [*D]
geometric albedo: 0.43 [*E]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 500 km [*E]

other data, primary:
diameter dp: 3.6 km [P06b]
rotation period RPp: 3.166 ± 0.000 h [W05c]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 1.33 km [*D]
diameter ratio ds/dp: 0.37 ± 0.03 [W05c]
component mag. difference ΔM: 2.2 ± 0.2 [*D]
rotation period RPs: ?

-- (76818) 2000 RG79 --discovery and notes:

Primary discovered 2000 Sep 08 from Socorro, New Mexico, USA by LINEAR. Linked to prediscovery observations from 1980 Feb 20. Permanent number assigned 2004 Feb 06.

Companion discovered 2005 Aug using lightcurve observations. Announced 2005 Aug 30.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2005-2006, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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