Asteroids with Satellites Database--Johnston's Archive

(10498) Bobgent

compiled by Wm. Robert Johnston
last updated 25 May 2024

--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


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.286616681 AU
orbital period P: 3.4577218239 yr
(= 1262.9567487 d)
eccentricity e: 0.259142817
perihelion distance q: 1.694056393 AU
aphelion distance Q: 2.87917696911353 AU
inclination i: 7.962691°
argument of perihelion ω: 152.485014°
ascending node Ω: 163.555944°
mean anomaly M: 3.7345009°
perihelion passage TP: 2017 Aug 21.898575
Epoch: 2017 Sep 04
data arc: 1979-2017 (1281 obs.)
Earth MOID: 0.685221 AU
Jupiter Tisserand invariant TJ: 3.544


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.6 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 2.69 ± 0.78 km [M19a]
geometric albedo: 0.386 ± 0.177 [M19a]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 350 km [*E]

other data, primary:
diameter dp: 2.69 ± 0.78 km [M19a]
rotation period RPp: 3.45556 ± 0.00005 h [P22c]
amplitude in mag., rotational ΔM: 0.52 [P22c]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: ?

-- (10498) Bobgent --discovery and notes:

Primary discovered 1986 Sep 11 from Anderson Mesa Station, Flagstaff, Arizona, USA by E. Bowell. Alternate designation(s): 1986 RG3, 1979 ON16, 1993 SW1. Linked to prediscovery observations from 1979 Jul 31. Permanent number assigned 1999 May 04.

Named 2000 May 23 for Robert Gent (1947-) [MPC040704].

Companion discovered 2017 Aug 01 by J. Oey and D. Pray using lightcurve observations from Leura Observatory, Leura, New South Wales, Australia; Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA. Announced 2017 Sep 25 [P17k].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2024 by Wm. Robert Johnston.
Last modified 25 May 2024
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