Asteroids with Satellites Database--Johnston's Archive

(4492) Debussy

compiled by Wm. Robert Johnston
last updated 21 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


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.765983837 AU
orbital period P: 4.600262977 yr
(= 1680.246052 d)
eccentricity e: 0.180358464
perihelion distance q: 2.26711524 AU
aphelion distance Q: 3.264852434 AU
inclination i: 8.0245664°
argument of perihelion ω: 52.614095°
ascending node Ω: 350.064813°
mean anomaly M: 179.514293°
perihelion passage TP: 2012 Feb 05.1439
Epoch: 2014 May 23
data arc: 1951-2014 (962 obs.)
Earth MOID: 1.2842 AU
Jupiter Tisserand invariant TJ: 3.301


orbital data, secondary:
binary dynamical type:B [P07f]
semimajor axis as: 31 km [*E]
separation/primary radius as/rp:4.2 [*E]
separation/Hill radius as/rH:0.013 [*D]
orbital period Ps: 1.109 ± 0.00004 d [B06a]
eccentricity es: ?
normalized ang. mom. αL: 1.46 [P07f]

other data, system (combined):
absolute mag. H: 12.8 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 17.36 ± 0.7 km [M11b]
geometric albedo: 0.041 ± 0.016 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: 1.88x1015 kg [*D]
density ρ: 0.91 ± 0.1 g/cm3[B06a]
Hill radius rH: 2300 km [*D]

other data, primary:
diameter dp: 14.6 ± 0.59 km [*D]
rotation period RPp: 26.606 ± 0.001 h [B06a]
amplitude in mag., rotational ΔM: 0.48 ± 0.01 [B06a]
amplitude in mag., mutual events ΔM:0.65 ±0.03 [B06a]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 9.39 km [*D]
diameter ratio ds/dp: 0.643 [B06a]
component mag. difference ΔM: 0.96 [*D]
rotation period RPs: ?

-- (4492) Debussy --discovery and notes:

Primary discovered 1988 Sep 17 from Haute Provence, France by E. W. Elst. Alternate designation(s): 1988 SH, 1979 SZ10, 1979 VF1, 1981 EC. Linked to prediscovery observations from 1951 Aug 06. Permanent number assigned 1990 Jun 08.

Named 1990 Oct 04 for Claude Debussy (1862-1918) [MPC17031].

Companion discovered 2002 Oct 30 by R. Behrend, et al. using lightcurve observations. Announced 2004 Jun 15 [B04d].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2004-2006, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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