Asteroids with Satellites Database--Johnston's Archive

(3623) Chaplin

compiled by Wm. Robert Johnston
last updated 16 July 2017

--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: 2.854300867 AU
orbital period P: yr
(= 1761.359682 d)
eccentricity e: 0.084554316
perihelion distance q: 2.61295741 AU
aphelion distance Q: 3.095644324 AU
inclination i: 3.069854°
argument of perihelion ω: 233.975608°
ascending node Ω: 118.214106°
mean anomaly M: 199.903841°
perihelion passage TP: 2019 Oct 27.29700
Epoch: 2017 Sep 04
data arc: 1952-2017 (2135 obs.)
Earth MOID: 1.60802 AU
Jupiter Tisserand invariant TJ: 3.297


orbital data, secondary:
binary dynamical type:A [L15a]
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 12.1 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 11.1 ± 1.5 km [M12c]
geometric albedo: 0.266 ± 0.097 [M12c]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 2500 km [*E]

other data, primary:
diameter dp: 11.1 ± 1.5 km [M12c]
rotation period RPp: 8.361 h [W14c]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


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

-- (3623) Chaplin --discovery and notes:

Primary discovered 1981 Oct 04 from Nauchnyj, Crimea, Ukraine, USSR by L. G. Karachkina. Alternate designation(s): 1981 TG2, 1952 VK, 1962 WT1, 1971 UM4, 1976 UG1, 1983 CT1, 1988 DY. Linked to prediscovery observations from 1952 Nov 12. Permanent number assigned 1987 May 13.

Named 1988 May 31 for Charles Spencer Chaplin (1889-1977) [MPC13176].

Companion discovered using lightcurve observations. Announced 2008 Oct 12.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2017 by Wm. Robert Johnston.
Last modified 16 July 2017.
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