Asteroids with Satellites Database--Johnston's Archive

(2825) Crosby

compiled by Wm. Robert Johnston
last updated 19 March 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: 2.245836727 AU
orbital period P: 3.36563697 yr
(= 1229.3221204 d)
eccentricity e: 0.173473099
perihelion distance q: 1.85624447 AU
aphelion distance Q: 2.6354289833 AU
inclination i: 3.5211341°
argument of perihelion ω: 81.47056°
ascending node Ω: 329.512063°
mean anomaly M: 69.170053°
perihelion passage TP: 2016 Jun 24.799234
Epoch: 2017 Feb 16
data arc: 1938-2017 (1599 obs.)
Earth MOID: 0.871005 AU
Jupiter Tisserand invariant TJ: 3.608


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: 0.5979 ± 0.0002 d [P17d]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.2 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 5.06 ± 0.15 km [M11b]
geometric albedo: 0.301 ± 0.039 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 720 km [*E]

other data, primary:
diameter dp: 4.98 ± 0.15 km [*D]
rotation period RPp: 2.8135 ± 0.0002 h [P16d]
amplitude in mag., rotational ΔM: 0.08 [P16d]
amplitude in mag., mutual events ΔM:0.06 ±0.02 [P16d]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >0.9 km [*D]
diameter ratio ds/dp: >0.18 [P16d]
component mag. difference ΔM: 3.7 [*D]
rotation period RPs: ?

-- (2825) Crosby --discovery and notes:

Primary discovered 1938 Sep 19 from Johannesburg, South Africa by C. Jackson. Alternate designation(s): 1938 SD1, 1948 RA, 1972 XA1. Linked to prediscovery observations from 1938 Sep 16. Permanent number assigned 1983.

Named 1993 Sep 01 for Harry Lillis (Bing) Crosby (1903-1977) [MPC22496].

Companion discovered 2017 Feb 17 by D. Pray, P. Pravec, J. Vrastil, K. Hornoch, V. Benishek, W. Cooney, B. Flanagan, B. Pellerin, R. Montaigut, A. Leroy, A. Marchini, R. Papini, F. Salvaggio using lightcurve observations. Announced 2017 Mar 09 [P17d].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2017 by Wm. Robert Johnston.
Last modified 19 March 2017.
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