(2825)

Crosby (original) (raw)

Asteroids with Satellites Database--Johnston's Archive

(2825) Crosby

compiled by Wm. Robert Johnston
last updated 27 May 2019

--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 AUorbital period **P:**3.36563697 yr (= 1229.3221204 d)eccentricity **e:**0.173473099perihelion distance **q:**1.85624447 AUaphelion distance **Q:**2.6354289833 AUinclination **i:**3.5211341°argument of perihelion **ω:**81.47056°ascending node **Ω:**329.512063°mean anomaly **M:**69.170053°perihelion passage **TP:2016 Jun 24.799234Epoch:2017 Feb 16data arc:1938-2017 (1599 obs.)Earth MOID:**0.871005 AUJupiter Tisserand invariant **TJ:**3.608 orbital data, secondary: semimajor axis **as:**7.8 km [*E]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) [MPC022496].

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:

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--Links to ADS abstracts:

© 2017, 2019 by Wm. Robert Johnston.
Last modified 27 May 2019.
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