(5477)
Asteroids with Satellites Database--Johnston's Archive
(5477) Holmes
compiled by Wm. Robert Johnston
last updated 29 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, Hungaria _orbital data, primary (osculating elements)_[JPL] :semimajor axis **a:**1.917452812 AUorbital period **P:**2.655187713 yr (= 969.8073123 d)eccentricity **e:**0.075236158perihelion distance **q:**1.773191031 AUaphelion distance **Q:**2.061714594 AUinclination **i:**22.54787325°argument of perihelion **ω:**290.3082655°ascending node **Ω:**49.13796957°mean anomaly **M:**135.4358434°perihelion passage **TP:2013 May 23.1481Epoch:2014 May 23data arc:1989-2014 (940 obs.)Earth MOID:**0.841282 AUJupiter Tisserand invariant **TJ:3.832 orbital data, secondary: binary dynamical type:**A [P07f]semimajor axis **as:**6.7 km [*E]separation/primary radius **as/rp:**4.5 [*E]separation/Hill radius **as/rH:**0.016 [*E]orbital period **Ps:**1.018 ± 0.0008 d [W05a]eccentricity es:<0.05 [P16d]normalized ang. mom. **αL:**1.07 [P07f] | other data, system (combined): absolute mag. **H:**14 [MPC]slope parameter G: (0.15) [*A]effective diameter dE:3.15 ± 0.14 km [M11b]geometric albedo:0.31 ± 0.038 [M11b]color index U-B:?color index B-V:?taxonomic type:?mass m:?density ρ: (1.6 g/cm3) [*A]Hill radius **rH:**410 km [*E] other data, primary: diameter **dp:**2.95 ± 0.13 km [*D]rotation period **RPp:**2.9943 ± 0.0002 h [W05a]amplitude in mag., rotational **ΔM:**0.11 [W05a]amplitude in mag., mutual events **ΔM:**0.18 ±0.04 [W05a]pole direction Β, λ:? , ? other data, secondary: diameter **ds:**1.09 ± 0.08 km [*D]diameter ratio **ds/dp:**0.37 ± 0.02 [W05a]component mag. difference **ΔM:**2.16 ± 0.12 [*D]rotation period RPs:? |
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-- (5477) Holmes --discovery and notes:
Primary discovered 1989 Oct 27 from Palomar Observatory, California, USA by E. F. Helin. Alternate designation(s): 1989 UH2. Permanent number assigned 1993 Mar 08.
Named 2011 Feb 18 for Robert E. Holmes Jr. (1956-) [MPC073983].
Companion discovered 2005 Nov 02 by B. D. Warner, P. Pravec, P. Kusnirak, W. Cooney, J. Gross, D. Terrell, D. Higgins, L. Kornos, J. Vilagi, D. Pray, G. Masi, and F. Mallia using lightcurve observations from Palmer Divide Observatory, Colorado Springs; Ondrejov Observatory, Czech Republic; Sonoita Research Observatory, Sonoita, Arizona, USA; Ngunnawal, Canberra, Australia; Modra Observatory, Slovakia; Greene, Rhode Island, USA; Universita degli Studi di Roma "Tor Vergata"; Campo Catino, Italy. Announced 2005 Nov 15 [W05a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D., Stephens, Robert D., & Coley Daniel 2012, Minor Planet Bulletin Lightcurve for the Hungaria Binary 5477 Holmes
- Warner, Brian D., Pravec, Petr, Kusnirak, Peter, Harris, Alan W., Cooney, Walter R., Jr., Gross, John, Terrell, Dirk, Nudds, Shannon, Vilagi, Josef, Gajdos, Stefan, Masi, Gianluca, Pray, Donald P., Dyvig, Ron, & Reddy, Vishnu 2011, Minor Planet Bulletin Lightcurves from the Initial Discovery of Four Hungaria Binary Asteroids
- Warner, B. D., Pravec, P., Kusnirak, P., Cooney, W., Gross, J., Terrell, D., Higgins, D., Kornos, L., Vilagi, J., Pray, D., Masi, G., & Mallia, F. 2005, Central Bureau Electronic Telegrams (5477) 1989 UH_2
© 2005-2014, 2019 by Wm. Robert Johnston.
Last modified 29 May 2019.
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