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Asteroids with Satellites Database--Johnston's Archive
(5477) Holmes
compiled by Wm. Robert Johnston
last updated29 May 2019--Orbital and physical data--
(Seethis page for definitions of quantities; source codes in brackets, seethis 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 axisa: | 1.917452812 AU | | orbital periodP: | 2.655187713 yr
(= 969.8073123 d) | | eccentricitye: | 0.075236158 | | perihelion distanceq: | 1.773191031 AU | | aphelion distanceQ: | 2.061714594 AU | | inclinationi: | 22.54787325° | | argument of perihelionω: | 290.3082655° | | ascending nodeΩ: | 49.13796957° | | mean anomalyM: | 135.4358434° | | perihelion passageTP: | 2013 May 23.1481 | | Epoch: | 2014 May 23 | | data arc: | 1989-2014(940 obs.) | | Earth MOID: | 0.841282 AU | | Jupiter Tisserand invariantTJ: | 3.832 |
orbital data, secondary: | binary dynamical type: | A [P07f] | | semimajor axisas: | 6.7 km[*E] | | separation/primary radiusas/rp: | 4.5 [*E] | | separation/Hill radiusas/rH: | 0.016 [*E] | | orbital periodPs: | 1.018± 0.0008d [W05a] | | eccentricityes: | <0.05[P16d] | | normalized ang. mom.αL: | 1.07[P07f] |
| other data, system (combined):| absolute mag.H: | 14[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 3.15± 0.14 km [M11b] | | geometric albedo: | 0.31± 0.038[M11b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 410 km [*E] |
other data, primary: | diameterdp: | 2.95± 0.13 km [*D] | | rotation periodRPp: | 2.9943± 0.0002h [W05a] | | amplitude in mag., rotationalΔM: | 0.11 [W05a] | | amplitude in mag., mutual eventsΔM: | 0.18 ±0.04 [W05a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 1.09± 0.08km [*D] | | diameter ratiods/dp: | 0.37± 0.02 [W05a] | | component mag. differenceΔM: | 2.16± 0.12 [*D] | | rotation periodRPs: | ? | |
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--(5477) Holmes --discovery and notes:
Primary discovered1989 Oct 27from Palomar Observatory, California, USAby 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 discovered2005 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. Malliausinglightcurve 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.Announced2005 Nov 15 [W05a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D., Stephens, Robert D., & Coley Daniel 2012, Minor Planet BulletinLightcurve 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 BulletinLightcurves 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, 2019by Wm. Robert Johnston.
Last modified29 May 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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