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Asteroids with Satellites Database--Johnston's Archive
(5143) Heracles
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:NEA, Apollo
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.833500481 AU | | orbital periodP: | 2.482731444 yr
(= 906.8176598 d) | | eccentricitye: | 0.772242011 | | perihelion distanceq: | 0.417594382 AU | | aphelion distanceQ: | 3.24940658 AU | | inclinationi: | 9.035561353° | | argument of perihelionω: | 227.7059888° | | ascending nodeΩ: | 309.5669202° | | mean anomalyM: | 337.4331464° | | perihelion passageTP: | 2014 Jul 18.84450 | | Epoch: | 2014 May 23 | | data arc: | 1953-2014(1746 obs.) | | Earth MOID: | 0.0585906 AU | | Jupiter Tisserand invariantTJ: | 3.583 |
orbital data, secondary: | binary dynamical type: | L [M09a] | | semimajor axisas: | 5 km[T17a] | | separation/primary radiusas/rp: | 2.8 [*E] | | separation/Hill radiusas/rH: | 0.043 [*E] | | orbital periodPs: | 0.6458± 0.0625d [T12b] | | eccentricityes: | ? | | normalized ang. mom.αL: | 0.02[M09a] |
| other data, system (combined):| absolute mag.H: | 13.8[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 3.65 km [*D] | | geometric albedo: | 0.4[*E] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | O (SMASSII) [JPL] | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 120 km [*E] |
other data, primary: | diameterdp: | 3.6± 1.2 km [T12b] | | rotation periodRPp: | 2.706± 0.001h [P12a] | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.6± 0.3km [T12b] | | diameter ratiods/dp: | 0.167± 0.1 [*D] | | component mag. differenceΔM: | 3.9 [*D] | | rotation periodRPs: | ? | |
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--(5143) Heracles --discovery and notes:
Primary discovered1991 Nov 07from Palomar Observatory, California, USAby C. S. Shoemaker.Alternate designation(s):1991 VL, 1962 PG.Linked to prediscovery observations from 1953 Nov 30.Permanent number assigned 1992 Mar 18.
Named 1992 Jul 14 for the Greek mythological character [MPC020523].
Companion discovered2011 Dec 10 by P. A. Taylor, M. C. Nolan, and E. S. Howellusingradar observations from Arecibo Observatory, Puerto Rico.Announced2012 Jul 13 [T12b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Pilcher, Frederick, Briggs, John W., Franco, Lorenzo, Inasaridze, Raguli Ya., Krugly, Yurij N., Molotiv, Igor E., Klinglesmith, Daniel A., III, Pollock, Joe, & Pravec, Petr 2012, Minor Planet BulletinRotation Period Determination for 5143 Heracles
- Taylor, P. A., Nolan, M. C., & Howell, E. S. 2012, Central Bureau Electronic Telegrams(5143) Heracles
- Shestopalov, D. I., McFadden, L. A., & Golubeva, L. F. 2007, IcarusExploration of faint absorption bands in the reflectance spectra of the asteroids by method of optimal smoothing: Vestoids
- Skiff, B. A., Buie, M. W., & Bowell, E. 1996, Bulletin of the American Astronomical SocietyNear-Earth Asteroid Physical Observations: 1993-1995
- Binzel, R. P. & Xu, S. 1992, International Astronomical Union Circular1991 VK, 1991 VL, 1991 WA and 1991 XB
©2012-2014, 2019by Wm. Robert Johnston.
Last modified29 May 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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