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Asteroids with Satellites Database--Johnston's Archive
(2121) Sevastopol
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
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 2.183210944 AU | | orbital periodP: | 3.225906323 yr
(= 1178.262285 d) | | eccentricitye: | 0.178710897 | | perihelion distanceq: | 1.793047358 AU | | aphelion distanceQ: | 2.57337453 AU | | inclinationi: | 4.376485398° | | argument of perihelionω: | 159.9851173° | | ascending nodeΩ: | 145.7322062° | | mean anomalyM: | 88.85494882° | | perihelion passageTP: | 2013 Aug 05.18212 | | Epoch: | 2014 May 23 | | data arc: | 1936-2014(1413 obs.) | | Earth MOID: | 0.777982 AU | | Jupiter Tisserand invariantTJ: | 3.654 |
orbital data, secondary: | semimajor axisas: | 26 km[*E] | | separation/primary radiusas/rp: | 6.0 [*E] | | separation/Hill radiusas/rH: | 0.02 [*E] | | orbital periodPs: | 1.546d [H10a] | | eccentricityes: | <0.03[P16d] | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 12.1[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 9.32± 0.04 km [M11b] | | geometric albedo: | 0.248± 0.022[M11b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 1200 km [*E] |
other data, primary: | diameterdp: | 8.62± 0.08 km [*D] | | rotation periodRPp: | 2.9064± 0.00002h [H10a] | | amplitude in mag., rotationalΔM: | 0.2 [H10a] | | amplitude in mag., mutual eventsΔM: | 0.2 [H10a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 3.54± 0.17km [*D] | | diameter ratiods/dp: | 0.41± 0.02 [H10a] | | component mag. differenceΔM: | 1.94± 0.11 [*D] | | rotation periodRPs: | ? | |
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--(2121) Sevastopol --discovery and notes:
Primary discovered1971 Jun 27from Nauchnyj, Crimea, Ukraine, USSRby T. M. Smirnova.Alternate designation(s):1971 ME, 1932 HM, 1936 WD, 1938 DY, 1939 TO, 1952 SZ, 1968 QJ1, 1977 ED2, 1978 WG.Linked to prediscovery observations from 1936 Nov 17.Permanent number assigned -.
Named 1983 Jan 28 for the city of Sevastopol, Crimea, Ukraine [MPC007616].
Companion discovered2010 Jul 23 by D. Higgins, P. Pravec, P. Kusnirak, J. Pollock, J. Oey, M. Husarik, G. Cervak, D. E. Reichart, K. M. Ivarsen, J. B. Haislip, and A. LaCluyzeusinglightcurve observations from Canberra, Australia; Ondrejov Observatory, Czech Republic; Appalachian State University, North Carolina, USA; Leura, New South Wales, Australia; Skalnate Pleso Observatory; University of North Carolina, Chapel Hill.Announced2010 Aug 26 [H10a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Higgins, D., Pravec, P., Kusnirak, P., Pollock, J., Oey, J., Husarik, M., Cervak, G., Reichart, D. E., Ivarsen, K. M., Haislip, J. B., & Lacluyze, A. 2010, Central Bureau Electronic Telegrams(2121) Sevastopol
©2010-2014, 2019by Wm. Robert Johnston.
Last modified29 May 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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