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Asteroids with Satellites Database--Johnston's Archive
(6244) Okamoto
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: | 2.159377811 AU | | orbital periodP: | 3.173227095 yr
(= 1159.021197 d) | | eccentricitye: | 0.152704068 | | perihelion distanceq: | 1.829632036 AU | | aphelion distanceQ: | 2.489123587 AU | | inclinationi: | 5.399463626° | | argument of perihelionω: | 51.51572002° | | ascending nodeΩ: | 331.3782905° | | mean anomalyM: | 133.6784756° | | perihelion passageTP: | 2013 Mar 18.62170 | | Epoch: | 2014 May 23 | | data arc: | 1933-2014(1202 obs.) | | Earth MOID: | 0.836487 AU | | Jupiter Tisserand invariantTJ: | 3.677 |
orbital data, secondary: | binary dynamical type: | A [L15a] | | semimajor axisas: | 12 km[*E] | | separation/primary radiusas/rp: | 3.9 [*E] | | separation/Hill radiusas/rH: | 0.014 [*E] | | orbital periodPs: | 0.8467± 0.0004d [H06a] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 13.5[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 6.29 km [*E] | | geometric albedo: | (0.16) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 870 km [*E] |
other data, primary: | diameterdp: | 6.1 km [*E] | | rotation periodRPp: | 2.8958± 0.0001h [H06a] | | amplitude in mag., rotationalΔM: | 0.11 [H06a] | | amplitude in mag., mutual eventsΔM: | 0.11 ±0.04 [H06a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 1.53km [*E] | | diameter ratiods/dp: | 0.25± 0.02 [H06a] | | component mag. differenceΔM: | 3.01± 0.17 [*D] | | rotation periodRPs: | ? | |
|
--(6244) Okamoto --discovery and notes:
Primary discovered1990 Aug 20from Geisei, Japanby T. Seki.Alternate designation(s):1990 QF, 1952 SG1, 1987 SL25.Linked to prediscovery observations from 1933 Sep 27.Permanent number assigned 1995 Feb 15.
Named 1998 Jun 10 for Hiroshi Okamoto (1915-) [MPC032093].
Companion discovered2006 Sep 26 by D. Higgins, D. Pray, P. Kusnirak, and P. Pravecusinglightcurve observations from Canberra, Australia; Carbuncle Hill Observatory, Greene, Rhode Island, USA; Ondrejov Observatory, Czech Republic.Announced2006 Oct 19 [H06a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Higgins, D., Pray, D., Kusnirak, P., & Pravec, P. 2006, Central Bureau Electronic Telegrams(6244) Okamoto
©2006-2014, 2019by Wm. Robert Johnston.
Last modified29 May 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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