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Asteroids with Satellites Database--Johnston's Archive
(162000) 1990 OS
compiled by Wm. Robert Johnston
last updated20 September 2014--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(PHA)
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.678430687 AU | | orbital periodP: | 2.174519563 yr
(= 794.2432702 d) | | eccentricitye: | 0.462390415 | | perihelion distanceq: | 0.902340425 AU | | aphelion distanceQ: | 2.454520949 AU | | inclinationi: | 1.0950767° | | argument of perihelionω: | 21.40535° | | ascending nodeΩ: | 346.63851° | | mean anomalyM: | 317.3414428° | | perihelion passageTP: | 2014 Aug 25.11464 | | Epoch: | 2014 May 23 | | data arc: | 1990-2013(348 obs.) | | Earth MOID: | 0.00910508 AU | | Jupiter Tisserand invariantTJ: | 4.107 |
orbital data, secondary: | semimajor axisas: | 0.6 km (separation) [O03a] | | separation/primary radiusas/rp: | 4.0 [*E] | | separation/Hill radiusas/rH: | 0.028 [*E] | | orbital periodPs: | 0.875± 0.125d [O03a] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 19.3[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 0.3 km [*D] | | geometric albedo: | 0.36[*E] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 21 km [*E] |
other data, primary: | diameterdp: | 0.3± 0.02 km [O03a] | | rotation periodRPp: | 2.536± 0.000h [B03a] | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.05± 0.02km [O03a] | | diameter ratiods/dp: | 0.167± 0.068 [*D] | | component mag. differenceΔM: | 3.9 [* D] | | rotation periodRPs: | ? | |
|
--(162000) 1990 OS --discovery and notes:
Primary discovered1990 Jul 21from Palomar Observatory, California, USAby E. F. Helin.Permanent number assigned 2007 Sep 26.
Companion discovered2003 Nov 05 by S. J. Ostro, M. C. Nolan, L. A. M. Benner, J. D. Giorgini, J. L. Margot, and C. Magriusingradar observations from Arecibo Observatory, Puerto Rico.Announced2003 Nov 10 [O03a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Ostro, S. J., Nolan, M. C., Benner, L. A. M., Giorgini, J. D., Margot, J. L., & Magri, C. 2003, International Astronomical Union Circular1990 OS
- Ostro, S. J., Nolan, M. C., Benner, L. A. M., Giorgini, J. D., Margot, J. L., & Magri, C. 2003, Central Bureau Electronic Telegrams1990 OS
- 1990, Yamamoto CircularMinor planets.
- McNaught, R. H. & Williams, G. V. 2003, Minor Planet Circulars1990 OS
- Green, D. W. E. 1990, International Astronomical Union Circular1990 OS
- Balam, D. D., Tatum, J. B., Gilmore, A. C., & Kilmartin, P. M. 1990, International Astronomical Union Circular1990 OS
- Helin, E., Roman, B., Lawrence, K., Michaud, J., Holt, H. E., & Levy, D. H. 1990, International Astronomical Union Circular1990 OS
©2003-2007, 2014by Wm. Robert Johnston.
Last modified20 September 2014.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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