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Asteroids with Satellites Database--Johnston's Archive
(1089) Tama
compiled by Wm. Robert Johnston
last updated21 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:main belt asteroid
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 2.213775091 AU | | orbital periodP: | 3.293885112 yr
(= 1203.0915370 d) | | eccentricitye: | 0.127502720 | | perihelion distanceq: | 1.931512745 AU | | aphelion distanceQ: | 2.496037438 AU | | inclinationi: | 3.7266981° | | argument of perihelionω: | 354.353642° | | ascending nodeΩ: | 71.499243° | | mean anomalyM: | 83.705140° | | perihelion passageTP: | 2013 Aug 16.26403 | | Epoch: | 2014 May 23 | | data arc: | 1904-2014(1551 obs.) | | Earth MOID: | 0.944211 AU | | Jupiter Tisserand invariantTJ: | 3.642 |
orbital data, secondary: | binary dynamical type: | B [P07f] | | semimajor axisas: | 20.7± 1.3 km[B06a] | | separation/primary radiusas/rp: | 1.95 [B06a] | | separation/Hill radiusas/rH: | 0.014 [*D] | | orbital periodPs: | 0.6852± 0.00004d [B06a] | | eccentricityes: | ? | | normalized ang. mom.αL: | 1.28[P07f] |
| other data, system (combined):| absolute mag.H: | 11.7[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 12.92± 0.6 km [T04c] | | geometric albedo: | 0.242± 0.023[T04c] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | 8.9x1014 ± 3.2x1014kg [B06a] | | densityρ: | 2.52± 0.3 g/cm3[B06a] | | Hill radiusrH: | 1500 km [*D] |
other data, primary: | diameterdp: | 10.7± 0.5 km [*D] | | rotation periodRPp: | 16.444± 0.001h [B06a] | | amplitude in mag., rotationalΔM: | 0.41± 0.01 [B06a] | | amplitude in mag., mutual eventsΔM: | 0.55 ±0.03 [B06a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 7.33km [*D] | | diameter ratiods/dp: | 0.685 [B06a] | | component mag. differenceΔM: | 0.82 [*D] | | rotation periodRPs: | ? | |
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--(1089) Tama --discovery and notes:
Primary discovered1927 Nov 17from Tokyo, Japanby O. Oikawa.Alternate designation(s):1927 WB, 1930 ST, 1952 HE4, A894 VA, A904 VD, A919 HA.Linked to prediscovery observations from 1904 Nov 15.Permanent number assigned -.
Named - for the Tama River, Honshu, Japan.
Companion discovered2003 Dec 24 by R. Behrend, R. Roy, C. Rinner, P. Antonini, P. Pravec, A. W. Harris, S. Sposetti, R. Durkee, and A. Klotzusinglightcurve observations from Geneva Observatory; Blauvac, France; Ottmarsheim, France; Bedoin, France; Ondrejov Observatory, Czech Republic; Space Science Institute; Gnosca, Switzerland; Shed of Science Observatory, Minneapolis, Minnesota, USA; Guitalens, France.Announced2004 Jan 12 [B04b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Polishook, David 2012, Minor Planet BulletinLightcurves for Shape Modeling: 852 Wladilena, 1089 Tama, and 1180 Rita
- Behrend, R., Bernasconi, L., Roy, R., Klotz, A., Colas, F., Antonini, P., Aoun, R., Augustesen, K., Barbotin, E., Berger, N., Berrouachdi, H., Brochard, E., Cazenave, A., Cavadore, C., Coloma, J., Cotrez, V., Deconihout, S., Demeautis, C., Dorseuil, J., Dubos, G., Durkee, R., Frappa, E., Hormuth, F., Itkonen, T., Jacques, C., Kurtze, L., Laffont, A., Lavayssière, M., Lecacheux, J., Leroy, A., Manzini, F., Masi, G., Matter, D., Michelsen, R., Nomen, J., Oksanen, A., Pääkkönen, P., Peyrot, A., Pimentel, E., Pray, D., Rinner, C., Sanchez, S., Sonnenberg, K., Sposetti, S., Starkey, D., Stoss, R., Teng, J.-P., Vignand, M., & Waelchli, N. 2006, Astronomy and AstrophysicsFour new binary minor planets: (854) Frostia, (1089) Tama, (1313) Berna, (4492) Debussy
- Behrend, Raoul, Roy, René, & Sposetti, Stefano 2004, Orion: Zeitschrift für Amateur-AstronomieLes quatre astéroïdes (1089) Tama et (1313) Berna. Histoire de deux découvertes magnifiques faites grâce à des amateurs
- Behrend, R., Roy, R., Rinner, C., Antonini, P., Pravec, P., Harris, A. W., Sposetti, S., Durkee, R., & Klotz, A. 2004, International Astronomical Union Circular(1089) Tama
- Sárneczky, K., Szabó, Gy., & Kiss, L. L. 1999, Astronomy and Astrophysics Supplement SeriesCCD observations of 11 faint asteroids
©2004-2006, 2014by Wm. Robert Johnston.
Last modified21 September 2014.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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