Asteroids with Satellites Database--Johnston's Archive
(1089)
Tama
compiled by Wm. Robert Johnston
last updated
21 September 2014
--Orbital and physical data--
(See this page for definitions of quantities; source codes in brackets, see this 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 axis a: |
2.213775091 AU
| |
orbital period P: |
3.293885112 yr
(= 1203.0915370 d)
| |
eccentricity e: |
0.127502720
| |
perihelion distance q: |
1.931512745 AU
| |
aphelion distance Q: |
2.496037438 AU
| |
inclination i: |
3.7266981°
| |
argument of perihelion ω: |
354.353642°
| |
ascending node Ω: |
71.499243°
| |
mean anomaly M: |
83.705140°
| |
perihelion passage TP: |
2013 Aug 16.26403
| |
Epoch: |
2014 May 23
| |
data arc: |
1904-2014
(1551 obs.)
| |
Earth MOID: |
0.944211 AU
| |
Jupiter Tisserand invariant TJ: |
3.642
|
orbital data, secondary:
|
binary dynamical type: | B [P07f] | |
semimajor axis as: |
20.7
± 1.3 km
[B06a]
| |
separation/primary radius as/rp: | 1.95 [B06a] | |
separation/Hill radius as/rH: | 0.014 [*D] | |
orbital period Ps: |
0.6852
± 0.00004
d [B06a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
1.28
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
11.7
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
12.92
± 0.6
km [T04c]
| |
geometric albedo: |
0.242
± 0.023
[T04c]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
8.9x1014
± 3.2x1014
kg [B06a]
| |
density ρ: |
2.52
± 0.3
g/cm3[B06a]
| |
Hill radius rH: |
1500 km [*D]
|
other data, primary:
|
diameter dp: |
10.7
± 0.5
km [*D]
| |
rotation period RPp: |
16.444
± 0.001
h [B06a]
| |
amplitude in mag., rotational ΔM: |
0.41
± 0.01
[B06a]
| |
amplitude in mag., mutual events ΔM: | 0.55 ±0.03 [B06a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
7.33
km [*D]
| |
diameter ratio ds/dp: |
0.685
[B06a]
| |
component mag. difference ΔM: |
0.82
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(1089) Tama
--discovery and notes:
Primary discovered
1927 Nov 17
from
Tokyo, Japan
by
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 discovered
2003 Dec 24
by R. Behrend, R. Roy, C. Rinner, P. Antonini, P. Pravec, A. W. Harris, S. Sposetti, R. Durkee, and A. Klotz
using
lightcurve
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.
Announced
2004 Jan 12 [B04b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Polishook, David 2012, Minor Planet Bulletin Lightcurves 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 Astrophysics Four new binary minor planets: (854) Frostia, (1089) Tama, (1313) Berna, (4492) Debussy
- Behrend, Raoul, Roy, René, & Sposetti, Stefano 2004, Orion: Zeitschrift für Amateur-Astronomie Les 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 Series CCD observations of 11 faint asteroids
©
2004-2006, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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