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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 92 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .08106102339171281 | 9.3002e-09 | |
| a | 2.581381969180913 | 3.9099e-09 | au |
| q | 2.372132504994193 | 2.3476e-08 | au |
| i | 5.78646615305199 | 3.359e-07 | deg |
| node | 203.6336311773526 | 3.7909e-06 | deg |
| peri | 171.3914701752239 | 1.7098e-05 | deg |
| M | 180.0953001512437 | 1.5919e-05 | deg |
| tp | 2460153.536542252858
(2023-Jul-28.03654225) | 6.698e-05 | TDB |
| period | 1514.875127999125
4.15 | 3.4418e-06
9.423e-09 | d
yr |
| n | .237643349835372 | 5.3992e-10 | deg/d |
| Q | 2.790631433367632 | 4.2269e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.36 |
|
n/a |
MPCxxxxx |
IRAS observations used: 17 |
| diameter |
diameter |
57.30 |
km |
1.1 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 17 |
| rotation period |
rot_per |
11.484 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Gil Hutton, R. (1990) Minor Planet Bull. 17, 15-17.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shevchenko, V.G.; Bel'skaya, I.N.; Krugly, Yu.N.; Chiorny, V.G.; Gaftonyuk, N.M. (2002) Icarus 155, 365-374.]
[Tungalag, N.; Shevchenko, V.G.; Lupishko, D.F. (2002) Kin. Fiz. Neb. Tel 18, 508-516; Kinematics and Physics of Celestial Bodies 18, ???-???.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] |
| geometric albedo |
albedo |
0.2306 |
|
0.010 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 17 |
| B-V |
BV |
0.874 |
|
0.021 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=4.97, mean=6.52, max.=8.30) deg. |
| U-B |
UB |
0.342 |
|
0.228 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=4.97, mean=6.52, max.=8.30) deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
Sl |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
|
| 119 Althaea (A872 GA) Discovered 1872-Apr-03 by Watson, J. C. at Ann Arbor |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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