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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2032777313712122 | 1.9772e-08 | |
| a | 2.424564028093204 | 2.6377e-09 | au |
| q | 1.93170415289817 | 4.8089e-08 | au |
| i | 14.73973321833338 | 2.1871e-06 | deg |
| node | 138.6429159915694 | 1.1204e-05 | deg |
| peri | 239.7076643301936 | 1.2978e-05 | deg |
| M | 242.9448200723775 | 7.3905e-06 | deg |
| tp | 2459648.870518812478
(2022-Mar-10.37051881) | 2.8606e-05 | TDB |
| period | 1378.951250788707
3.78 | 2.2502e-06
6.161e-09 | d
yr |
| n | .2610679672643205 | 4.2602e-10 | deg/d |
| Q | 2.917423903288239 | 3.1738e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
5.65 |
|
n/a |
E2021B10 |
IRAS observations used: 18 |
| magnitude slope |
G |
0.24 |
|
n/a |
PDS3 (MPC 17257) |
Fit |
| diameter |
diameter |
185.18 |
km |
2.9 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 18 |
| rotation period |
rot_per |
7.2745 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Ahmad, I.I. (1954) Astrophys. J. 120, 551-560.]
[Yang, X.-y.; Zhang, Y.-y.; Li, X.-q. (1965) Acta Astron. Sin. 13, 66-74.]
[Gehrels, T.; Taylor, R.C. (1977) Astron. J. 82, 229-237.]
[Di Martino, M.; Cacciatori, S. (1984) Icarus 60, 75-82.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Gil Hutton, R.; Blain, A. (1988) Minor Planet Bull. 15, 3-4.]
[Michalowski, T. (1988) Acta Astronomica 38, 455-468.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Dotto, E.; De Angelis, G.; Di Martino, M.; Barucci, M.A.; et al. (1995) Icarus 117, 313-327.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. Space Sci. 49, 657-671.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Marset, M.; Carry, B.; Dumas, C.; Hanus, J.; et al. (2017) Astron. Astrophys. 604, A64.]
[Cellino, A.; Hestroffer, D.; Lu, X.-P.; Muinonen, K.; Tanga, P. (2019) Astron. Astrophys. 631, A67.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] |
| geometric albedo |
albedo |
0.2679 |
|
0.008 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 18 |
| B-V |
BV |
0.822 |
|
0.015 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=27; phase (min.=1.33, mean=14.50, max.=28.87) deg. |
| U-B |
UB |
0.399 |
|
0.019 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=24; phase (min.=1.33, mean=14.33, max.=28.87) 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 |
S |
|
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) |
|
| 6 Hebe (A847 NA) Discovered 1847-Jul-01 by Hencke, K. L. at Driesen |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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