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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 125 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .173849911188396 | 3.359e-08 | |
| a | 2.20923778006675 | 3.5043e-09 | au |
| q | 1.825161988208096 | 7.4029e-08 | au |
| i | 4.10698977232797 | 3.3764e-06 | deg |
| node | 253.0523345296097 | 4.3945e-05 | deg |
| peri | 129.9205875351853 | 4.4647e-05 | deg |
| M | 172.9363570678087 | 8.2628e-06 | deg |
| tp | 2458424.336258118962
(2018-Nov-01.83625812) | 2.7417e-05 | TDB |
| period | 1199.394682494926
3.28 | 2.8537e-06
7.813e-09 | d
yr |
| n | .3001514057500608 | 7.1415e-10 | deg/d |
| Q | 2.593313571925403 | 4.1135e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
11.5 |
|
n/a |
MPO502162 |
|
| diameter |
diameter |
12.2 |
km |
n/a |
n/a |
Yeomans E-mail 2001-Apr-04 |
| extent |
extent |
18.2x10.5x8.9 |
km |
n/a |
Thomas, P.C. et al. (1994) Icarus v.107, pp.23-36 |
|
| rotation period |
rot_per |
7.042 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Barucci, M.A.; Fulchignoni, M.; Di Martino, M. (1989) Bull. Amer. Astron. Soc. 21, 963.]
[Di Martino, M.; Ferreri, W.; Fulchignoni, M.; De Angelis, G.; et al. (1990) Icarus 87, 372-376.]
[Goldader, J.D.; Tholen, D.J.; Cruikshank, D.P.; Hartmann, W.K. (1991) Astron. J. 102, 1503-1509.]
[De Angelis, G. (1992) in Physical properties of small solar system bodies. A. Brahic, J.-C. Gerard, J. Surdej, eds. Universite de Liege, Institut d'Astrophysique, Liege, pp. 195-201.]
[Magnusson, P.; Barucci, M.A.; Binzel, R.P.; Blanco, C.; et al. (1992) Icarus 97, 124-129.]
[Wisniewski, W.Z.; Barucci, M.A.; Fulchignoni, M.; De Sanctis, C.; et al. (1993) Icarus 101, 213-222.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Kaasalainen, M.; Torppa, J.; Muinonen, K. (2001) Icarus 153, 37-51.]
[Tungalag, N.; Shevchenko, V.G.; Lupishko, D.F. (2002) Kin. Fiz. Neb. Tel 18, 508-516; Kinematics and Physics of Celestial Bodies 18, ???-???.]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
[Dykhuis, M.J.; Molnar, L.A.; Gates, C.J.; Gonzales, J.A.; et al. (2016) Icarus 267, 174-203.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] |
| geometric albedo |
albedo |
0.246 |
|
0.032 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.870 |
|
0.030 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=19.53 deg. |
| U-B |
UB |
0.554 |
|
0.049 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=19.53 deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices |
| 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) |
|
| 951 Gaspra (A916 OJ) Discovered 1916-Jul-30 by Neujmin, G. at Simeis |
| Discovered at Simeis during the First World War while Simeis was not in communication with the Rechen-Institut for long periods of time were given provisional designations containing the Greek letter SIGMA. These are here abbreviated S. |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A916 OJ = 1955 MG1 = A913 YA |
|
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