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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 48 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .08381731907138609 | 3.6317e-08 | |
| a | 3.01979706788451 | 1.1734e-08 | au |
| q | 2.766685773514798 | 1.077e-07 | au |
| i | 10.9026270053447 | 3.9735e-06 | deg |
| node | 147.2735344223771 | 1.983e-05 | deg |
| peri | 190.1955888149624 | 3.0324e-05 | deg |
| M | 153.6288489554727 | 2.3739e-05 | deg |
| tp | 2458382.533831467459
(2018-Sep-21.03383147) | 0.00012608 | TDB |
| period | 1916.748206302467
5.25 | 1.1172e-05
3.059e-08 | d
yr |
| n | .1878180967204157 | 1.0947e-09 | deg/d |
| Q | 3.272908362254222 | 1.2717e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
10.02 |
|
n/a |
E2021B10 |
IRAS observations used: 8 |
| diameter |
diameter |
33.387 |
km |
0.538 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
11.730 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2006) Minor Planet Bull. 33, 85-88.]
[Pilcher, F. (2016) Minor Planet Bull. 43, 222-224.] |
| geometric albedo |
albedo |
0.203 |
|
0.025 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.765 |
|
0.035 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=6.34, mean=8.15, max.=9.95) deg. |
| U-B |
UB |
0.445 |
|
0.035 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=6.34, mean=8.15, max.=9.95) deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 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) |
|
| 633 Zelima (A907 JH) Discovered 1907-May-12 by Kopff, A. at Heidelberg |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A907 JH = 1939 ND = A918 OA |
|
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