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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 84 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1441107310884887 | 3.8578e-08 | |
| a | 3.048200198486097 | 1.0842e-08 | au |
| q | 2.608921839378189 | 1.175e-07 | au |
| i | 7.989497537467758 | 4.2284e-06 | deg |
| node | 303.901180591704 | 2.9827e-05 | deg |
| peri | 55.25229528718416 | 3.2833e-05 | deg |
| M | 24.8509507822558 | 1.4079e-05 | deg |
| tp | 2458866.314939641335
(2020-Jan-17.81493964) | 7.5906e-05 | TDB |
| period | 1943.854066284325
5.32 | 1.0371e-05
2.839e-08 | d
yr |
| n | .1851990878554683 | 9.8804e-10 | deg/d |
| Q | 3.487478557594005 | 1.2404e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.6 |
|
n/a |
MPO502155 |
IRAS observations used: 4 |
| diameter |
diameter |
132.385 |
km |
0.258 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
6.896 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Stanzel, R. (1978) Astron. Astrophys. Suppl. Ser. 34, 373-376.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Michalowski, T.; Kaasalainen, M.; Polinska, M.; Marciniak, A.; et al. (2006) Astron. Astrophys. 459, 663-668.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J. (2011) Database of Asteroid Models from Inversion Techniques (DAMIT). http://astro.troja.mff.cuni.cz/projects/asteroids3D/web.php]
[Strabla, L.; Quadri, U.; Girelli, R. (2011) Minor Planet Bull. 38, 169-172.]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Alton, K.B. (2015) Minor Planet Bull. 42, 146-148.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.] |
| geometric albedo |
albedo |
0.023 |
|
0.004 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.712 |
|
0.031 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=18.01 deg. |
| U-B |
UB |
0.297 |
|
0.034 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=18.01 deg. |
| Tholen spectral type |
spec_T |
X |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
|
| 283 Emma (A889 CA) Discovered 1889-Feb-08 by Charlois, A. at Nice |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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