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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 39 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1479762852410689 | 2.9715e-08 | |
| a | 2.685072980624919 | 7.6982e-09 | au |
| q | 2.287745855350879 | 7.9125e-08 | au |
| i | 10.77728406330256 | 3.2089e-06 | deg |
| node | 232.5847466415012 | 1.9874e-05 | deg |
| peri | 43.66687284369737 | 2.4136e-05 | deg |
| M | 63.88322229995583 | 1.2792e-05 | deg |
| tp | 2458915.321433449515
(2020-Mar-06.82143345) | 5.7272e-05 | TDB |
| period | 1607.061764607412
4.40 | 6.9113e-06
1.892e-08 | d
yr |
| n | .2240113030677101 | 9.6338e-10 | deg/d |
| Q | 3.082400105898958 | 8.8374e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
11.33 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
22.483 |
km |
0.306 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
5.848 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shipley, H.; Dillard, A.; Kendall, J.; Reichert, M.; et al. (2008) Minor Planet Bull. 35, 99-101.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2018) Icarus 309, 297-337.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] |
| geometric albedo |
albedo |
0.153 |
|
0.028 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| SMASSII spectral type |
spec_B |
X |
|
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) |
|
| 789 Lena (A914 MA) Discovered 1914-Jun-24 by Neujmin, G. at Simeis |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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