[ hide orbit diagram ]
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 39 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .04756290661129741 | 3.5282e-08 | |
| a | 3.100950762213112 | 1.2407e-08 | au |
| q | 2.953460530703738 | 1.1245e-07 | au |
| i | 13.27137286242597 | 3.9844e-06 | deg |
| node | 245.6552191466734 | 1.5527e-05 | deg |
| peri | 54.0110463646024 | 4.1793e-05 | deg |
| M | 348.9627934867589 | 3.8113e-05 | deg |
| tp | 2459061.650132206610
(2020-Jul-31.15013221) | 0.00021116 | TDB |
| period | 1994.530732751058
5.46 | 1.197e-05
3.277e-08 | d
yr |
| n | .1804935838233245 | 1.0833e-09 | deg/d |
| Q | 3.248440993722486 | 1.2997e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.7 |
|
n/a |
MPO347525 |
|
| diameter |
diameter |
69.883 |
km |
0.420 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
26.017 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2000) Minor Planet Bull. 27, 4-6.]
[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]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.] |
| geometric albedo |
albedo |
0.040 |
|
0.005 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
|
| 1243 Pamela (1932 JE) Discovered 1932-May-07 by Jackson, C. at Johannesburg (UO) |
| Subsequently reported as discovered on Apr. 4 by E. L. Johnson. |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
[ show close-approach data ]
Alternate Designations
| 1932 JE = 1929 XD = 1934 VL = 1951 AN = 1954 JO |
|
|
