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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 44 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .1197194586914581 | 3.1418e-08 | |
a | 2.973817878035893 | 1.0455e-08 | au |
q | 2.617794011430455 | 9.2133e-08 | au |
i | .3957313013857401 | 3.7327e-06 | deg |
node | 5.659772087997225 | 0.00050954 | deg |
peri | 69.11632215150561 | 0.0005098 | deg |
M | 215.7208884846609 | 1.6896e-05 | deg |
tp | 2459751.207815681279 (2022-Jun-20.70781568) | 8.9524e-05 | TDB |
period | 1873.138882037878 5.13 | 9.8777e-06 2.704e-08 | d yr |
n | .1921907678347581 | 1.0135e-09 | deg/d |
Q | 3.329841744641331 | 1.1706e-08 | au |
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| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
9.7 |
|
n/a |
MPO492755 |
IRAS observations used: 12 |
diameter |
diameter |
81.113 |
km |
0.711 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
rotation period |
rot_per |
17.416 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Behrend, R. (2003) 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] [Buchheim, R.K. (2007) Minor Planet Bull. 34, 68-71.] [Marciniak, A.; Bartczak, P.; Muller, T.; Sanabria, J.J.; et al. (2018) Astron. Astrophys. 610, A7.] |
geometric albedo |
albedo |
0.040 |
|
0.009 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
B-V |
BV |
0.673 |
|
0.033 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=9.21, mean=9.40, max.=9.58) deg. |
U-B |
UB |
0.289 |
|
0.046 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=9.21, mean=9.40, max.=9.58) deg. |
Tholen spectral type |
spec_T |
XC |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices |
SMASSII spectral type |
spec_B |
C |
|
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) |
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551 Ortrud (A904 WC) Discovered 1904-Nov-16 by Wolf, M. at Heidelberg |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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Alternate Designations
A904 WC = 1962 DC = 1978 AA = A906 EA |
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