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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 121 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1204859410881094 | 3.2434e-08 | |
| a | 2.266467799793777 | 3.7499e-09 | au |
| q | 1.993390293989727 | 7.3098e-08 | au |
| i | 5.415447063337787 | 3.6106e-06 | deg |
| node | 207.9606764194585 | 3.5984e-05 | deg |
| peri | 102.89936561 | 3.9189e-05 | deg |
| M | 122.3153705707576 | 1.6912e-05 | deg |
| tp | 2458577.050824593364
(2019-Apr-03.55082459) | 5.8163e-05 | TDB |
| period | 1246.300464406505
3.41 | 3.093e-06
8.468e-09 | d
yr |
| n | .2888549031965851 | 7.1687e-10 | deg/d |
| Q | 2.539545305597827 | 4.2017e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.1 |
|
n/a |
MPO502153 |
IRAS observations used: 21 |
| diameter |
diameter |
74.966 |
km |
1.168 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
8.097 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) 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]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.] |
| geometric albedo |
albedo |
0.083 |
|
0.015 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.785 |
|
0.014 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=5; phase (min.=2.28, mean=7.77, max.=15.33) deg. |
| U-B |
UB |
0.375 |
|
0.040 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=5; phase (min.=2.28, mean=7.77, max.=15.33) deg. |
| Tholen spectral type |
spec_T |
TDG |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices; used ground-based radiometric albedo |
|
| 72 Feronia (A861 KA) Discovered 1861-May-29 by Peters, C. H. F. at Clinton |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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Alternate Designations
| A861 KA = 1927 TK = 1950 LJ = A902 GA |
|
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