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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 101 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2199420916167953 | 3.0301e-08 | |
| a | 3.158100280650464 | 5.903e-09 | au |
| q | 2.463501099388612 | 9.5509e-08 | au |
| i | 26.2800049035616 | 4.1133e-06 | deg |
| node | 31.09092908426666 | 7.5509e-06 | deg |
| peri | 61.62383165527613 | 1.2229e-05 | deg |
| M | 157.370767488849 | 9.6043e-06 | deg |
| tp | 2458104.395076824847
(2017-Dec-16.89507682) | 5.3031e-05 | TDB |
| period | 2049.921834218123
5.61 | 5.7475e-06
1.574e-08 | d
yr |
| n | .1756164522913677 | 4.9239e-10 | deg/d |
| Q | 3.852699461912315 | 7.2014e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
6.8 |
|
n/a |
MPO492748 |
IRAS observations used: 19 |
| diameter |
diameter |
267.080 |
km |
2.611 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
5.530 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Schober, H.J.; Scaltriti, F.; Zappala, V.; Harris, A.W. (1980) Astron. Astrophys. 91, 1-6.]
[Barucci, M.A.; Fulchignoni, M.; Burchi, R.; D'Ambrosio, V. (1985) Icarus 61, 152-162.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[Kryszczynska, A.; Colas, F.; Berthier, J.; Michalowski, T.; Pych, W. (1996) Icarus 124, 134-140.]
[Torppa, J.; Hentunen, V.-P.; Paakkonen, P.; Kehusmaa, P.; Muinonen, K. (2008) Icarus 198, 91-107.]
[Pilcher, F.; Jardine, D. (2009) Minor Planet Bull. 36, 52-54.]
[Oey, J. (2010) Minor Planet Bull. 37, 135-136.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2012) Minor Planet Bull. 39, 57-60.]
[Pilcher, F. (2013) Minor Planet Bull. 40, 189.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Ferrais, M.; Jehin, E.; Manfroid, J.; Moulane, Y.; et al. (2019) Minor Planet Bull. 46, 278-279.] |
| geometric albedo |
albedo |
0.053 |
|
0.006 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.687 |
|
0.021 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=7.43, mean=11.51, max.=13.73) deg. |
| U-B |
UB |
0.317 |
|
0.021 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=7.43, mean=11.51, max.=13.73) deg. |
| Tholen spectral type |
spec_T |
C |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
| SMASSII spectral type |
spec_B |
Cb |
|
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) |
|
| 31 Euphrosyne (A854 RA) Discovered 1854-Sep-01 by Ferguson, J. at Washington |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A854 RA = A907 GP = A918 GB |
|
|
