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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 93 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .200918135337036 | 3.6321e-08 | |
a | 3.146181404624356 | 1.1745e-08 | au |
q | 2.514056503375173 | 1.1649e-07 | au |
i | 19.53026776519042 | 4.8085e-06 | deg |
node | 228.3651492309061 | 1.1358e-05 | deg |
peri | 63.29327824918501 | 1.5761e-05 | deg |
M | 323.2911500129719 | 1.1853e-05 | deg |
tp | 2459208.346322623516 (2020-Dec-24.84632262) | 6.7641e-05 | TDB |
period | 2038.327982786349 5.58 | 1.1414e-05 3.125e-08 | d yr |
n | .1766153450476051 | 9.8902e-10 | deg/d |
Q | 3.778306305873538 | 1.4105e-08 | au |
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| | Orbit Determination Parameters
Additional Information
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Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
8.2 |
|
n/a |
MPO473773 |
IRAS observations used: 4 |
diameter |
diameter |
80.756 |
km |
1.127 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
4.116 |
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. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Durech, J. (2006) IAU 2006, poster paper.] [Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.] [Gandolfi, D.; Cigna, M.; Fulvio, D.; Blanco, C. (2009) Planet. Space Sci. 57, 1-9.] [Marciniak, A.; Michalowski, T.; Hirsch, R.; Polinska, K.; et al. (2009) Astron. Astrophys. 498, 313-320.] [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.] [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.] [Schmidt, R.E. (2017) Minor Planet Bull. 44, 191-192.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] |
geometric albedo |
albedo |
0.186 |
|
0.023 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
B-V |
BV |
0.701 |
|
0.013 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=14.84, mean=18.35, max.=21.79) deg. |
U-B |
UB |
0.252 |
|
0.016 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=14.84, mean=18.35, max.=21.79) deg. |
Tholen spectral type |
spec_T |
M |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
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849 Ara (A915 UB) Discovered 1912-Feb-09 by Belyavskij, S. at Simeis |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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Alternate Designations
A915 UB = 1935 FU = 1960 WN = A912 CD |
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