[ 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 56 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1731253174141213 | 2.7825e-08 | |
| a | 2.475825425330469 | 4.9193e-09 | au |
| q | 2.04719736270818 | 6.8289e-08 | au |
| i | 5.101355713530261 | 2.9452e-06 | deg |
| node | 148.4289166584799 | 3.6614e-05 | deg |
| peri | 139.9952265863772 | 3.7889e-05 | deg |
| M | 349.7874225094055 | 1.0019e-05 | deg |
| tp | 2459040.865591316279
(2020-Jul-10.36559132) | 3.9616e-05 | TDB |
| period | 1422.913352407222
3.90 | 4.2408e-06
1.161e-08 | d
yr |
| n | .2530020534215719 | 7.5405e-10 | deg/d |
| Q | 2.904453487952759 | 5.7709e-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 |
MPO492752 |
IRAS observations used: 17 |
| diameter |
diameter |
97.109 |
km |
0.850 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
12.054 |
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. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D.; Roy, R.; Dyvig, R.; Reddy, V.; et al. (2007) Minor Planet Bull. 34, 99.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Pilcher, F.; Martinez, L. (2015) Minor Planet Bull. 42, 239.] |
| geometric albedo |
albedo |
0.049 |
|
0.007 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.624 |
|
0.017 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=1.36, mean=6.66, max.=21.17) deg. |
| U-B |
UB |
0.235 |
|
0.021 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=1.36, mean=6.66, max.=21.17) deg. |
| Tholen spectral type |
spec_T |
FP |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
B |
|
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) |
|
| 335 Roberta (A892 RB) Discovered 1892-Sep-01 by Staus, A. at Heidelberg |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A892 RB = 1956 EB1 = 1973 KE = A910 EC |
|
|
