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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 112 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .09877043066510688 | 2.5755e-08 | |
| a | 2.774009806757077 | 9.2444e-09 | au |
| q | 2.50001966347445 | 7.4683e-08 | au |
| i | 6.003027264196054 | 4.0577e-07 | deg |
| node | 73.73847422638048 | 4.6449e-06 | deg |
| peri | 196.9324723114907 | 6.9655e-06 | deg |
| M | 308.3580745381393 | 1.0841e-05 | deg |
| tp | 2459442.580797115636
(2021-Aug-16.08079712) | 5.1278e-05 | TDB |
| period | 1687.564632461109
4.62 | 8.4357e-06
2.31e-08 | d
yr |
| n | .2133251628264949 | 1.0664e-09 | deg/d |
| Q | 3.047999950039703 | 1.0157e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
10.28 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
55.998 |
km |
0.637 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
7.648 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[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] |
| geometric albedo |
albedo |
0.051 |
|
0.008 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| Tholen spectral type |
spec_T |
DU |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 1 color indices |
| SMASSII spectral type |
spec_B |
D |
|
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) |
|
| 267 Tirza (A887 KB) Discovered 1887-May-27 by Charlois, A. at Nice |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A887 KB = 1965 GC = A922 AA |
|
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