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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 28 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .2361983187372322 | 4.1248e-08 | |
a | 2.378633813048881 | 9.5031e-09 | au |
q | 1.816804505515204 | 9.8779e-08 | au |
i | 22.74177135760146 | 4.4811e-06 | deg |
node | 102.7472924261415 | 1.0024e-05 | deg |
peri | 99.43670002050484 | 1.5507e-05 | deg |
M | 272.2102403880384 | 1.596e-05 | deg |
tp | 2459327.261716127667 (2021-Apr-22.76171613) | 6.0686e-05 | TDB |
period | 1339.953752304524 3.67 | 8.0301e-06 2.199e-08 | d yr |
n | .268665988942419 | 1.6101e-09 | deg/d |
Q | 2.940463120582559 | 1.1748e-08 | au |
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| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
13.0 |
|
n/a |
MPO400017 |
|
diameter |
diameter |
7.323 |
km |
0.209 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
23.10 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Warner, B.D.; Pravec, P.; Kusnirak, P.; Pray, D.P.; et al. (2011) Minor Planet Bull. 38, 3.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] |
geometric albedo |
albedo |
0.266 |
|
0.047 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
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2261 Keeler (1977 HC) Discovered 1977-Apr-20 by Klemola, A. R. at Mount Hamilton |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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