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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 28 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .15136915525197 | 3.4793e-08 | |
a | 2.369153696974427 | 7.3565e-09 | au |
q | 2.010536903201326 | 8.4015e-08 | au |
i | 7.547337935626346 | 3.5241e-06 | deg |
node | 69.57497782946942 | 2.6778e-05 | deg |
peri | 288.0458706589555 | 2.8622e-05 | deg |
M | 321.6447943433807 | 1.1107e-05 | deg |
tp | 2459342.409051093878 (2021-May-07.90905109) | 4.1265e-05 | TDB |
period | 1331.951100749197 3.65 | 6.2038e-06 1.699e-08 | d yr |
n | .2702801925667592 | 1.2589e-09 | deg/d |
Q | 2.727770490747528 | 8.4701e-09 | 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 |
13.27 |
|
n/a |
E2021B10 |
|
diameter |
diameter |
5.873 |
km |
0.181 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
rotation period |
rot_per |
5.565 |
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: [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] |
geometric albedo |
albedo |
0.295 |
|
0.075 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
|
3944 Halliday (1981 WP1) Discovered 1981-Nov-24 by Bowell, E. at Flagstaff (AM) |
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory. |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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