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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 36 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .239384215490516 | 1.1805e-08 | |
| a | 2.352929094282588 | 8.6398e-09 | au |
| q | 1.78967500894294 | 2.6048e-08 | au |
| i | 23.08126085736485 | 8.9076e-07 | deg |
| node | 240.4120052636756 | 2.9403e-06 | deg |
| peri | 209.55451457394 | 6.5096e-06 | deg |
| M | 167.225331213945 | 5.5577e-06 | deg |
| tp | 2458588.133744680307
(2019-Apr-14.63374468) | 1.837e-05 | TDB |
| period | 1318.292212757214
3.61 | 7.2611e-06
1.988e-08 | d
yr |
| n | .2730805784303758 | 1.5041e-09 | deg/d |
| Q | 2.916183179622235 | 1.0708e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
12.82 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
6.767 |
km |
0.102 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| rotation period |
rot_per |
79. |
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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm] |
| geometric albedo |
albedo |
0.352 |
|
0.103 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 16666 Liroma | Discovered 1993 Dec. 7 by C. S. Shoemaker at Palomar. |
| The Meiers are a family of amateur astronomers living near Ottawa, Ontario. Linda (b. 1950) is an active observer. Between 1978 and 1984, Rolf (b. 1953) discovered four comets and has recently built an observatory. Son Matthew (b. 1985) has joined the Royal Astronomical Society of Canada's Ottawa Center. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20010109/MPCPages.arc | Last Updated: 2009-05-11 |
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