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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 33 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2928104214682478 | 3.185e-08 | |
| a | 3.940913567052547 | 2.4794e-08 | au |
| q | 2.786973004513955 | 1.2574e-07 | au |
| i | 6.814520280499887 | 3.8487e-06 | deg |
| node | 158.303268682488 | 3.6559e-05 | deg |
| peri | 215.7538145114059 | 3.7198e-05 | deg |
| M | 54.43795511072265 | 6.5337e-06 | deg |
| tp | 2458568.391216684473
(2019-Mar-25.89121668) | 5.1034e-05 | TDB |
| period | 2857.549694458478
7.82 | 2.6967e-05
7.383e-08 | d
yr |
| n | .1259820610287661 | 1.1889e-09 | deg/d |
| Q | 5.094854129591139 | 3.2054e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
12.0 |
|
n/a |
MPO452385 |
|
| diameter |
diameter |
23.457 |
km |
0.265 |
urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G) |
|
| rotation period |
rot_per |
40.0 |
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.; Stephens, R.D. (2019) Minor Planet Bull. 46, 43-45.] |
| geometric albedo |
albedo |
0.061 |
|
0.010 |
urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G) |
|
|
| 15231 Ehdita | Discovered 1987 Sept. 4 by L. V. Zhuravleva at the Crimean Astrophysical Observatory. |
| Ehdita Stanislavovna P'ekha (b. 1937) is a Russian singer. She gave concerts in more than 20 countries and won many international competitions, including the World Youth Festivals in Moscow (1957) and Sofia (1968). In 1988 she was honored with the title of People's Artist of the U.S.S.R. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20030614/MPCPages.arc | Last Updated: 2005-04-26 |
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