[ hide orbit diagram ]
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 | .175418389422634 | 3.6312e-08 | |
a | 3.982118470410618 | 3.4752e-08 | au |
q | 3.283581661841065 | 1.547e-07 | au |
i | 4.490634996881902 | 4.741e-06 | deg |
node | 52.25382586023585 | 4.7738e-05 | deg |
peri | 290.24556676651 | 4.9504e-05 | deg |
M | 279.9279136570484 | 1.4634e-05 | deg |
tp | 2459646.077424984785 (2022-Mar-07.57742498) | 0.00012272 | TDB |
period | 2902.483045079048 7.95 | 3.7996e-05 1.04e-07 | d yr |
n | .1240317322819006 | 1.6237e-09 | deg/d |
Q | 4.680655278980172 | 4.0849e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
12.9 |
|
n/a |
MPO435895 |
|
diameter |
diameter |
16.029 |
km |
0.544 |
urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G) |
|
geometric albedo |
albedo |
0.052 |
|
0.010 |
urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G) |
|
|
21047 Hodierna | Discovered 1990 Sept. 22 by E. W. Elst at the European Southern Observatory. |
Giovanni Battista Hodierna (1597-1660) was a catholic priest who taught mathematics and astronomy in Ragusa, Sicily. An enthusiastic follower of Galileo, he observed the rings of Saturn and the eclipses of Jupiter's satellites. His best-known work was Medicaeorum Ephemerides. |
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
Reference: 20040928/MPCPages.arc | Last Updated: 2004-09-28 |
|
[ show close-approach data ]
|