[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .09226882537638464 | 3.0097e-08 | |
| a | 2.223536783220319 | 6.0208e-09 | au |
| q | 2.018373656051395 | 6.6068e-08 | au |
| i | 4.032232556437283 | 3.1409e-06 | deg |
| node | 254.1084103693271 | 5.6914e-05 | deg |
| peri | 204.4000863558412 | 6.0965e-05 | deg |
| M | 275.1703941497751 | 2.1794e-05 | deg |
| tp | 2459285.871010158234
(2021-Mar-12.37101016) | 7.3418e-05 | TDB |
| period | 1211.057892198045
3.32 | 4.9189e-06
1.347e-08 | d
yr |
| n | .2972607687206492 | 1.2074e-09 | deg/d |
| Q | 2.428699910389242 | 6.5763e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
12.6 |
|
n/a |
MPO267714 |
|
| diameter |
diameter |
7.669 |
km |
0.162 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
28.61 |
h |
n/a |
LCDB (Rev. 2019-August); 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. (2007) http://www.asu.cas.cz/~ppravec/neo.htm] |
| geometric albedo |
albedo |
0.274 |
|
0.037 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
|
| 1810 Epimetheus (4196 P-L) Discovered 1960-Sep-24 by PLS at Palomar |
| These planets have all been discovered as a result of the Palomar survey of faint minor planets and subsequently identified with planets observed at other oppositions. In Sept. and Oct. 1960, T. Gehrels exposed 130 plates with the 122 cm Schmidt camera at Palomar. In the following years C. J. van Houten and I. van Houten-Groeneveld measured these plates astrometrically and photometrically at Leiden. P. Herget, Cincinnati, computed the orbits of the planets found on the NORC computer, Dahlgren, Virginia, USA. |
| Note: "planet" implies "minor planet" |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
[ show close-approach data ]
Alternate Designations
| 4196 P-L = 1942 FS = 1950 SC = 1957 WC1 = 1962 GC = 1970 SS |
|
|
|
