[ 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 38 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .2254477002123 | 2.9083e-08 | |
a | 2.422803625255509 | 6.8276e-09 | au |
q | 1.876588119875631 | 7.2505e-08 | au |
i | 1.795574312070955 | 3.1219e-06 | deg |
node | 227.4414098322967 | 0.00010705 | deg |
peri | 5.811852372789891 | 0.00010732 | deg |
M | 314.9945792332098 | 9.1738e-06 | deg |
tp | 2459172.701953834317 (2020-Nov-19.20195383) | 3.5393e-05 | TDB |
period | 1377.449701039098 3.77 | 5.8226e-06 1.594e-08 | d yr |
n | .2613525559070716 | 1.1048e-09 | deg/d |
Q | 2.969019130635387 | 8.3669e-09 | 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 |
18.681 |
km |
0.043 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
148.6 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Dymock, R. (2009) Minor Planet Bull. 36, 182-183.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] |
geometric albedo |
albedo |
0.060 |
|
0.004 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
|
1909 Alekhin (1972 RW2) Discovered 1972-Sep-04 by Zhuravleva, L. at Nauchnyj |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
[ hide close-approach data ]
Close-Approach Data ...sorted by Date/Time (TDB)
|
Date/Time (TDB) |
Time Uncertainty (days_HH:MM) |
Body |
Nominal Distance (au) |
Minimum Distance (au) |
Maximum Distance (au) |
V-relative (km/s) |
V-infinity (km/s) |
JD (TDB) |
Time Uncertainty (minutes) |
Semi-major axis (km) |
Semi-minor axis (km) |
range-LOV angle (deg) |
N-sigma |
BP |
Orbit Ref. |
Reference |
Modified |
2197-Apr-22 11:44 |
< 00:01 |
Eunom |
0.034281577632023 |
0.0342700132788851 |
0.0342931428366333 |
8.58880770935281 |
8.58880766167677 |
2523609.988857329 |
0.512741340240689 |
636.58181212508 |
33.4960897392698 |
-25.1160963779812 |
65376.1583833431 |
T |
38 |
CATAB v2.0f-lin.ifort 2020-Nov-13 04:14:29 |
2020-Nov-13 04:14 |
|
Alternate Designations
1972 RW2 = 1926 GU = 1930 KF = 1930 KM = 1934 NZ = 1934 OC = 1941 FJ = 1960 FD = 1969 UU = 1971 DL |
|
|