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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 40 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1576141721469449 | 3.3545e-08 | |
| a | 2.71738726043168 | 9.0588e-09 | au |
| q | 2.289088516976086 | 9.434e-08 | au |
| i | 6.049926328660582 | 3.4972e-06 | deg |
| node | 140.6285657528618 | 3.3603e-05 | deg |
| peri | 217.1328408137612 | 3.5444e-05 | deg |
| M | 276.4782883453244 | 1.3087e-05 | deg |
| tp | 2459380.096862886629
(2021-Jun-14.59686289) | 6.0413e-05 | TDB |
| period | 1636.159843133868
4.48 | 8.1816e-06
2.24e-08 | d
yr |
| n | .2200274022802461 | 1.1002e-09 | deg/d |
| Q | 3.145686003887274 | 1.0487e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
10.8 |
|
n/a |
MPO473780 |
|
| diameter |
diameter |
13.239 |
km |
0.150 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| rotation period |
rot_per |
19.9000 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2007) Planet. Space Sci. 55, 986-997.]
[Oey, J. (2008) Minor Planet Bull. 35, 132-135.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Durech, J.; Hanus, J.; Broz, M.; Lehky, M.; et al. (2017) Icarus 304, 101-109.] |
| geometric albedo |
albedo |
0.636 |
|
0.050 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| B-V |
BV |
0.689 |
|
0.050 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=12.00, mean=18.10, max.=24.21) deg. |
| U-B |
UB |
0.233 |
|
0.093 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=12.00, mean=18.10, max.=24.21) deg. |
| Tholen spectral type |
spec_T |
E |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
X |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
|
| 1251 Hedera (1933 BE) Discovered 1933-Jan-25 by Reinmuth, K. at Heidelberg |
| 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 |
| 2123-Nov-17 05:46 |
00:03 |
Iris |
0.00320569661232198 |
0.0032003785585609 |
0.00321103583655676 |
3.80897918865424 |
3.80897871784817 |
2496789.740314006 |
2.80673399575178 |
490.475120600909 |
24.841738613974 |
57.3332380731455 |
16246.1749665319 |
T |
40 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:59:32 |
2020-Dec-18 01:59 |
| 2130-Feb-25 23:48 |
00:02 |
Europ |
0.0384710867624013 |
0.0384690478585629 |
0.0384731275696048 |
3.2038388078454 |
3.20383872161377 |
2499082.491599783 |
1.94251561952828 |
476.875809652227 |
41.0393311733637 |
-78.7253863890461 |
137405.611794589 |
T |
40 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:59:32 |
2020-Dec-18 01:59 |
|
Alternate Designations
| 1933 BE = 1929 CD1 = 1931 TJ2 = 1975 NW1 = A907 GD = A915 CA |
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