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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2075452173466076 | 3.4923e-08 | |
| a | 2.24835261036199 | 4.8528e-09 | au |
| q | 1.781717779172598 | 7.7927e-08 | au |
| i | 5.915677671347153 | 3.957e-06 | deg |
| node | 328.4162640379147 | 2.8925e-05 | deg |
| peri | 345.7209239517358 | 2.9942e-05 | deg |
| M | 269.0625073496311 | 9.3803e-06 | deg |
| tp | 2459511.553817691205
(2021-Oct-24.05381769) | 3.2633e-05 | TDB |
| period | 1231.388408732199
3.37 | 3.9867e-06
1.091e-08 | d
yr |
| n | .2923529224793056 | 9.4652e-10 | deg/d |
| Q | 2.714987441551381 | 5.86e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
13.49 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
4.989 |
km |
0.371 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| rotation period |
rot_per |
5.92 |
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:
[Stephens, R.D.; Warner, B.D. (2019) Minor Planet Bull. 45, 66-71.] |
| geometric albedo |
albedo |
0.258 |
|
0.078 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 1991 Darwin | Discovered 1967 May 6 by C. U. Cesco and A. R. Klemola at the Yale-Columbia Southern Station, El Leoncito. |
| Named in memory of Charles Darwin (1809-1882), the English naturalist who first established the theory of organic evolution; much of his research was done in Argentina, and he crossed the Andes at a pass located some 100 km south of El Leoncito. This planet also honors his second son, George Darwin (1845-1912), the astronomer noted for his pioneering application of detailed dynamical analyses to problems of cosmogony and geology. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: MPC 5282 | Last Updated: 2007-10-23 |
|
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Alternate Designations
| 1967 JL = 1954 UG = 1971 SU2 |
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