| 65803 Didymos (1996 GT) |
| Classification: Apollo [NEO, PHA] SPK-ID: 2065803 |
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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 147 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .3836266374011488 | 9.7908e-09 | |
| a | 1.644477952225658 | 5.2371e-09 | au |
| q | 1.013612405133002 | 1.7893e-08 | au |
| i | 3.407707200836149 | 3.0889e-06 | deg |
| node | 73.20386125199495 | 2.3235e-05 | deg |
| peri | 319.3216925766073 | 2.5562e-05 | deg |
| M | 45.04055202778419 | 1.6785e-05 | deg |
| tp | 2459104.130032260559
(2020-Sep-11.63003226) | 3.5455e-05 | TDB |
| period | 770.2656123041679
2.11 | 3.6796e-06
1.007e-08 | d
yr |
| n | .4673712473325898 | 2.2326e-09 | deg/d |
| Q | 2.275343499318315 | 7.2462e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
18.0 |
|
n/a |
MPO412594 |
|
| diameter |
diameter |
0.78 |
km |
0.08 |
Richardson et al., 2016, "Dynamical and Physical Properties of 65803 Didymos", LPSC Abstract (submitted) |
uncertainty is published as "10%" |
| bulk density |
density |
2.1 |
g/cm^3 |
0.6 |
Richardson et al., 2016, "Dynamical and Physical Properties of 65803 Didymos", LPSC Abstract (submitted) |
uncertainty is published as "30%" |
| rotation period |
rot_per |
2.2593 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Pravec, P.; et al. (2003) IAUC 8244. (65803)]
[Kitazato, K.; Abe, M.; Mito, H. (2005) Asia-Oceana Geophys. Soc. abstract 58-PS-A1183.]
[Pravec, P.; et al. (2006) Icarus 181, 63-93.] |
| SMASSII spectral type |
spec_B |
Xk |
|
n/a |
Binzel et al. (2004) Meteorit. Planet. Sci. 39, 351-366 |
|
|
| 65803 Didymos | Discovered 1996 Apr. 11 by Spacewatch at Kitt Peak. |
| Greek for "twin", this rapid-rotator Amor possesses a satellite with an orbital period of 11.9 hr. Suspicions arose in the Goldstone delay-Doppler echoes, and these were confirmed with the optical light curve analysis, along with Arecibo radar imaging on 2003 Nov. 23. The name was suggested by J. Montani. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20040713/MPCPages.arc | Last Updated: 2004-07-14 |
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