65803 Didymos (1996 GT) |
Classification: Apollo [NEO, PHA] SPK-ID: 2065803 |
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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 147 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .3836383357953901 | 9.7517e-09 | |
a | 1.644576707340323 | 5.6956e-09 | au |
q | 1.013654036248419 | 1.7955e-08 | au |
i | 3.407819057354463 | 3.0891e-06 | deg |
node | 73.20696104203657 | 2.3229e-05 | deg |
peri | 319.3018682344476 | 2.5553e-05 | deg |
M | 311.5778279424352 | 1.6314e-05 | deg |
tp | 2459104.114705039489 (2020-Sep-11.61470504) | 3.5445e-05 | TDB |
period | 770.3349979813357 2.11 | 4.0018e-06 1.096e-08 | d yr |
n | .4673291502312379 | 2.4277e-09 | deg/d |
Q | 2.275499378432227 | 7.8807e-09 | au |
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| | 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 |
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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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