| 162173 Ryugu (1999 JU3) |
| Classification: Apollo [NEO, PHA] SPK-ID: 2162173 |
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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 150 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1903011687364745 | 3.5915e-08 | |
| a | 1.189679559053114 | 3.5026e-09 | au |
| q | .9632821485434129 | 4.365e-08 | au |
| i | 5.881928039521994 | 1.5581e-06 | deg |
| node | 251.5782927443298 | 2.3244e-05 | deg |
| peri | 211.4853515130234 | 2.2297e-05 | deg |
| M | 193.6376529371751 | 1.2485e-05 | deg |
| tp | 2459219.526147536735
(2021-Jan-05.02614754) | 1.6056e-05 | TDB |
| period | 473.961894054356
1.30 | 2.0931e-06
5.731e-09 | d
yr |
| n | .7595547332307556 | 3.3544e-09 | deg/d |
| Q | 1.416076969562815 | 4.1692e-09 | au |
|
Additional Model Parameters
| Parameter | Value | Uncertainty (1-sigma) |
| A2 [EST] | -1.989009101871809E-14 | 1.151E-14 |
| ALN [SET] | 1. | n/a |
| NK [SET] | 0. | n/a |
| NM [SET] | 2. | n/a |
| R0 [SET] | 1. | n/a |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
19.3 |
|
n/a |
MPO385718 |
|
| rotation period |
rot_per |
7.627 |
h |
n/a |
LCDB (Rev. 2019-August); 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:
[Abe, M.; Kawakami, K.; Hasegawa, S.; Kuroda, D.; Yoshikawa, M.; et al. (2008) Lunar & Planetary Sci. XXXIX. No. 1391, p. 1594.]
[Muller, T.G.; Durech, J.; Hasegawa, S.; Abe, M.; et al. (2011) Astron. Astrophys. 525, A145.]
[Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Ishiguro, M.; et al. (2013) Astron. Astrophys. 550, L11.]
[Moskovitz, N.A.; Abe, S.; Pan, K.-S.; Osip, D.J.; et al. (2013) Icarus 224, 24.]
[Muller, T.G.; Durech, J.; Ishiguro, M.; Mueller, M.; et al. (2017) Astron. Astrophys. 599, A103.] |
| SMASSII spectral type |
spec_B |
Cg |
|
n/a |
Binzel et al. (2001) Icarus 151, 139-149 |
|
|
| 162173 Ryugu | Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. |
| Ryugu is the undersea palace of the Dragon God. In a Japanese legend, a fisherman was rewarded with a visit to Ryugu and brought back a box with a secret. The spaceprobe Hayabusa 2 will visit this asteroid and bring back a capsule containing surface samples. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: MPC batch dated 2015-09-28 | Last Updated: 2015-10-05 |
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