162173 Ryugu (1999 JU3)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1910626253 ± 2.00e+00
Semi-major axis (a)1.1909211747 AU ± 3.00e+00
Inclination (i)5.86654965° ± 4.00e+00
Long. of Asc. Node (Ω)251.29160345° ± 5.00e+00
Arg. of Perihelion (ω)211.61670373° ± 6.00e+00
Mean Anomaly (M)270.65926628° ± 7.56e-06
Mean Motion (n)0.7583815353°/day ± 2.87e+00
Perihelion dist (q)0.96338065 AU ± 3.40e+00
Aphelion dist (Q)1.41846170 AU ± 4.29e+00
Orbital Period1.29964436 yr ± 4.91e+00
NGA Modelr2
A21.49982929e-05 AU/d²
Physical Parameters
H (abs. magnitude)19.55
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-27
RMS Residual0.086″
Uncertainty0
Orbit TypeApollo
MOID0.000212 AU
Observations Used4741
Gaia Obs Used94
Oppositions7
Arc Total1986-2016
First Observation Used1999-05-10
Last Observation Used2025-07-23
Observations (7718)
Date Type RA Dec Mag Band Observatory
2021-03-25 02:34:06 S 10 50 31.538 -39 41 47.15 V C57
2021-03-25 02:34:06 s 1 +50428.620 0 +358343.86 6800.0 C57
2021-03-25 02:44:06 S 10 50 32.078 -39 41 27.06 V C57
2021-03-25 02:44:06 s 1 +50060.469 0 +358541.98 6930.0 C57
2021-03-25 02:54:06 S 10 50 32.640 -39 41 09.42 V C57
2021-03-25 02:54:06 s 1 +49692.167 0 +358739.01 6710.0 C57
2021-03-25 03:04:06 S 10 50 32.923 -39 40 49.76 V C57
2021-03-25 03:04:06 s 1 +49323.716 0 +358934.93 6140.0 C57
2021-03-25 03:14:06 S 10 50 33.662 -39 40 33.24 V C57
2021-03-25 03:14:06 s 1 +48955.116 0 +359129.76 5240.0 C57
2021-03-25 03:24:06 S 10 50 34.128 -39 40 15.06 V C57
2021-03-25 03:24:06 s 1 +48586.370 0 +359323.49 4010.0 C57
2021-03-25 03:34:06 S 10 50 34.663 -39 39 56.95 V C57
2021-03-25 03:34:06 s 1 +48217.478 0 +359516.12 2430.0 C57
2021-03-25 03:44:06 S 10 50 34.987 -39 39 38.45 V C57
2021-03-25 03:44:06 s 1 +47848.441 0 +359707.66 530.0 C57
2021-03-25 03:54:06 S 10 50 35.592 -39 39 19.80 V C57
2021-03-25 03:54:06 s 1 +47479.261 0 +359898.10 8300.0 C57
2021-03-25 04:04:06 S 10 50 36.060 -39 39 02.41 V C57
2021-03-25 04:04:06 s 1 +47109.940 0 +360087.45 5740.0 C57
2021-03-25 04:14:06 S 10 50 36.670 -39 38 45.13 V C57
2021-03-25 04:14:06 s 1 +46740.478 0 +360275.70 2860.0 C57
2021-03-25 04:24:06 S 10 50 37.010 -39 38 26.12 V C57
2021-03-25 04:24:06 s 1 +46370.877 0 +360462.86 9660.0 C57
2021-03-25 04:34:06 S 10 50 37.598 -39 38 08.45 V C57
2021-03-25 04:34:06 s 1 +46001.138 0 +360648.93 6140.0 C57
2021-03-25 04:44:06 S 10 50 38.261 -39 37 49.37 V C57
2021-03-25 04:44:06 s 1 +45631.262 0 +360833.90 2310.0 C57
2021-03-25 04:54:06 S 10 50 38.796 -39 37 31.12 V C57
2021-03-25 04:54:06 s 1 +45261.251 0 +361017.78 8160.0 C57
2021-03-25 05:04:06 S 10 50 39.178 -39 37 13.44 V C57
2021-03-25 05:04:06 s 1 +44891.106 0 +361200.57 3700.0 C57
2021-03-25 05:14:06 S 10 50 39.598 -39 36 54.97 V C57
2021-03-25 05:14:06 s 1 +44520.828 0 +361382.27 8940.0 C57
2021-03-25 05:24:06 S 10 50 40.046 -39 36 35.17 V C57
2021-03-25 05:24:06 s 1 +44150.418 0 +361562.88 3870.0 C57
2021-03-25 05:34:06 S 10 50 40.668 -39 36 18.54 V C57
2021-03-25 05:34:06 s 1 +43779.878 0 +361742.40 8490.0 C57
2021-03-25 05:44:06 S 10 50 41.242 -39 35 59.93 V C57
2021-03-25 05:44:06 s 1 +43409.209 0 +361920.84 2820.0 C57
2021-03-25 05:54:06 S 10 50 41.676 -39 35 43.15 V C57
2021-03-25 05:54:06 s 1 +43038.413 0 +362098.18 6850.0 C57
2021-03-25 06:04:06 S 10 50 42.077 -39 35 24.61 V C57
2021-03-25 06:04:06 s 1 +42667.489 0 +362274.44 580.0 C57
2021-03-25 06:14:06 S 10 50 42.463 -39 35 05.28 V C57
2021-03-25 06:14:06 s 1 +42296.441 0 +362449.61 4020.0 C57
2021-03-25 06:24:06 S 10 50 43.169 -39 34 48.29 V C57
2021-03-25 06:24:06 s 1 +41925.268 0 +362623.69 7170.0 C57
2021-03-25 06:34:06 S 10 50 43.630 -39 34 29.68 V C57
2021-03-25 06:34:06 s 1 +41553.973 0 +362796.69 40.0 C57
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2020-12-12 03:00:00 70251762.49 2 us 8560 -14 -14
2020-12-18 01:10:00 64846561.92 2 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)