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
2021-03-09 04:04:05 s 1 +155908.40 0 +167826.87 7690.0 C57
2021-03-09 04:14:05 S 10 30 56.419 -52 22 17.94 V C57
2021-03-09 04:14:05 s 1 +155813.13 1 +168609.18 170.0 C57
2021-03-09 04:24:05 S 10 30 57.948 -52 22 01.27 V C57
2021-03-09 04:24:05 s 1 +155716.06 4 +169389.54 8950.0 C57
2021-03-09 04:34:05 S 10 30 59.210 -52 21 43.74 V C57
2021-03-09 04:34:05 s 1 +155617.21 2 +170167.96 4060.0 C57
2021-03-09 04:44:05 S 10 31 00.670 -52 21 28.33 V C57
2021-03-09 04:44:05 s 1 +155516.58 7 +170944.45 5520.0 C57
2021-03-09 04:54:05 S 10 31 01.956 -52 21 12.60 V C57
2021-03-09 04:54:05 s 1 +155414.20 2 +171719.00 3350.0 C57
2021-03-09 05:04:05 S 10 31 02.995 -52 20 59.42 V C57
2021-03-09 05:04:05 s 1 +155310.06 9 +172491.62 7580.0 C57
2021-03-09 05:24:05 S 10 31 05.534 -52 20 28.54 V C57
2021-03-09 05:24:05 s 1 +155096.60 9 +174031.09 5330.0 C57
2021-03-09 05:34:05 S 10 31 07.140 -52 20 09.49 V C57
2021-03-09 05:34:05 s 1 +154987.30 5 +174797.94 8900.0 C57
2021-03-09 06:04:05 S 10 31 10.738 -52 19 26.22 V C57
2021-03-09 06:04:05 s 1 +154649.24 5 +177087.02 8670.0 C57
2021-03-09 06:14:05 S 10 31 11.897 -52 19 08.40 V C57
2021-03-09 06:14:05 s 1 +154533.21 3 +177846.24 8350.0 C57
2021-03-09 06:24:05 S 10 31 13.198 -52 18 53.64 V C57
2021-03-09 06:24:05 s 1 +154415.52 9 +178603.55 4620.0 C57
2021-03-09 06:34:05 S 10 31 14.438 -52 18 37.19 V C57
2021-03-09 06:34:05 s 1 +154296.20 3 +179358.96 7500.0 C57
2021-03-09 06:44:05 S 10 31 15.756 -52 18 22.32 V C57
2021-03-09 06:44:05 s 1 +154175.24 6 +180112.49 7010.0 C57
2021-03-09 07:04:05 S 10 31 18.281 -52 17 50.53 V C57
2021-03-09 07:04:05 s 1 +153928.48 6 +181613.86 6010.0 C57
2021-03-09 07:14:05 S 10 31 19.303 -52 17 33.36 V C57
2021-03-09 07:14:05 s 1 +153802.70 5 +182361.73 5550.0 C57
2021-03-09 07:24:05 S 10 31 20.635 -52 17 18.46 V C57
2021-03-09 07:24:05 s 1 +153675.33 8 +183107.71 1800.0 C57
2021-03-09 07:44:05 S 10 31 23.244 -52 16 47.03 V C57
2021-03-09 07:44:05 s 1 +153415.88 7 +184594.05 4540.0 C57
2021-03-09 07:54:05 S 10 31 24.240 -52 16 31.19 V C57
2021-03-09 07:54:05 s 1 +153283.82 5 +185334.42 1070.0 C57
2021-03-09 08:04:05 S 10 31 25.661 -52 16 16.28 V C57
2021-03-09 08:04:05 s 1 +153150.21 8 +186072.93 4400.0 C57
2021-03-09 08:34:05 S 10 31 29.218 -52 15 28.44 V C57
2021-03-09 08:34:05 s 1 +152740.24 1 +188277.28 5420.0 C57
2021-03-09 08:44:05 S 10 31 30.602 -52 15 12.38 V C57
2021-03-09 08:44:05 s 1 +152600.56 2 +189008.36 6170.0 C57
2021-03-09 09:04:05 S 10 31 32.760 -52 14 40.88 V C57
2021-03-09 09:04:05 s 1 +152316.73 7 +190464.98 8390.0 C57
2021-03-09 09:14:05 S 10 31 34.207 -52 14 24.47 V C57
2021-03-09 09:14:05 s 1 +152172.61 0 +191190.53 9900.0 C57
2021-03-09 09:24:05 S 10 31 35.191 -52 14 11.58 V C57
2021-03-09 09:24:05 s 1 +152027.02 0 +191914.25 8380.0 C57
2021-03-09 09:34:05 S 10 31 36.319 -52 13 53.54 V 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)