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
2021-03-26 14:34:06 S 10 52 04.735 -38 35 43.22 V C57
2021-03-26 14:34:06 s 1 -30640.512 0 +376463.93 7720.0 C57
2021-03-26 14:44:06 S 10 52 05.105 -38 35 25.04 V C57
2021-03-26 14:44:06 s 1 -31014.556 0 +376435.43 8220.0 C57
2021-03-26 14:54:06 S 10 52 05.378 -38 35 04.49 V C57
2021-03-26 14:54:06 s 1 -31388.514 0 +376405.93 8570.0 C57
2021-03-26 15:04:06 S 10 52 05.736 -38 34 47.53 V C57
2021-03-26 15:04:06 s 1 -31762.384 0 +376375.40 8800.0 C57
2021-03-26 15:14:06 S 10 52 06.168 -38 34 29.39 V C57
2021-03-26 15:14:06 s 1 -32136.165 0 +376343.85 8890.0 C57
2021-03-26 15:24:06 S 10 52 06.480 -38 34 09.48 V C57
2021-03-26 15:24:06 s 1 -32509.857 0 +376311.29 8840.0 C57
2021-03-26 15:34:06 S 10 52 06.792 -38 33 50.33 V C57
2021-03-26 15:34:06 s 1 -32883.457 0 +376277.71 8650.0 C57
2021-03-26 15:44:06 S 10 52 07.250 -38 33 31.46 V C57
2021-03-26 15:44:06 s 1 -33256.965 0 +376243.11 8320.0 C57
2021-03-26 15:54:06 S 10 52 07.598 -38 33 14.29 V C57
2021-03-26 15:54:06 s 1 -33630.381 0 +376207.49 7840.0 C57
2021-03-26 16:04:06 S 10 52 08.011 -38 32 56.44 V C57
2021-03-26 16:04:06 s 1 -34003.703 0 +376170.85 7220.0 C57
2021-03-26 16:14:06 S 10 52 08.165 -38 32 34.76 V C57
2021-03-26 16:14:06 s 1 -34376.930 0 +376133.20 6450.0 C57
2021-03-26 16:24:06 S 10 52 08.441 -38 32 16.26 V C57
2021-03-26 16:24:06 s 1 -34750.061 0 +376094.53 5520.0 C57
2021-03-26 16:34:06 S 10 52 08.851 -38 32 00.49 V C57
2021-03-26 16:34:06 s 1 -35123.095 0 +376054.84 4450.0 C57
2021-03-26 16:44:06 S 10 52 09.214 -38 31 42.24 V C57
2021-03-26 16:44:06 s 1 -35496.031 0 +376014.14 3220.0 C57
2021-03-26 16:54:06 S 10 52 09.509 -38 31 23.95 V C57
2021-03-26 16:54:06 s 1 -35868.868 0 +375972.41 1840.0 C57
2021-03-26 17:04:06 S 10 52 10.046 -38 31 04.48 V C57
2021-03-26 17:04:06 s 1 -36241.605 0 +375929.67 300.0 C57
2021-03-26 17:14:06 S 10 52 10.378 -38 30 43.88 V C57
2021-03-26 17:14:06 s 1 -36614.241 0 +375885.92 8600.0 C57
2021-03-26 17:24:06 S 10 52 10.721 -38 30 27.86 V C57
2021-03-26 17:24:06 s 1 -36986.775 0 +375841.14 6730.0 C57
2021-03-26 17:34:06 S 10 52 10.882 -38 30 07.81 V C57
2021-03-26 17:34:06 s 1 -37359.206 0 +375795.35 4700.0 C57
2021-03-26 17:44:06 S 10 52 11.294 -38 29 48.05 V C57
2021-03-26 17:44:06 s 1 -37731.533 0 +375748.54 2510.0 C57
2021-03-26 17:54:06 S 10 52 11.626 -38 29 31.13 V C57
2021-03-26 17:54:06 s 1 -38103.756 0 +375700.72 150.0 C57
2021-03-26 18:04:06 S 10 52 12.091 -38 29 12.05 V C57
2021-03-26 18:04:06 s 1 -38475.872 0 +375651.87 7610.0 C57
2021-03-26 18:14:06 S 10 52 12.362 -38 28 53.04 V C57
2021-03-26 18:14:06 s 1 -38847.881 0 +375602.02 4910.0 C57
2021-03-26 18:24:06 S 10 52 12.806 -38 28 35.04 V C57
2021-03-26 18:24:06 s 1 -39219.782 0 +375551.14 2030.0 C57
2021-03-26 18:34:06 S 10 52 13.078 -38 28 15.64 V C57
2021-03-26 18:34:06 s 1 -39591.574 0 +375499.25 8980.0 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)