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
2021-03-31 15:14:05 S 10 53 59.230 -34 34 02.21 V C57
2021-03-31 15:14:05 s 1 -179728.78 4 +68100.201 7320.0 C57
2021-03-31 15:24:05 S 10 53 59.131 -34 33 37.37 V C57
2021-03-31 15:24:05 s 1 -179463.24 0 +67212.512 1840.0 C57
2021-03-31 15:34:05 S 10 53 59.186 -34 33 15.98 V C57
2021-03-31 15:34:05 s 1 -179194.20 8 +66323.511 9590.0 C57
2021-03-31 15:44:05 S 10 53 59.174 -34 32 50.86 V C57
2021-03-31 15:44:05 s 1 -178921.66 2 +65433.206 530.0 C57
2021-03-31 17:24:05 S 10 53 59.088 -34 28 58.30 V C57
2021-03-31 17:24:05 s 1 -175997.25 9 +56459.871 3810.0 C57
2021-03-31 17:34:05 S 10 53 59.186 -34 28 36.44 V C57
2021-03-31 17:34:05 s 1 -175684.33 7 +55555.669 6380.0 C57
2021-03-31 17:44:05 S 10 53 59.153 -34 28 12.04 V C57
2021-03-31 17:44:05 s 1 -175367.57 9 +54650.250 1500.0 C57
2021-03-31 17:54:05 S 10 53 59.062 -34 27 51.44 V C57
2021-03-31 17:54:05 s 1 -175046.95 9 +53743.624 9110.0 C57
2021-03-31 18:04:05 S 10 53 59.124 -34 27 26.53 V C57
2021-03-31 18:04:05 s 1 -174722.44 8 +52835.798 9170.0 C57
2021-03-31 18:14:05 S 10 53 59.057 -34 27 01.91 V C57
2021-03-31 18:14:05 s 1 -174394.01 5 +51926.782 1610.0 C57
2021-03-31 18:24:05 S 10 53 59.158 -34 26 39.52 V C57
2021-03-31 18:24:05 s 1 -174061.63 3 +51016.586 6370.0 C57
2021-03-31 18:34:05 S 10 53 59.182 -34 26 15.29 V C57
2021-03-31 18:34:05 s 1 -173725.27 1 +50105.219 3410.0 C57
2021-03-31 18:44:05 S 10 53 59.213 -34 25 52.57 V C57
2021-03-31 18:44:05 s 1 -173384.89 9 +49192.691 2650.0 C57
2021-03-31 18:54:05 S 10 53 59.088 -34 25 28.56 V C57
2021-03-31 18:54:05 s 1 -173040.48 8 +48279.012 4040.0 C57
2021-03-31 19:04:05 S 10 53 59.052 -34 25 05.12 V C57
2021-03-31 19:04:05 s 1 -172692.00 6 +47364.194 7520.0 C57
2021-03-31 19:14:05 S 10 53 59.078 -34 24 42.98 V C57
2021-03-31 19:14:05 s 1 -172339.42 3 +46448.246 3030.0 C57
2021-03-31 19:24:05 S 10 53 59.249 -34 24 18.22 V C57
2021-03-31 19:24:05 s 1 -171982.70 8 +45531.180 510.0 C57
2021-03-31 19:34:05 S 10 53 58.961 -34 23 54.78 V C57
2021-03-31 19:34:05 s 1 -171621.82 9 +44613.007 9890.0 C57
2021-03-31 19:44:05 S 10 53 59.196 -34 23 31.85 V C57
2021-03-31 19:44:05 s 1 -171256.75 5 +43693.739 1120.0 C57
2021-03-31 19:54:05 S 10 53 58.975 -34 23 06.47 V C57
2021-03-31 19:54:05 s 1 -170887.45 3 +42773.389 4120.0 C57
2021-03-31 20:04:05 S 10 53 59.098 -34 22 45.30 V C57
2021-03-31 20:04:05 s 1 -170513.89 2 +41851.967 8840.0 C57
2021-03-31 20:14:05 S 10 53 59.021 -34 22 20.03 V C57
2021-03-31 20:14:05 s 1 -170136.03 8 +40929.487 5220.0 C57
2021-03-31 20:24:05 S 10 53 59.186 -34 21 57.56 V C57
2021-03-31 20:24:05 s 1 -169753.85 8 +40005.962 3180.0 C57
2021-03-31 20:34:05 S 10 53 59.191 -34 21 33.66 V C57
2021-03-31 20:34:05 s 1 -169367.32 0 +39081.405 2660.0 C57
2021-03-31 20:44:05 S 10 53 59.134 -34 21 09.68 V C57
2021-03-31 20:44:05 s 1 -168976.38 9 +38155.830 3600.0 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)