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
2021-03-13 15:24:06 S 10 38 11.587 -49 30 04.72 V C57
2021-03-13 15:24:06 s 1 -44740.112 0 +376655.00 2390.0 C57
2021-03-13 15:34:06 S 10 38 11.849 -49 29 42.50 V C57
2021-03-13 15:34:06 s 1 -45105.350 0 +376614.05 2150.0 C57
2021-03-13 15:44:06 S 10 38 12.499 -49 29 27.31 V C57
2021-03-13 15:44:06 s 1 -45470.480 0 +376572.09 1770.0 C57
2021-03-13 15:54:06 S 10 38 12.370 -49 29 06.36 V C57
2021-03-13 15:54:06 s 1 -45835.501 0 +376529.14 1240.0 C57
2021-03-13 16:04:06 S 10 38 12.485 -49 28 49.76 V C57
2021-03-13 16:04:06 s 1 -46200.412 0 +376485.19 560.0 C57
2021-03-13 16:14:06 S 10 38 12.960 -49 28 33.71 V C57
2021-03-13 16:14:06 s 1 -46565.212 0 +376440.24 9730.0 C57
2021-03-13 16:24:06 S 10 38 13.231 -49 28 15.17 V C57
2021-03-13 16:24:06 s 1 -46929.901 0 +376394.30 8750.0 C57
2021-03-13 16:34:06 S 10 38 13.850 -49 27 57.67 V C57
2021-03-13 16:34:06 s 1 -47294.476 0 +376347.36 7610.0 C57
2021-03-13 16:44:06 S 10 38 14.155 -49 27 39.49 V C57
2021-03-13 16:44:06 s 1 -47658.938 0 +376299.42 6320.0 C57
2021-03-13 16:54:06 S 10 38 14.045 -49 27 24.84 V C57
2021-03-13 16:54:06 s 1 -48023.285 0 +376250.48 4880.0 C57
2021-03-13 17:04:06 S 10 38 14.220 -49 27 08.21 V C57
2021-03-13 17:04:06 s 1 -48387.517 0 +376200.55 3270.0 C57
2021-03-13 17:14:06 S 10 38 14.270 -49 26 46.75 V C57
2021-03-13 17:14:06 s 1 -48751.631 0 +376149.62 1500.0 C57
2021-03-13 17:24:06 S 10 38 14.978 -49 26 31.67 V C57
2021-03-13 17:24:06 s 1 -49115.629 0 +376097.69 9570.0 C57
2021-03-13 17:34:06 S 10 38 15.216 -49 26 17.27 V C57
2021-03-13 17:34:06 s 1 -49479.507 0 +376044.76 7470.0 C57
2021-03-13 17:44:06 S 10 38 15.578 -49 25 55.96 V C57
2021-03-13 17:44:06 s 1 -49843.267 0 +375990.84 5210.0 C57
2021-03-13 17:54:06 S 10 38 15.461 -49 25 40.15 V C57
2021-03-13 17:54:06 s 1 -50206.905 0 +375935.93 2780.0 C57
2021-03-13 18:04:06 S 10 38 16.054 -49 25 23.88 V C57
2021-03-13 18:04:06 s 1 -50570.423 0 +375880.01 170.0 C57
2021-03-13 18:14:06 S 10 38 16.349 -49 25 05.70 V C57
2021-03-13 18:14:06 s 1 -50933.818 0 +375823.10 7390.0 C57
2021-03-13 18:24:06 S 10 38 16.414 -49 24 49.10 V C57
2021-03-13 18:24:06 s 1 -51297.089 0 +375765.20 4440.0 C57
2021-03-13 18:34:06 S 10 38 16.894 -49 24 29.63 V C57
2021-03-13 18:34:06 s 1 -51660.237 0 +375706.30 1310.0 C57
2021-03-13 18:44:06 S 10 38 16.903 -49 24 14.90 V C57
2021-03-13 18:44:06 s 1 -52023.259 0 +375646.40 8000.0 C57
2021-03-13 18:54:06 S 10 38 17.482 -49 23 53.95 V C57
2021-03-13 18:54:06 s 1 -52386.155 0 +375585.50 4510.0 C57
2021-03-13 19:04:06 S 10 38 17.760 -49 23 40.24 V C57
2021-03-13 19:04:06 s 1 -52748.923 0 +375523.61 840.0 C57
2021-03-13 19:14:06 S 10 38 17.827 -49 23 18.67 V C57
2021-03-13 19:14:06 s 1 -53111.564 0 +375460.73 6980.0 C57
2021-03-13 19:24:06 S 10 38 17.758 -49 23 02.62 V C57
2021-03-13 19:24:06 s 1 -53474.075 0 +375396.85 2930.0 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)