IAA RAS IAA Minor Planet Database

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
2020-11-04 04:41:03 C 22 38 06.79 +24 20 11.4 – V 703
2020-11-04 09:15:46 C 22 38 03.25 +24 13 16.3 – r P93
2020-11-04 09:20:04 C 22 38 03.00 +24 13 10.5 – r P93
2020-11-04 09:24:22 C 22 38 02.81 +24 13 05.1 – r P93
2020-11-04 09:35:08 C 22 38 02.44 +24 12 48.2 – r P93
2020-11-04 09:37:16 C 22 38 02.25 +24 12 45.0 – r P93
2020-11-04 10:20:47 C 22 37 59.83 +24 11 39.0 – q Q21
2020-11-04 10:28:31 C 22 37 59.50 +24 11 27.6 – q Q21
2020-11-04 10:36:14 C 22 37 59.25 +24 11 14.9 – q Q21
2020-11-04 10:42:24 C 22 37 58.91 +24 11 05.8 – q Q21
2020-11-04 17:51:58 C 22 37 49.83 +23 59 57.5 – V K85
2020-11-04 19:18:34 C 22 37 46.49 +23 57 47.0 – V K85
2020-11-05 07:26:30 C 22 37 27.874 +23 39 49.11 – U F51
2020-11-05 07:45:15 C 22 37 27.079 +23 39 19.37 – U F51
2020-11-05 08:04:05 C 22 37 26.292 +23 38 49.34 – U F51
2020-11-05 08:22:53 C 22 37 25.528 +23 38 19.17 – U F51
2020-11-05 08:48:02 C 22 37 29.52 +23 37 23.3 – q Q21
2020-11-05 08:54:15 C 22 37 29.26 +23 37 13.9 – q Q21
2020-11-05 09:02:04 C 22 37 28.96 +23 37 02.4 – q Q21
2020-11-05 09:08:16 C 22 37 28.70 +23 36 52.7 – q Q21
2020-11-05 09:14:31 C 22 37 28.46 +23 36 43.4 – q Q21
2020-11-05 09:20:45 C 22 37 28.19 +23 36 34.1 – q Q21
2020-11-05 09:26:59 C 22 37 27.94 +23 36 24.7 – q Q21
2020-11-05 09:33:14 C 22 37 27.70 +23 36 15.3 – q Q21
2020-11-05 09:39:29 C 22 37 27.44 +23 36 05.5 – q Q21
2020-11-05 09:45:42 C 22 37 27.18 +23 35 56.2 – q Q21
2020-11-05 09:53:33 C 22 37 26.88 +23 35 44.1 – q Q21
2020-11-06 20:10:03 C 22 36 45.26 +22 41 50.2 – V 160
2020-11-06 20:12:53 C 22 36 45.17 +22 41 45.6 – V 160
2020-11-06 20:15:43 C 22 36 45.07 +22 41 41.0 – V 160
2020-11-07 17:31:39 C 22 36 28.08 +22 07 32.9 – q K73
2020-11-07 17:41:09 C 22 36 27.73 +22 07 17.7 – q K73
2020-11-07 17:49:49 C 22 36 27.48 +22 07 04.2 – q K73
2020-11-07 19:14:20 C 22 36 25.26 +22 04 42.8 – V 160
2020-11-07 19:17:44 C 22 36 25.15 +22 04 37.1 – V 160
2020-11-07 19:20:39 C 22 36 25.07 +22 04 32.4 – V 160
2020-11-07 23:29:11 C 22 36 23.82 +21 57 49.9 – q I34
2020-11-08 00:03:28 C 22 36 22.51 +21 56 56.2 – q I34
2020-11-08 00:35:19 C 22 36 21.52 +21 56 04.3 – q I34
2020-11-08 08:43:28 C 22 36 17.36 +21 42 46.0 – q Q21
2020-11-08 08:49:45 C 22 36 17.21 +21 42 36.2 – q Q21
2020-11-08 08:56:02 C 22 36 16.98 +21 42 25.8 – q Q21
2020-11-08 09:02:14 C 22 36 16.83 +21 42 15.7 – q Q21
2020-11-08 09:08:28 C 22 36 16.61 +21 42 05.7 – q Q21
2020-11-08 09:14:41 C 22 36 16.43 +21 41 55.6 – q Q21
2020-11-08 09:20:56 C 22 36 16.25 +21 41 45.2 – q Q21
2020-11-08 09:27:11 C 22 36 16.05 +21 41 35.5 – q Q21
2020-11-08 09:31:51 C 22 36 15.90 +21 41 27.8 – q Q21
2020-11-08 09:39:40 C 22 36 15.66 +21 41 15.0 – q Q21
2020-11-08 09:41:17 C 22 36 15.61 +21 41 12.0 – q Q21
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)