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
2020-11-11 10:52:24 C 22 35 49.14 +19 36 33.6 – q Q11
2020-11-12 03:32:17 C 22 35 49.78 +19 07 04.5 – V V19
2020-11-12 04:02:59 C 22 35 49.25 +19 06 08.5 – V V19
2020-11-12 04:36:08 C 22 35 48.73 +19 05 07.8 – V V19
2020-11-12 07:09:21 C 22 35 49.56 +19 00 53.7 – V T08
2020-11-12 07:14:39 C 22 35 49.46 +19 00 44.1 – V T08
2020-11-12 07:23:57 C 22 35 49.28 +19 00 26.9 – V T08
2020-11-12 07:41:57 C 22 35 48.98 +18 59 53.8 – V T08
2020-11-12 13:14:38 C 22 35 49.45 +18 49 26.0 – q D95
2020-11-12 13:16:10 C 22 35 49.43 +18 49 23.2 – q D95
2020-11-12 13:22:22 C 22 35 49.39 +18 49 11.5 – q D95
2020-11-12 18:11:06 C 22 35 54.73 +18 40 23.9 – V K85
2020-11-12 18:41:05 C 22 35 54.38 +18 39 29.8 – V K85
2020-11-13 02:34:16 C 22 35 56.72 +18 25 35.3 – V 703
2020-11-13 02:44:33 C 22 35 56.56 +18 25 16.8 – V 703
2020-11-13 02:52:45 C 22 35 56.44 +18 25 01.6 – V 703
2020-11-13 03:00:58 C 22 35 56.31 +18 24 46.5 – V 703
2020-11-13 07:06:53 C 22 35 56.308 +18 17 32.57 – U F51
2020-11-13 07:25:20 C 22 35 56.040 +18 16 58.00 – U F51
2020-11-13 07:43:41 C 22 35 55.791 +18 16 23.55 – U F51
2020-11-13 10:13:18 C 22 35 59.17 +18 11 31.6 – q Q21
2020-11-13 10:17:50 C 22 35 59.10 +18 11 23.1 – q Q21
2020-11-13 10:22:23 C 22 35 59.08 +18 11 14.6 – q Q21
2020-11-13 10:26:55 C 22 35 59.03 +18 11 06.7 – q Q21
2020-11-13 10:31:28 C 22 35 58.94 +18 10 57.8 – q Q21
2020-11-13 10:36:00 C 22 35 58.91 +18 10 49.4 – q Q21
2020-11-13 10:40:33 C 22 35 58.85 +18 10 41.2 – q Q21
2020-11-14 09:34:58 C 22 36 12.10 +17 28 17.8 – q Q21
2020-11-14 09:39:31 C 22 36 12.07 +17 28 09.7 – q Q21
2020-11-14 09:44:03 C 22 36 12.02 +17 28 01.2 – q Q21
2020-11-14 10:54:08 C 22 36 10.55 +17 27 16.2 – t Q62
2020-11-14 11:15:11 C 22 36 10.38 +17 26 36.1 – t Q62
2020-11-14 11:38:54 C 22 36 10.22 +17 25 50.3 – t Q62
2020-11-14 19:22:16 C 22 36 17.92 +17 09 41.0 – V A16
2020-11-14 19:47:47 C 22 36 17.63 +17 08 51.8 – V A16
2020-11-14 20:14:26 C 22 36 17.64 +17 08 02.5 – V A16
2020-11-14 20:40:10 C 22 36 17.59 +17 07 11.7 – V A16
2020-11-15 08:45:36 C 22 36 30.06 +16 44 33.1 – q Q21
2020-11-15 08:50:08 C 22 36 30.03 +16 44 24.5 – q Q21
2020-11-15 08:54:41 C 22 36 30.01 +16 44 15.6 – q Q21
2020-11-15 08:59:13 C 22 36 29.98 +16 44 07.5 – q Q21
2020-11-15 09:03:44 C 22 36 29.95 +16 43 59.0 – q Q21
2020-11-15 09:08:17 C 22 36 29.92 +16 43 50.2 – q Q21
2020-11-15 09:09:48 C 22 36 29.90 +16 43 47.2 – q Q21
2020-11-15 09:14:21 C 22 36 29.88 +16 43 38.7 – q Q21
2020-11-15 09:18:52 C 22 36 29.87 +16 43 29.8 – q Q21
2020-11-15 09:23:24 C 22 36 29.83 +16 43 21.5 – q Q21
2020-11-15 09:27:57 C 22 36 29.80 +16 43 13.1 – q Q21
2020-11-15 09:32:30 C 22 36 29.75 +16 43 04.4 – q Q21
2020-11-15 09:37:02 C 22 36 29.75 +16 42 55.8 – 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)