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
2020-11-29 06:10:22 C 22 48 54.49 +04 21 00.6 V T05
2020-11-29 17:36:01 C 22 49 38.11 +03 49 52.4 V G33
2020-11-29 17:36:57 C 22 49 38.16 +03 49 49.9 V G33
2020-11-29 17:37:52 C 22 49 38.17 +03 49 47.3 V G33
2020-11-29 17:38:48 C 22 49 38.20 +03 49 44.9 V G33
2020-11-29 17:38:55 C 22 49 38.36 +03 49 45.0 V K85
2020-11-29 17:39:44 C 22 49 38.24 +03 49 42.3 V G33
2020-11-29 17:40:40 C 22 49 38.30 +03 49 39.8 V G33
2020-11-29 18:38:39 C 22 49 40.29 +03 47 14.1 V 160
2020-11-29 18:41:17 C 22 49 40.95 +03 46 57.9 V K85
2020-11-29 18:41:48 C 22 49 40.45 +03 47 05.5 V 160
2020-11-29 18:44:48 C 22 49 40.55 +03 46 57.5 V 160
2020-11-29 19:16:36 C 22 49 41.85 +03 45 32.2 V G17
2020-11-29 19:19:36 C 22 49 41.94 +03 45 24.1 V G17
2020-11-29 19:22:36 C 22 49 42.07 +03 45 15.5 V G17
2020-11-30 18:26:00 C 22 51 09.14 +02 42 33.3 V 160
2020-11-30 18:28:54 C 22 51 09.27 +02 42 25.6 V 160
2020-11-30 18:31:51 C 22 51 09.41 +02 42 17.3 V 160
2020-12-01 06:55:39 C 22 51 54.77 +02 08 27.7 V T08
2020-12-01 07:00:58 C 22 51 54.99 +02 08 12.6 V T08
2020-12-01 08:18:56 C 22 51 58.52 +02 04 33.2 V T08
2020-12-01 08:26:54 C 22 51 58.92 +02 04 10.8 V T08
2020-12-02 07:07:11 C 22 53 31.00 +00 59 41.9 V T08
2020-12-02 07:11:51 C 22 53 31.20 +00 59 28.3 V T08
2020-12-02 07:25:08 C 22 53 31.83 +00 58 50.0 V T08
2020-12-02 07:44:27 C 22 53 32.74 +00 57 54.1 V T08
2020-12-03 03:31:05 C 22 54 56.89 -00 00 16.7 V 703
2020-12-03 03:38:39 C 22 54 57.33 -00 00 39.2 V 703
2020-12-03 03:46:14 C 22 54 57.66 -00 01 01.3 V 703
2020-12-03 03:53:48 C 22 54 58.03 -00 01 24.0 V 703
2020-12-03 06:50:28 C 22 55 10.28 -00 09 48.5 V T05
2020-12-03 06:55:46 C 22 55 10.54 -00 10 04.3 V T05
2020-12-03 07:05:39 C 22 55 11.00 -00 10 33.5 V T05
2020-12-03 07:21:30 C 22 55 11.79 -00 11 20.8 V T05
2020-12-04 02:55:36 C 22 56 38.89 -01 10 36.2 V 703
2020-12-04 03:03:14 C 22 56 39.18 -01 11 00.5 V 703
2020-12-04 03:10:52 C 22 56 39.58 -01 11 23.8 V 703
2020-12-04 03:18:30 C 22 56 39.96 -01 11 46.8 V 703
2020-12-04 08:25:29 C 22 57 06.07 -01 27 33.3 q Q21
2020-12-04 08:30:02 C 22 57 06.23 -01 27 47.3 q Q21
2020-12-04 08:34:34 C 22 57 06.46 -01 28 00.9 q Q21
2020-12-04 08:39:07 C 22 57 06.69 -01 28 14.9 q Q21
2020-12-04 08:43:39 C 22 57 06.87 -01 28 28.0 q Q21
2020-12-04 08:48:10 C 22 57 07.14 -01 28 42.7 q Q21
2020-12-04 08:49:42 C 22 57 07.20 -01 28 46.6 q Q21
2020-12-04 08:52:43 C 22 57 07.32 -01 28 57.2 q Q21
2020-12-04 08:55:45 C 22 57 07.39 -01 29 08.0 q Q21
2020-12-04 09:00:17 C 22 57 07.70 -01 29 19.5 q Q21
2020-12-04 09:04:50 C 22 57 07.91 -01 29 34.0 q Q21
2020-12-04 09:09:21 C 22 57 08.15 -01 29 48.3 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)