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
2020-10-23 18:15:12 C 22 50 52.65 +30 13 49.3 V K85
2020-10-23 18:46:12 C 22 50 50.24 +30 13 17.3 V K85
2020-10-24 04:08:18 C 22 50 12.41 +30 03 33.4 V 703
2020-10-24 04:16:26 C 22 50 11.77 +30 03 24.6 V 703
2020-10-24 04:23:57 C 22 50 11.55 +30 03 15.1 U I41
2020-10-24 04:24:34 C 22 50 11.08 +30 03 15.8 V 703
2020-10-24 04:25:30 C 22 50 11.42 +30 03 13.3 U I41
2020-10-24 04:32:00 C 22 50 10.47 +30 03 07.2 V G96
2020-10-24 04:32:42 C 22 50 10.41 +30 03 06.7 V 703
2020-10-24 04:38:08 C 22 50 09.96 +30 03 00.5 V G96
2020-10-24 04:44:17 C 22 50 09.47 +30 02 53.6 V G96
2020-10-24 04:50:25 C 22 50 08.96 +30 02 47.4 V G96
2020-10-24 07:32:15 C 22 49 58.873 +30 00 04.09 U F51
2020-10-24 07:40:24 C 22 49 55.83 +29 59 32.1 U I41
2020-10-24 07:41:45 C 22 49 55.73 +29 59 30.6 U I41
2020-10-24 07:42:16 C 22 49 58.036 +29 59 52.96 U F51
2020-10-24 07:52:14 C 22 49 57.201 +29 59 41.87 U F51
2020-10-24 08:02:10 C 22 49 56.376 +29 59 30.72 U F51
2020-10-25 08:41:48 C 22 48 23.52 +29 32 02.1 V T05
2020-10-25 08:47:05 C 22 48 23.11 +29 31 55.8 V T05
2020-10-25 08:56:19 C 22 48 22.38 +29 31 44.8 V T05
2020-10-25 08:58:09 C 22 48 26.77 +29 31 24.6 q Q21
2020-10-25 09:02:47 C 22 48 26.42 +29 31 19.4 q Q21
2020-10-25 09:07:28 C 22 48 26.06 +29 31 14.6 q Q21
2020-10-25 09:11:12 C 22 48 21.22 +29 31 26.9 V T05
2020-10-25 09:12:05 C 22 48 25.73 +29 31 09.7 q Q21
2020-10-25 09:16:43 C 22 48 25.35 +29 31 04.8 q Q21
2020-10-25 09:21:21 C 22 48 24.99 +29 30 59.7 q Q21
2020-10-25 09:25:57 C 22 48 24.66 +29 30 54.8 q Q21
2020-10-25 09:30:35 C 22 48 24.28 +29 30 49.4 q Q21
2020-10-25 09:35:14 C 22 48 23.95 +29 30 44.6 q Q21
2020-10-25 09:39:49 C 22 48 23.64 +29 30 39.6 q Q21
2020-10-25 09:44:28 C 22 48 23.25 +29 30 34.9 q Q21
2020-10-25 09:49:07 C 22 48 22.91 +29 30 29.5 q Q21
2020-10-25 09:53:42 C 22 48 22.52 +29 30 24.2 q Q21
2020-10-25 09:58:21 C 22 48 22.19 +29 30 19.2 q Q21
2020-10-25 10:02:59 C 22 48 21.82 +29 30 14.1 q Q21
2020-10-25 10:07:37 C 22 48 21.45 +29 30 09.3 q Q21
2020-10-25 10:12:14 C 22 48 21.12 +29 30 04.0 q Q21
2020-10-25 10:16:52 C 22 48 20.77 +29 29 58.9 q Q21
2020-10-25 10:21:30 C 22 48 20.41 +29 29 53.8 q Q21
2020-10-25 10:26:07 C 22 48 20.04 +29 29 48.3 q Q21
2020-10-25 10:29:13 C 22 48 19.81 +29 29 45.2 q Q21
2020-10-26 21:48:53 C 22 46 15.47 +28 48 16.0 V Z80
2020-10-26 21:52:13 C 22 46 15.25 +28 48 11.8 V Z80
2020-10-26 21:55:34 C 22 46 15.00 +28 48 07.9 V Z80
2020-10-27 02:21:44 C 22 46 03.45 +28 43 06.8 U I41
2020-10-27 02:34:48 C 22 46 02.52 +28 42 51.7 U I41
2020-10-27 03:17:16 C 22 45 59.46 +28 42 02.1 U I41
2020-10-27 03:21:00 C 22 45 58.76 +28 41 59.7 V 703
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)