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
2007-08-20 12:23:26 C 22 52 02.55 +17 54 41.1 r 300
2007-08-20 12:25:35 C 22 52 02.44 +17 54 43.0 r 300
2007-08-20 12:27:44 C 22 52 02.28 +17 54 43.0 r 300
2007-08-20 12:29:53 C 22 52 02.13 +17 54 45.2 r 300
2007-08-20 12:32:03 C 22 52 02.01 +17 54 45.1 r 300
2007-08-20 12:34:11 C 22 52 01.81 +17 54 46.0 r 300
2007-08-20 12:36:21 C 22 52 01.69 +17 54 46.9 r 300
2007-08-20 12:38:29 C 22 52 01.54 +17 54 48.9 r 300
2007-08-20 12:40:39 C 22 52 01.39 +17 54 49.4 r 300
2007-08-20 12:42:47 C 22 52 01.24 +17 54 50.7 r 300
2007-08-20 12:44:55 C 22 52 01.15 +17 54 51.0 r 300
2007-08-20 12:47:04 C 22 52 01.00 +17 54 52.4 r 300
2007-08-20 12:49:13 C 22 52 00.83 +17 54 53.8 r 300
2007-08-20 12:51:21 C 22 52 00.71 +17 54 54.4 r 300
2007-08-20 12:53:29 C 22 52 00.57 +17 54 55.1 r 300
2007-08-20 12:55:39 C 22 52 00.44 +17 54 56.3 r 300
2007-08-20 12:57:47 C 22 52 00.31 +17 54 58.0 r 300
2007-08-20 13:04:12 C 22 51 59.99 +17 54 59.4 r 300
2007-08-20 13:06:23 C 22 51 59.76 +17 55 00.7 r 300
2007-08-20 13:08:31 C 22 51 59.62 +17 55 02.2 r 300
2007-08-20 13:10:41 C 22 51 59.45 +17 55 02.3 r 300
2007-08-20 13:12:50 C 22 51 59.30 +17 55 04.2 r 300
2007-08-20 13:14:58 C 22 51 59.17 +17 55 05.2 r 300
2007-08-20 13:17:08 C 22 51 59.06 +17 55 06.2 r 300
2007-08-20 13:19:17 C 22 51 58.83 +17 55 07.5 r 300
2007-08-20 13:21:26 C 22 51 58.71 +17 55 07.6 r 300
2007-08-20 13:25:44 C 22 51 58.41 +17 55 10.6 r 300
2007-08-20 13:30:03 C 22 51 58.20 +17 55 12.2 r 300
2007-08-22 09:01:22 C 22 49 10.68 +18 13 03.2 r H45
2007-08-22 09:15:06 C 22 49 09.71 +18 13 08.2 r H45
2007-08-22 09:16:42 C 22 49 09.58 +18 13 08.6 r H45
2007-08-22 09:18:06 C 22 49 09.49 +18 13 09.2 r H45
2007-08-22 09:19:36 C 22 49 09.38 +18 13 09.7 r H45
2007-08-25 19:56:42 C 22 43 23.38 +18 41 15.2 o 151
2007-08-25 20:01:03 C 22 43 23.03 +18 41 16.7 o 151
2007-08-25 20:03:13 C 22 43 22.88 +18 41 17.5 o 151
2007-08-25 20:05:23 C 22 43 22.69 +18 41 18.3 o 151
2007-08-25 20:07:35 C 22 43 22.52 +18 41 19.1 o 151
2007-09-01 00:51:41 C 22 31 17.61 +19 10 32.6 r 084
2007-09-01 00:56:57 C 22 31 17.16 +19 10 32.8 r 084
2007-09-02 19:05:43 C 22 27 35.75 +19 13 15.4 o 151
2007-09-02 19:07:53 C 22 27 35.55 +19 13 16.0 o 151
2007-09-02 19:10:05 C 22 27 35.34 +19 13 16.6 o 151
2007-09-03 22:29:55 C 22 25 05.91 +19 13 35.0 18.2 o B15
2007-09-04 20:43:16 C 22 23 03.83 +19 12 54.9 r 084
2007-09-04 22:33:44 C 22 22 53.16 +19 12 49.4 r 084
2007-09-04 22:38:59 C 22 22 52.59 +19 12 49.3 r 084
2007-09-04 23:19:24 C 22 22 48.73 +19 12 47.1 r 084
2007-09-04 23:24:38 C 22 22 48.22 +19 12 46.7 r 084
2007-09-05 20:15:29 C 22 20 53.11 +19 11 25.3 r 084
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)