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
2007-08-14 16:30:31 C 22 59 26.11 +16 45 20.9 m 355
2007-08-14 16:45:44 C 22 59 25.40 +16 45 29.6 m 355
2007-08-14 16:52:15 C 22 59 25.03 +16 45 33.6 m 355
2007-08-14 22:25:10 C 22 59 10.91 +16 48 32.4 r 157
2007-08-14 22:30:29 C 22 59 10.66 +16 48 35.3 r 157
2007-08-15 01:12:19 C 22 59 02.41 +16 50 03.6 18.9 r 130
2007-08-15 01:16:05 C 22 59 02.22 +16 50 05.3 18.8 r 130
2007-08-15 01:19:50 C 22 59 02.03 +16 50 07.3 18.7 r 130
2007-08-15 01:24:01 C 22 59 01.80 +16 50 10.1 18.7 r 130
2007-08-17 15:39:03 C 22 55 57.05 +17 22 44.5 r 300
2007-08-17 15:41:11 C 22 55 56.96 +17 22 45.2 r 300
2007-08-17 15:43:21 C 22 55 56.83 +17 22 46.9 r 300
2007-08-17 15:45:30 C 22 55 56.68 +17 22 47.2 r 300
2007-08-17 15:47:38 C 22 55 56.57 +17 22 48.2 r 300
2007-08-17 15:49:46 C 22 55 56.43 +17 22 49.7 r 300
2007-08-17 15:51:56 C 22 55 56.28 +17 22 50.7 r 300
2007-08-17 15:54:05 C 22 55 56.16 +17 22 51.3 r 300
2007-08-17 15:56:13 C 22 55 56.05 +17 22 53.3 r 300
2007-08-17 15:58:22 C 22 55 55.89 +17 22 54.0 r 300
2007-08-17 16:00:30 C 22 55 55.80 +17 22 55.2 r 300
2007-08-17 16:02:39 C 22 55 55.66 +17 22 56.3 r 300
2007-08-17 16:04:48 C 22 55 55.56 +17 22 56.8 r 300
2007-08-17 16:06:55 C 22 55 55.39 +17 22 58.0 r 300
2007-08-17 16:09:05 C 22 55 55.29 +17 22 58.9 r 300
2007-08-17 16:11:14 C 22 55 55.15 +17 23 00.4 r 300
2007-08-17 16:13:22 C 22 55 55.01 +17 23 01.2 r 300
2007-08-17 16:15:32 C 22 55 54.88 +17 23 02.4 r 300
2007-08-17 16:17:41 C 22 55 54.77 +17 23 03.4 r 300
2007-08-17 16:19:50 C 22 55 54.63 +17 23 04.3 r 300
2007-08-17 16:22:17 C 22 55 54.49 +17 23 05.4 r 300
2007-08-17 16:24:25 C 22 55 54.38 +17 23 06.6 r 300
2007-08-17 16:26:34 C 22 55 54.24 +17 23 07.8 r 300
2007-08-17 16:28:43 C 22 55 54.10 +17 23 09.2 r 300
2007-08-17 16:30:51 C 22 55 53.99 +17 23 09.8 r 300
2007-08-17 16:33:01 C 22 55 53.85 +17 23 11.1 r 300
2007-08-17 16:35:09 C 22 55 53.71 +17 23 12.0 r 300
2007-08-17 16:39:26 C 22 55 53.47 +17 23 13.9 r 300
2007-08-17 16:41:34 C 22 55 53.34 +17 23 15.0 r 300
2007-08-17 16:43:44 C 22 55 53.20 +17 23 16.4 r 300
2007-08-17 16:45:54 C 22 55 53.09 +17 23 17.5 r 300
2007-08-17 16:48:04 C 22 55 52.96 +17 23 18.3 r 300
2007-08-17 16:50:14 C 22 55 52.85 +17 23 19.4 r 300
2007-08-17 16:52:24 C 22 55 52.68 +17 23 20.3 r 300
2007-08-17 16:54:33 C 22 55 52.59 +17 23 21.6 r 300
2007-08-17 16:56:43 C 22 55 52.45 +17 23 22.7 r 300
2007-08-17 16:58:52 C 22 55 52.30 +17 23 23.7 r 300
2007-08-17 17:01:01 C 22 55 52.20 +17 23 24.7 r 300
2007-08-17 17:03:10 C 22 55 52.05 +17 23 26.2 r 300
2007-08-17 17:05:19 C 22 55 51.95 +17 23 26.8 r 300
2007-08-17 17:07:28 C 22 55 51.81 +17 23 27.8 r 300
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)