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
2012-06-14 07:41:44 C 16 11 11.54 -18 36 37.8 o H06
2012-06-14 07:48:19 C 16 11 11.02 -18 36 32.8 o H06
2012-06-14 07:54:51 C 16 11 10.53 -18 36 28.4 o H06
2012-06-14 08:01:22 C 16 11 10.08 -18 36 24.5 o H06
2012-06-14 08:07:55 C 16 11 09.53 -18 36 19.8 o H06
2012-06-14 08:14:33 C 16 11 09.11 -18 36 15.6 o H06
2012-06-15 06:31:52 C 16 09 40.03 -18 22 11.8 r G96
2012-06-15 06:39:18 C 16 09 39.49 -18 22 07.1 r G96
2012-06-15 06:46:49 C 16 09 38.95 -18 22 02.4 r G96
2012-06-15 06:54:25 C 16 09 38.41 -18 21 57.6 r G96
2012-06-23 05:11:18 C 15 59 25.92 -16 36 50.1 18.8 c 704
2012-06-23 05:26:18 C 15 59 25.36 -16 36 42.5 18.8 c 704
2012-06-23 05:34:35 C 15 59 24.93 -16 36 40.8 r 703
2012-06-23 05:40:52 C 15 59 24.54 -16 36 35.9 18.7 c 704
2012-06-23 05:43:41 C 15 59 24.57 -16 36 37.1 r 703
2012-06-23 05:52:45 C 15 59 24.00 -16 36 32.1 r 703
2012-06-23 05:55:33 C 15 59 23.86 -16 36 28.7 18.6 c 704
2012-06-23 05:59:08 C 15 59 23.82 -16 36 28.2 r G96
2012-06-23 06:01:42 C 15 59 23.67 -16 36 27.8 r 703
2012-06-23 06:08:18 C 15 59 23.38 -16 36 23.6 r G96
2012-06-23 06:17:27 C 15 59 22.95 -16 36 19.2 r G96
2012-06-23 06:26:40 C 15 59 22.52 -16 36 14.8 r G96
2012-06-23 07:00:25 C 15 59 21.01 -16 35 58.7 r 703
2012-06-23 07:11:41 C 15 59 20.40 -16 35 53.0 r 703
2012-06-23 07:23:11 C 15 59 19.86 -16 35 47.1 r 703
2012-06-23 07:34:33 C 15 59 19.32 -16 35 40.6 r 703
2016-06-08 13:18:40 C 20 48 57.514 -11 16 19.63 L F51
2016-06-08 13:39:08 C 20 48 57.397 -11 16 09.47 L F51
2016-06-08 13:59:39 C 20 48 57.275 -11 15 59.33 L F51
2016-06-29 11:26:57 C 20 34 22.049 -07 29 16.14 L F51
2016-06-29 11:44:51 C 20 34 20.913 -07 29 09.32 L F51
2016-06-29 12:02:49 C 20 34 19.767 -07 29 02.49 L F51
2016-06-29 12:20:44 C 20 34 18.628 -07 28 55.61 L F51
2016-07-01 02:13:21 C 20 32 00.90 -07 14 48.0 u 104
2016-07-01 02:21:19 C 20 32 00.38 -07 14 45.6 u 104
2016-07-01 02:29:17 C 20 31 59.88 -07 14 42.6 u 104
2016-07-03 15:14:53 C 20 27 59.57 -06 53 07.3 S Q21
2016-07-03 15:18:55 C 20 27 59.27 -06 53 05.6 S Q21
2016-07-03 15:23:58 C 20 27 58.89 -06 53 03.4 S Q21
2016-07-03 15:38:24 C 20 27 57.91 -06 53 01.0 S Q21
2016-07-05 08:35:51 C 20 25 01.77 -06 39 22.3 q 703
2016-07-05 08:38:49 C 20 25 01.55 -06 39 21.3 q G96
2016-07-05 08:43:47 C 20 25 01.17 -06 39 19.0 q 703
2016-07-05 08:48:52 C 20 25 00.76 -06 39 18.1 q G96
2016-07-05 08:51:42 C 20 25 00.51 -06 39 17.6 q 703
2016-07-05 08:58:49 C 20 24 59.97 -06 39 15.0 q G96
2016-07-05 08:59:38 C 20 24 59.89 -06 39 14.9 q 703
2016-07-05 09:08:51 C 20 24 59.18 -06 39 11.7 q G96
2016-07-05 23:16:14 C 20 23 56.45 -06 34 41.7 q C77
2016-07-05 23:29:26 C 20 23 55.64 -06 34 40.0 q C77
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)