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
2011-08-22 19:13:11 C 03 36 51.30 +30 11 21.3 c D35
2011-08-22 19:16:30 C 03 36 51.88 +30 11 23.6 c D35
2011-08-22 19:19:49 C 03 36 52.35 +30 11 25.3 c D35
2011-08-22 19:23:07 C 03 36 52.95 +30 11 27.4 c D35
2011-11-02 11:15:57 C 09 38 07.94 +15 45 39.3 r G96
2011-11-02 11:24:15 C 09 38 09.56 +15 45 24.7 r G96
2011-11-02 11:32:40 C 09 38 10.96 +15 45 12.7 r G96
2011-11-02 11:41:07 C 09 38 12.55 +15 44 59.2 r G96
2011-12-04 14:23:28 C 11 46 52.291 -04 46 03.44 L F51
2011-12-04 14:30:08 C 11 46 53.281 -04 46 13.40 L F51
2011-12-04 14:43:29 C 11 46 55.247 -04 46 33.04 L F51
2012-05-12 12:02:59 C 17 23 00.483 -27 46 58.18 L F51
2012-05-12 12:18:16 C 17 22 59.155 -27 46 49.72 L F51
2012-05-18 07:31:31 C 17 10 53.29 -26 22 38.5 H06
2012-05-18 07:34:03 C 17 10 53.07 -26 22 36.7 H06
2012-05-18 07:52:37 C 17 10 51.30 -26 22 25.3 H06
2012-05-18 07:55:07 C 17 10 51.10 -26 22 24.0 H06
2012-05-18 08:03:08 C 17 10 50.13 -26 22 18.5 H06
2012-05-18 08:05:40 C 17 10 49.94 -26 22 16.8 H06
2012-05-22 12:53:22 C 17 01 04.294 -25 13 56.70 t 568
2012-05-22 12:56:08 C 17 01 04.002 -25 13 54.72 t 568
2012-05-22 12:58:54 C 17 01 03.707 -25 13 52.73 t 568
2012-05-28 05:20:53 C 16 47 21.76 -23 34 20.6 o G48
2012-05-28 05:22:16 C 16 47 21.61 -23 34 19.6 o G48
2012-05-28 05:23:38 C 16 47 21.48 -23 34 18.6 o G48
2012-05-29 00:03:16 C 16 45 27.90 -23 20 21.2 t 204
2012-05-29 00:14:23 C 16 45 26.72 -23 20 12.9 t 204
2012-05-29 00:25:36 C 16 45 25.54 -23 20 04.3 t 204
2012-06-07 07:11:19 C 16 24 19.58 -20 32 38.9 t H21
2012-06-07 07:18:24 C 16 24 18.91 -20 32 34.1 t H21
2012-06-07 07:25:29 C 16 24 18.27 -20 32 29.2 t H21
2012-06-08 03:45:00 C 16 22 35.44 -20 17 43.0 o G48
2012-06-08 03:47:42 C 16 22 35.28 -20 17 41.0 o G48
2012-06-08 03:51:50 C 16 22 35.03 -20 17 37.2 o G48
2012-06-09 06:44:06 C 16 20 19.57 -19 58 26.5 r G96
2012-06-09 06:56:22 C 16 20 18.49 -19 58 17.8 r G96
2012-06-09 07:08:46 C 16 20 17.37 -19 58 08.9 r G96
2012-06-09 07:21:13 C 16 20 16.29 -19 58 00.0 r G96
2012-06-13 06:28:54 C 16 12 57.90 -18 52 58.5 19.0 c 704
2012-06-13 06:43:49 C 16 12 56.78 -18 52 47.6 19.3 c 704
2012-06-13 06:58:42 C 16 12 55.52 -18 52 39.6 19.2 c 704
2012-06-13 07:13:46 C 16 12 54.43 -18 52 29.6 18.9 c 704
2012-06-13 07:29:22 C 16 12 53.24 -18 52 17.9 19.0 c 704
2012-06-14 05:28:02 C 16 11 21.47 -18 38 03.9 18.8 c 704
2012-06-14 05:43:05 C 16 11 20.30 -18 37 54.1 19.2 c 704
2012-06-14 05:58:02 C 16 11 19.24 -18 37 44.8 19.1 c 704
2012-06-14 06:13:01 C 16 11 18.06 -18 37 35.1 19.1 c 704
2012-06-14 07:22:03 C 16 11 13.05 -18 36 50.5 o H06
2012-06-14 07:28:37 C 16 11 12.46 -18 36 45.4 o H06
2012-06-14 07:35:10 C 16 11 11.95 -18 36 40.9 o H06
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)