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
2016-07-31 22:13:18 C 19 27 54.29 -05 09 57.1 S G36
2016-07-31 23:52:42 C 19 27 45.24 -05 10 02.0 S G36
2016-08-01 01:47:47 C 19 27 34.85 -05 10 07.4 S G36
2016-08-01 20:38:31 C 19 26 00.10 -05 11 13.1 S G36
2016-08-01 23:10:20 C 19 25 46.58 -05 11 23.1 S G36
2016-08-02 01:36:51 C 19 25 33.59 -05 11 32.1 S G36
2016-08-04 20:39:43 C 19 20 09.27 -05 17 04.5 S G36
2016-08-04 23:21:52 C 19 19 55.88 -05 17 20.7 S G36
2016-08-05 01:01:18 C 19 19 47.69 -05 17 30.6 S G36
2016-08-05 20:28:10 C 19 18 19.79 -05 19 34.0 S G36
2016-08-05 23:10:11 C 19 18 06.82 -05 19 52.1 S G36
2016-08-06 00:49:36 C 19 17 58.88 -05 20 02.9 S G36
2016-08-06 20:32:28 C 19 16 32.59 -05 22 21.0 S G36
2016-08-06 22:27:32 C 19 16 23.64 -05 22 35.1 S G36
2016-08-07 01:04:22 C 19 16 11.55 -05 22 53.9 S G36
2016-08-07 20:31:24 C 19 14 49.50 -05 25 22.5 S G36
2016-08-07 23:08:20 C 19 14 37.72 -05 25 43.4 S G36
2016-08-08 00:42:27 C 19 14 30.70 -05 25 55.3 S G36
2016-08-08 12:12:17 C 19 13 43.96 -05 27 26.8 o 300
2016-08-08 12:49:29 C 19 13 41.26 -05 27 34.0 o 300
2016-08-08 12:58:48 C 19 13 40.53 -05 27 34.4 o 300
2016-08-08 13:01:08 C 19 13 40.38 -05 27 34.5 o 300
2016-08-08 13:03:28 C 19 13 40.18 -05 27 35.1 o 300
2016-08-08 13:05:47 C 19 13 39.95 -05 27 35.2 o 300
2016-08-08 13:08:07 C 19 13 39.81 -05 27 35.6 o 300
2016-08-08 13:10:26 C 19 13 39.68 -05 27 35.7 o 300
2016-08-08 20:13:43 C 19 13 11.41 -05 28 35.7 S G36
2016-08-08 22:35:07 C 19 13 01.17 -05 28 55.9 S G36
2016-08-09 00:51:03 C 19 12 51.43 -05 29 15.0 S G36
2016-09-26 16:50:32 S 19 13 22.406 -09 31 23.05 L C51
2016-09-26 19:59:13 S 19 13 33.065 -09 31 51.28 L C51
2016-09-27 11:42:28 S 19 14 26.940 -09 34 14.34 L C51
2016-09-27 22:42:46 S 19 15 05.287 -09 35 52.08 L C51
2016-09-27 22:42:57 S 19 15 05.282 -09 35 52.69 L C51
2020-07-23 02:03:51 C 23 55 20.10 +14 17 04.0 V C95
2020-07-23 02:17:21 C 23 55 20.74 +14 17 16.0 V C95
2020-07-23 02:30:47 C 23 55 21.32 +14 17 27.2 V C95
2020-07-23 02:44:02 C 23 55 21.90 +14 17 39.2 V C95
2020-07-28 09:15:13 C 00 01 12.69 +16 09 56.8 V 703
2020-07-28 09:19:48 C 00 01 12.78 +16 10 00.9 V 703
2020-07-28 09:24:24 C 00 01 12.93 +16 10 05.3 V 703
2020-07-28 09:29:00 C 00 01 13.21 +16 10 09.6 V 703
2020-07-29 09:41:31 C 00 02 15.79 +16 31 45.9 V G96
2020-07-29 09:49:01 C 00 02 16.06 +16 31 52.8 V G96
2020-07-29 09:56:29 C 00 02 16.36 +16 31 59.6 V G96
2020-07-29 10:03:59 C 00 02 16.64 +16 32 06.1 V G96
2020-08-12 13:45:29 C 00 13 56.95 +21 39 02.4 V T08
2020-08-12 14:22:47 C 00 13 57.66 +21 39 36.9 V T08
2020-08-12 14:27:37 C 00 13 57.74 +21 39 40.6 V T08
2020-08-12 14:35:24 C 00 13 57.90 +21 39 46.7 V T08
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)