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
2020-12-05 09:22:40 C 22 58 58.60 -02 45 22.3 V P87
2020-12-05 09:27:20 C 22 58 58.84 -02 45 37.2 V P87
2020-12-05 09:32:00 C 22 58 59.10 -02 45 51.9 V P87
2020-12-05 12:44:49 C 22 59 09.29 -02 56 07.3 q Q21
2020-12-05 12:52:24 C 22 59 09.64 -02 56 31.0 q Q21
2020-12-06 02:18:22 C 23 00 17.01 -03 39 35.6 o 691
2020-12-06 02:35:59 C 23 00 17.99 -03 40 31.1 o 691
2020-12-06 02:36:50 C 23 00 18.60 -03 40 38.8 U I41
2020-12-06 02:38:11 C 23 00 18.67 -03 40 43.2 U I41
2020-12-06 02:51:44 C 23 00 18.76 -03 41 23.5 o 691
2020-12-06 03:34:50 C 23 00 21.04 -03 43 44.0 V 703
2020-12-06 03:42:24 C 23 00 21.49 -03 44 08.3 V 703
2020-12-06 03:49:59 C 23 00 21.92 -03 44 33.0 V 703
2020-12-06 03:57:33 C 23 00 22.33 -03 44 57.6 V 703
2020-12-06 04:43:31 C 23 00 25.62 -03 47 28.7 U I41
2020-12-06 04:44:50 C 23 00 25.70 -03 47 33.0 U I41
2020-12-06 08:24:26 C 23 00 48.14 -03 59 33.9 q Q21
2020-12-06 08:25:56 C 23 00 48.22 -03 59 39.4 q Q21
2020-12-06 08:30:29 C 23 00 48.45 -03 59 54.2 q Q21
2020-12-06 08:35:01 C 23 00 48.69 -04 00 09.0 q Q21
2020-12-06 08:48:39 C 23 00 49.44 -04 00 52.8 q Q21
2020-12-06 08:53:11 C 23 00 49.64 -04 01 08.4 q Q21
2020-12-06 09:02:14 C 23 00 50.17 -04 01 37.8 q Q21
2020-12-07 06:00:25 C 23 02 30.55 -05 10 41.7 V T05
2020-12-07 06:04:24 C 23 02 30.77 -05 10 54.8 V T05
2020-12-07 06:14:21 C 23 02 31.31 -05 11 28.2 V T05
2020-12-07 06:29:44 C 23 02 32.16 -05 12 19.7 V T05
2020-12-07 08:31:33 C 23 02 46.33 -05 19 37.4 q Q21
2020-12-07 08:36:05 C 23 02 46.59 -05 19 53.0 q Q21
2020-12-07 08:40:38 C 23 02 46.82 -05 20 07.9 q Q21
2020-12-07 08:45:10 C 23 02 47.01 -05 20 22.7 q Q21
2020-12-07 08:49:43 C 23 02 47.29 -05 20 39.1 q Q21
2020-12-07 08:57:16 C 23 02 47.73 -05 21 04.2 q Q21
2020-12-07 09:13:08 C 23 02 48.67 -05 21 57.5 q Q21
2020-12-07 09:18:42 C 23 02 48.98 -05 22 16.3 q Q21
2020-12-08 01:53:58 C 23 04 13.29 -06 18 45.1 V G96
2020-12-08 02:02:03 C 23 04 13.79 -06 19 12.6 V G96
2020-12-08 02:10:07 C 23 04 14.24 -06 19 40.5 V G96
2020-12-08 02:18:11 C 23 04 14.71 -06 20 08.3 V G96
2020-12-09 06:27:53 C 23 06 40.60 -07 58 39.1 V T08
2020-12-09 06:32:31 C 23 06 40.88 -07 58 55.5 V T08
2020-12-09 06:40:29 C 23 06 41.39 -07 59 23.6 V T08
2020-12-09 06:51:50 C 23 06 42.12 -08 00 03.7 V T08
2020-12-09 06:55:10 C 23 06 42.30 -08 00 15.5 V T08
2020-12-09 06:56:29 C 23 06 42.41 -08 00 20.0 V T08
2020-12-09 07:04:27 C 23 06 42.94 -08 00 48.7 V T08
2020-12-09 07:22:27 C 23 06 44.11 -08 01 52.4 V T08
2020-12-09 09:19:26 C 23 06 58.84 -08 09 24.9 q Q21
2020-12-09 09:22:26 C 23 06 59.09 -08 09 35.1 q Q21
2020-12-09 09:28:29 C 23 06 59.48 -08 09 56.7 q Q21
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)