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
2020-11-22 09:11:01 C 22 40 54.39 +10 58 53.7 q Q21
2020-11-22 09:17:04 C 22 40 54.44 +10 58 40.2 q Q21
2020-11-22 09:23:07 C 22 40 54.55 +10 58 26.7 q Q21
2020-11-22 09:27:39 C 22 40 54.58 +10 58 17.0 q Q21
2020-11-22 17:43:36 C 22 41 14.16 +10 39 44.2 V G17
2020-11-22 17:46:37 C 22 41 14.23 +10 39 37.3 V G17
2020-11-22 17:49:37 C 22 41 14.27 +10 39 30.8 V G17
2020-11-22 19:24:03 C 22 41 16.19 +10 35 58.5 V 160
2020-11-22 19:26:55 C 22 41 16.25 +10 35 51.9 V 160
2020-11-22 19:29:46 C 22 41 16.32 +10 35 45.5 V 160
2020-11-23 08:22:05 C 22 41 50.47 +10 06 58.6 q Q21
2020-11-23 08:25:08 C 22 41 50.53 +10 06 51.9 q Q21
2020-11-23 08:28:09 C 22 41 50.57 +10 06 45.0 q Q21
2020-11-23 08:31:11 C 22 41 50.66 +10 06 38.4 q Q21
2020-11-23 08:34:11 C 22 41 50.70 +10 06 31.1 q Q21
2020-11-23 08:37:14 C 22 41 50.76 +10 06 24.8 q Q21
2020-11-23 08:40:14 C 22 41 50.79 +10 06 18.4 q Q21
2020-11-23 08:43:16 C 22 41 50.88 +10 06 10.9 q Q21
2020-11-23 08:46:18 C 22 41 50.92 +10 06 04.4 q Q21
2020-11-23 08:49:19 C 22 41 50.99 +10 05 57.4 q Q21
2020-11-23 08:59:57 C 22 41 51.20 +10 05 33.3 q Q21
2020-11-23 18:32:08 C 22 42 13.97 +09 43 40.5 V 160
2020-11-23 18:35:04 C 22 42 14.04 +09 43 33.5 V 160
2020-11-23 18:37:58 C 22 42 14.12 +09 43 27.2 V 160
2020-11-26 08:26:18 C 22 45 08.46 +07 17 36.6 q Q21
2020-11-26 08:36:53 C 22 45 08.75 +07 17 10.5 q Q21
2020-11-26 08:45:57 C 22 45 09.00 +07 16 48.8 q Q21
2020-11-26 08:53:31 C 22 45 09.21 +07 16 30.3 q Q21
2020-11-26 09:02:36 C 22 45 09.46 +07 16 07.9 q Q21
2020-11-26 09:10:09 C 22 45 09.69 +07 15 49.6 q Q21
2020-11-27 02:14:46 C 22 46 01.97 +06 33 49.1 V 703
2020-11-27 02:24:38 C 22 46 02.25 +06 33 24.4 V 703
2020-11-27 02:34:30 C 22 46 02.52 +06 32 59.9 V 703
2020-11-27 02:44:22 C 22 46 02.78 +06 32 35.3 V 703
2020-11-27 05:48:21 C 22 46 12.25 +06 25 16.8 V T08
2020-11-27 05:55:41 C 22 46 12.45 +06 24 58.5 V T08
2020-11-27 06:01:40 C 22 46 12.62 +06 24 43.4 V T08
2020-11-27 06:15:38 C 22 46 13.01 +06 24 08.4 V T08
2020-11-28 08:19:57 C 22 47 42.10 +05 17 32.7 q Q21
2020-11-28 08:24:29 C 22 47 42.29 +05 17 22.2 q Q21
2020-11-28 08:29:02 C 22 47 42.46 +05 17 09.4 q Q21
2020-11-28 08:33:33 C 22 47 42.59 +05 16 58.2 q Q21
2020-11-28 08:38:05 C 22 47 42.71 +05 16 46.1 q Q21
2020-11-28 08:42:38 C 22 47 42.89 +05 16 34.9 q Q21
2020-11-28 08:47:11 C 22 47 43.03 +05 16 22.9 q Q21
2020-11-28 08:51:43 C 22 47 43.15 +05 16 11.1 q Q21
2020-11-28 08:56:15 C 22 47 43.33 +05 15 59.5 q Q21
2020-11-28 09:00:48 C 22 47 43.43 +05 15 48.8 q Q21
2020-11-29 05:57:06 C 22 48 54.07 +04 21 35.9 V T05
2020-11-29 06:01:44 C 22 48 54.21 +04 21 23.5 V T05
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)