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
2020-10-19 04:53:19 C 22 58 46.66 +32 00 06.9 V 703
2020-10-19 07:46:34 C 22 58 33.09 +31 57 49.8 V T08
2020-10-19 07:57:27 C 22 58 32.02 +31 57 40.4 V T08
2020-10-19 08:00:06 C 22 58 31.76 +31 57 38.1 V T08
2020-10-19 08:02:06 C 22 58 31.59 +31 57 36.0 V T08
2020-10-19 08:10:57 C 22 58 30.70 +31 57 28.3 V T08
2020-10-19 08:23:24 C 22 58 29.48 +31 57 17.2 V T08
2020-10-19 08:24:04 C 22 58 29.42 +31 57 16.5 V T08
2020-10-19 08:40:49 C 22 58 27.79 +31 57 01.4 V T08
2020-10-19 20:51:19 C 22 57 31.81 +31 45 51.5 V 160
2020-10-19 20:54:21 C 22 57 31.54 +31 45 48.8 V 160
2020-10-19 20:57:24 C 22 57 31.26 +31 45 45.9 V 160
2020-10-20 10:48:29 C 22 56 29.17 +31 33 17.1 q Q21
2020-10-20 10:56:14 C 22 56 28.48 +31 33 10.0 q Q21
2020-10-20 11:03:59 C 22 56 27.75 +31 33 03.1 q Q21
2020-10-20 11:11:44 C 22 56 27.03 +31 32 55.9 q Q21
2020-10-20 11:19:27 C 22 56 26.33 +31 32 48.9 q Q21
2020-10-20 11:27:14 C 22 56 25.60 +31 32 41.9 q Q21
2020-10-20 11:35:00 C 22 56 24.89 +31 32 34.6 q Q21
2020-10-20 11:42:45 C 22 56 24.17 +31 32 27.5 q Q21
2020-10-20 11:50:30 C 22 56 23.46 +31 32 20.2 q Q21
2020-10-20 20:50:15 C 22 55 42.64 +31 23 48.7 V 160
2020-10-20 20:53:11 C 22 55 42.37 +31 23 45.8 V 160
2020-10-20 20:56:06 C 22 55 42.11 +31 23 42.9 V 160
2020-10-21 08:04:09 C 22 54 52.62 +31 13 30.6 V T05
2020-10-21 08:10:57 C 22 54 52.00 +31 13 24.0 V T05
2020-10-21 08:25:26 C 22 54 50.66 +31 13 09.7 V T05
2020-10-21 08:38:33 C 22 54 49.46 +31 12 56.4 V T05
2020-10-21 09:30:17 C 22 54 49.16 +31 11 47.5 q Q21
2020-10-21 09:37:59 C 22 54 48.48 +31 11 40.5 q Q21
2020-10-22 04:07:13 C 22 53 27.55 +30 53 36.5 U I41
2020-10-22 04:08:32 C 22 53 27.43 +30 53 35.2 U I41
2020-10-22 05:24:06 C 22 53 20.78 +30 52 19.2 U I41
2020-10-22 05:25:28 C 22 53 20.67 +30 52 17.8 U I41
2020-10-22 06:59:03 C 22 53 15.251 +30 50 58.19 U F51
2020-10-22 07:07:41 C 22 53 14.476 +30 50 49.59 U F51
2020-10-22 07:16:13 C 22 53 13.702 +30 50 40.99 U F51
2020-10-22 07:26:05 C 22 53 12.816 +30 50 31.03 U F51
2020-10-22 07:51:34 C 22 53 10.53 +30 50 05.1 V T05
2020-10-22 07:56:53 C 22 53 10.05 +30 49 59.5 V T05
2020-10-22 08:02:11 C 22 53 09.58 +30 49 54.0 V T05
2020-10-22 08:07:37 C 22 53 09.09 +30 49 48.5 V T05
2020-10-22 08:11:00 C 22 53 08.79 +30 49 45.0 V T05
2020-10-22 08:18:18 C 22 53 08.12 +30 49 37.4 V T05
2020-10-22 08:26:58 C 22 53 07.38 +30 49 28.3 V T05
2020-10-22 08:32:36 C 22 53 06.88 +30 49 22.4 V T05
2020-10-23 09:46:22 C 22 51 21.85 +30 23 18.4 V T08
2020-10-23 09:51:44 C 22 51 21.41 +30 23 12.3 V T08
2020-10-23 10:15:36 C 22 51 19.48 +30 22 44.9 V T08
2020-10-23 10:39:04 C 22 51 17.60 +30 22 17.8 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)