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
2020-10-07 21:20:04 C 23 22 57.69 +34 37 31.3 q Z36
2020-10-07 21:21:12 C 23 22 57.56 +34 37 30.7 q Z36
2020-10-07 21:22:20 C 23 22 57.44 +34 37 30.5 q Z36
2020-10-07 21:23:29 C 23 22 57.32 +34 37 30.1 q Z36
2020-10-07 21:24:38 C 23 22 57.19 +34 37 29.9 q Z36
2020-10-07 21:25:45 C 23 22 57.07 +34 37 29.5 q Z36
2020-10-07 21:26:53 C 23 22 56.94 +34 37 29.4 q Z36
2020-10-07 21:28:02 C 23 22 56.83 +34 37 29.1 q Z36
2020-10-07 21:29:10 C 23 22 55.85 +34 37 21.6 V 130
2020-10-07 21:29:11 C 23 22 56.71 +34 37 28.8 q Z36
2020-10-07 21:30:18 C 23 22 56.57 +34 37 28.5 q Z36
2020-10-07 21:30:36 C 23 22 55.67 +34 37 21.1 V 130
2020-10-07 21:31:27 C 23 22 56.45 +34 37 28.1 q Z36
2020-10-07 21:32:36 C 23 22 56.33 +34 37 27.7 q Z36
2020-10-07 21:32:45 C 23 22 55.44 +34 37 20.5 V 130
2020-10-07 21:33:44 C 23 22 56.20 +34 37 27.4 q Z36
2020-10-07 21:34:51 C 23 22 56.09 +34 37 27.2 q Z36
2020-10-07 21:34:54 C 23 22 55.21 +34 37 19.8 V 130
2020-10-07 21:36:00 C 23 22 55.95 +34 37 26.9 q Z36
2020-10-07 21:37:09 C 23 22 55.82 +34 37 26.5 q Z36
2020-10-07 21:38:18 C 23 22 55.71 +34 37 26.4 q Z36
2020-10-07 21:39:25 C 23 22 55.58 +34 37 26.2 q Z36
2020-10-07 21:40:33 C 23 22 55.47 +34 37 25.8 q Z36
2020-10-07 21:41:42 C 23 22 55.35 +34 37 25.5 q Z36
2020-10-07 21:42:50 C 23 22 55.22 +34 37 24.9 q Z36
2020-10-07 21:43:58 C 23 22 55.10 +34 37 24.7 q Z36
2020-10-07 21:45:06 C 23 22 54.99 +34 37 24.5 q Z36
2020-10-07 21:46:15 C 23 22 54.86 +34 37 24.3 q Z36
2020-10-07 21:47:24 C 23 22 54.74 +34 37 23.9 q Z36
2020-10-07 21:48:31 C 23 22 54.61 +34 37 23.7 q Z36
2020-10-07 21:49:39 C 23 22 54.49 +34 37 23.4 q Z36
2020-10-07 21:50:48 C 23 22 54.37 +34 37 23.0 q Z36
2020-10-07 21:51:55 C 23 22 54.24 +34 37 22.7 q Z36
2020-10-07 21:53:04 C 23 22 54.14 +34 37 22.4 q Z36
2020-10-07 21:54:12 C 23 22 53.98 +34 37 22.1 q Z36
2020-10-07 21:55:21 C 23 22 53.87 +34 37 21.7 q Z36
2020-10-07 21:56:30 C 23 22 53.73 +34 37 21.5 q Z36
2020-10-07 21:57:37 C 23 22 53.62 +34 37 21.3 q Z36
2020-10-07 21:58:45 C 23 22 53.50 +34 37 20.7 q Z36
2020-10-07 21:59:54 C 23 22 53.37 +34 37 20.6 q Z36
2020-10-07 22:01:01 C 23 22 53.26 +34 37 20.3 q Z36
2020-10-07 22:02:09 C 23 22 53.13 +34 37 20.0 q Z36
2020-10-07 22:03:19 C 23 22 53.01 +34 37 19.6 q Z36
2020-10-07 22:04:27 C 23 22 52.86 +34 37 19.2 q Z36
2020-10-07 22:05:34 C 23 22 52.77 +34 37 19.0 q Z36
2020-10-07 22:06:42 C 23 22 52.65 +34 37 18.7 q Z36
2020-10-07 22:07:51 C 23 22 52.50 +34 37 18.4 q Z36
2020-10-07 22:08:12 C 23 22 51.64 +34 37 11.9 V 160
2020-10-07 22:11:16 C 23 22 51.24 +34 37 10.8 V 160
2020-10-07 22:14:20 C 23 22 50.91 +34 37 09.7 V 160
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)