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
2007-08-17 17:09:36 C 22 55 51.68 +17 23 29.3 r 300
2007-08-17 17:11:46 C 22 55 51.56 +17 23 30.0 r 300
2007-08-17 17:13:54 C 22 55 51.41 +17 23 31.0 r 300
2007-08-17 17:16:03 C 22 55 51.29 +17 23 31.9 r 300
2007-08-17 17:18:11 C 22 55 51.16 +17 23 33.1 r 300
2007-08-17 17:20:21 C 22 55 51.04 +17 23 34.1 r 300
2007-08-17 17:22:29 C 22 55 50.91 +17 23 35.6 r 300
2007-08-17 17:24:38 C 22 55 50.78 +17 23 35.9 r 300
2007-08-17 17:26:45 C 22 55 50.67 +17 23 36.6 r 300
2007-08-17 17:28:55 C 22 55 50.48 +17 23 37.7 r 300
2007-08-17 17:31:04 C 22 55 50.39 +17 23 40.0 r 300
2007-08-17 17:33:13 C 22 55 50.26 +17 23 40.4 r 300
2007-08-17 17:46:09 C 22 55 49.49 +17 23 47.0 r 300
2007-08-17 17:48:17 C 22 55 49.35 +17 23 47.9 r 300
2007-08-17 17:50:27 C 22 55 49.25 +17 23 49.1 r 300
2007-08-17 17:52:35 C 22 55 49.11 +17 23 50.0 r 300
2007-08-17 17:54:43 C 22 55 49.01 +17 23 50.9 r 300
2007-08-17 17:56:53 C 22 55 48.85 +17 23 52.5 r 300
2007-08-17 17:59:02 C 22 55 48.68 +17 23 53.1 r 300
2007-08-17 18:14:03 C 22 55 47.82 +17 24 00.3 r 300
2007-08-17 18:16:12 C 22 55 47.69 +17 24 01.4 r 300
2007-08-17 18:40:10 C 22 55 46.33 +17 24 12.2 r 300
2007-08-17 18:42:20 C 22 55 46.22 +17 24 13.4 r 300
2007-08-17 18:46:36 C 22 55 45.91 +17 24 15.6 r 300
2007-08-17 18:48:46 C 22 55 45.79 +17 24 17.2 r 300
2007-08-17 18:50:55 C 22 55 45.68 +17 24 18.6 r 300
2007-08-17 18:53:04 C 22 55 45.55 +17 24 19.0 r 300
2007-08-17 18:55:14 C 22 55 45.42 +17 24 20.1 r 300
2007-08-17 18:57:23 C 22 55 45.30 +17 24 20.7 r 300
2007-08-17 18:59:32 C 22 55 45.18 +17 24 22.2 r 300
2007-08-17 19:01:40 C 22 55 45.06 +17 24 23.2 r 300
2007-08-18 20:59:39 C 22 54 21.20 +17 36 48.5 o 151
2007-08-18 21:01:50 C 22 54 21.02 +17 36 49.1 o 151
2007-08-18 21:04:01 C 22 54 20.87 +17 36 49.7 o 151
2007-08-18 21:06:11 C 22 54 20.76 +17 36 51.7 o 151
2007-08-18 21:10:33 C 22 54 20.48 +17 36 54.3 o 151
2007-08-18 21:12:43 C 22 54 20.34 +17 36 55.9 o 151
2007-08-19 22:02:32 C 22 52 53.33 +17 48 15.0 r 084
2007-08-19 22:07:45 C 22 52 53.03 +17 48 17.6 r 084
2007-08-20 00:12:19 C 22 52 45.08 +17 49 12.8 r 084
2007-08-20 00:17:34 C 22 52 44.76 +17 49 15.2 r 084
2007-08-20 12:04:07 C 22 52 03.76 +17 54 32.7 r 300
2007-08-20 12:06:15 C 22 52 03.68 +17 54 33.0 r 300
2007-08-20 12:08:25 C 22 52 03.52 +17 54 34.9 r 300
2007-08-20 12:10:33 C 22 52 03.36 +17 54 35.4 r 300
2007-08-20 12:12:42 C 22 52 03.24 +17 54 36.5 r 300
2007-08-20 12:14:52 C 22 52 03.09 +17 54 37.0 r 300
2007-08-20 12:17:00 C 22 52 02.94 +17 54 38.3 r 300
2007-08-20 12:19:09 C 22 52 02.79 +17 54 39.1 r 300
2007-08-20 12:21:17 C 22 52 02.63 +17 54 39.9 r 300
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)