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
2007-09-19 22:25:14 C 21 49 52.52 +17 16 50.9 c B09
2007-09-19 23:23:03 C 21 49 47.31 +17 16 08.3 r 084
2007-09-20 00:08:34 C 21 49 43.32 +17 15 41.0 r 084
2007-09-20 06:01:01 C 21 49 14.33 +17 12 31.7 r H45
2007-09-20 06:02:08 C 21 49 14.22 +17 12 31.1 r H45
2007-09-20 06:04:03 C 21 49 14.06 +17 12 30.1 r H45
2007-09-20 06:05:26 C 21 49 13.95 +17 12 29.0 r H45
2007-09-20 06:06:45 C 21 49 13.83 +17 12 28.3 r H45
2007-09-20 18:24:49 C 21 48 15.40 +17 05 08.3 o 151
2007-09-20 18:27:00 C 21 48 15.22 +17 05 07.0 o 151
2007-09-20 18:29:11 C 21 48 15.04 +17 05 05.6 o 151
2007-09-20 18:43:07 C 21 48 13.68 +17 04 55.8 r 113
2007-09-20 18:47:51 C 21 48 13.29 +17 04 53.1 r 113
2007-09-20 18:50:12 C 21 48 13.06 +17 04 51.7 r 113
2007-09-20 18:52:35 C 21 48 12.83 +17 04 50.4 r 113
2007-09-21 20:24:13 C 21 46 10.06 +16 49 18.0 o J65
2007-09-21 21:16:57 C 21 46 05.60 +16 48 45.3 o J65
2007-09-21 21:18:39 C 21 46 05.45 +16 48 44.4 o J65
2007-09-24 19:17:09 C 21 40 50.81 +16 02 52.9 r A78
2007-09-24 19:59:50 C 21 40 47.50 +16 02 23.3 r A78
2007-09-24 20:06:30 C 21 40 46.98 +16 02 19.1 r A78
2007-09-24 20:12:51 C 21 40 46.49 +16 02 14.6 r A78
2007-09-24 22:51:29 C 21 40 34.07 +16 00 15.5 r 084
2007-09-28 19:32:38 C 21 34 33.84 +14 53 07.4 r 170
2007-09-28 20:10:45 C 21 34 31.30 +14 52 40.2 r 170
2007-09-28 20:12:36 C 21 34 31.15 +14 52 38.7 r 170
2007-09-28 20:15:40 C 21 34 30.95 +14 52 36.3 r 170
2007-09-29 21:32:02 C 21 33 02.70 +14 33 06.2 r 084
2007-09-29 21:37:16 C 21 33 02.37 +14 33 02.5 r 084
2007-10-01 18:48:10 C 21 30 40.22 +13 57 38.9 r 084
2007-10-01 20:12:21 C 21 30 36.03 +13 56 39.0 c 560
2007-10-01 20:14:00 C 21 30 35.93 +13 56 37.8 c 560
2007-10-01 20:17:48 C 21 30 35.71 +13 56 35.0 c 560
2007-10-02 22:02:41 C 21 29 21.40 +13 35 58.3 c A24
2007-10-04 21:51:35 C 21 27 19.70 +12 57 08.2 c A24
2007-10-04 22:07:24 C 21 27 18.99 +12 56 55.2 c A24
2007-10-04 22:08:49 C 21 27 18.94 +12 56 53.8 c A24
2007-10-06 12:24:12 C 21 25 56.39 +12 25 30.7 o 300
2007-10-06 12:26:50 C 21 25 56.26 +12 25 28.3 o 300
2007-10-06 12:29:31 C 21 25 56.12 +12 25 26.7 o 300
2007-10-06 12:32:11 C 21 25 56.07 +12 25 24.4 o 300
2007-10-06 12:34:53 C 21 25 55.93 +12 25 21.9 o 300
2007-10-06 12:37:31 C 21 25 55.80 +12 25 19.4 o 300
2007-10-08 18:31:53 C 21 24 21.85 +11 40 33.0 r B38
2007-10-08 18:36:42 C 21 24 21.67 +11 40 28.5 r B38
2007-10-08 18:42:40 C 21 24 21.48 +11 40 23.5 r B38
2007-10-08 18:51:23 C 21 24 21.16 +11 40 16.2 r B38
2007-10-14 20:12:14 C 21 22 12.81 +09 40 12.9 18.3 r B15
2007-10-14 20:19:35 C 21 22 12.73 +09 40 06.8 18.2 r B15
2007-10-14 20:24:50 C 21 22 12.68 +09 40 02.4 18.2 r B15
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)