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
2007-09-05 20:20:43 C 22 20 52.63 +19 11 25.0 r 084
2007-09-05 22:07:25 C 22 20 42.22 +19 11 16.1 r 084
2007-09-05 22:12:38 C 22 20 41.71 +19 11 15.8 r 084
2007-09-05 23:01:30 C 22 20 36.92 +19 11 11.1 r 084
2007-09-06 12:35:58 C 22 19 22.20 +19 10 04.0 m 300
2007-09-06 12:45:08 C 22 19 21.26 +19 10 03.2 m 300
2007-09-06 12:49:30 C 22 19 20.81 +19 10 02.6 m 300
2007-09-06 12:51:40 C 22 19 20.60 +19 10 02.4 m 300
2007-09-06 12:53:50 C 22 19 20.39 +19 10 02.0 m 300
2007-09-07 06:41:56 C 22 17 38.84 +19 07 51.7 r H45
2007-09-07 06:44:09 C 22 17 38.66 +19 07 51.4 r H45
2007-09-07 06:47:08 C 22 17 38.36 +19 07 50.9 r H45
2007-09-07 06:49:26 C 22 17 38.14 +19 07 50.4 r H45
2007-09-07 06:52:50 C 22 17 37.78 +19 07 50.2 r H45
2007-09-07 18:21:41 C 22 16 32.02 +19 06 06.5 m 300
2007-09-07 18:25:58 C 22 16 31.60 +19 06 05.4 m 300
2007-09-07 18:30:16 C 22 16 31.16 +19 06 04.8 m 300
2007-09-07 18:34:34 C 22 16 30.77 +19 06 03.9 m 300
2007-09-07 18:38:54 C 22 16 30.35 +19 06 03.4 m 300
2007-09-07 19:18:30 C 22 16 29.38 +19 05 52.6 o 151
2007-09-07 19:19:36 C 22 16 29.28 +19 05 52.7 o 151
2007-09-07 19:20:41 C 22 16 29.19 +19 05 52.6 o 151
2007-09-07 19:21:47 C 22 16 29.04 +19 05 52.6 o 151
2007-09-07 19:22:52 C 22 16 28.92 +19 05 52.7 o 151
2007-09-07 19:23:57 C 22 16 28.81 +19 05 52.5 o 151
2007-09-07 19:25:03 C 22 16 28.71 +19 05 52.2 o 151
2007-09-07 20:21:52 C 22 16 22.51 +19 05 39.7 r 084
2007-09-07 20:27:06 C 22 16 21.99 +19 05 38.6 r 084
2007-09-07 22:16:52 C 22 16 11.09 +19 05 20.9 r 084
2007-09-07 22:22:05 C 22 16 10.60 +19 05 20.4 r 084
2007-09-08 00:11:38 C 22 15 59.80 +19 05 00.9 r 084
2007-09-08 20:05:23 C 22 14 08.12 +19 01 27.9 r 084
2007-09-08 20:10:37 C 22 14 07.60 +19 01 27.0 r 084
2007-09-09 00:42:53 C 22 13 40.63 +19 00 30.4 r 084
2007-09-09 18:31:26 C 22 12 01.81 +18 56 46.2 r A78
2007-09-09 18:37:11 C 22 12 01.18 +18 56 44.6 r A78
2007-09-09 18:43:25 C 22 12 00.59 +18 56 43.4 r A78
2007-09-09 18:48:04 C 22 12 00.16 +18 56 42.7 r A78
2007-09-09 18:51:54 C 22 11 59.76 +18 56 41.8 r A78
2007-09-09 20:23:34 C 22 11 50.01 +18 56 15.4 r 084
2007-09-09 20:28:48 C 22 11 49.52 +18 56 14.2 r 084
2007-09-10 00:47:38 C 22 11 23.88 +18 55 09.9 r 084
2007-09-10 03:40:24 C 22 11 09.74 +18 54 42.8 r 703
2007-09-10 03:49:45 C 22 11 08.77 +18 54 40.8 r 703
2007-09-10 03:59:04 C 22 11 07.87 +18 54 38.7 r 703
2007-09-10 04:08:24 C 22 11 06.90 +18 54 36.5 r 703
2007-09-10 05:02:17 C 22 11 01.42 +18 54 24.4 r 703
2007-09-10 05:03:47 C 22 11 01.21 +18 54 23.3 r 703
2007-09-10 05:15:11 C 22 11 00.13 +18 54 21.1 r 703
2007-09-10 05:16:14 C 22 10 59.95 +18 54 20.4 r 703
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)