IAA RAS IAA Minor Planet Database

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
2007-09-10 05:39:55 C 22 10 57.54 +18 54 15.3 – r 703
2007-09-10 05:40:56 C 22 10 57.43 +18 54 14.8 – r 703
2007-09-10 07:13:50 C 22 10 47.89 +18 53 52.0 – r 703
2007-09-10 07:26:36 C 22 10 46.59 +18 53 49.0 – r 703
2007-09-10 07:40:24 C 22 10 45.22 +18 53 44.3 – r 703
2007-09-10 07:53:02 C 22 10 43.86 +18 53 41.3 – r 703
2007-09-10 11:28:58 C 22 10 25.34 +18 52 43.9 – m 300
2007-09-10 11:33:18 C 22 10 24.91 +18 52 43.4 – m 300
2007-09-10 11:41:54 C 22 10 24.04 +18 52 40.9 – m 300
2007-09-10 11:44:05 C 22 10 23.80 +18 52 40.5 – m 300
2007-09-10 11:46:16 C 22 10 23.58 +18 52 39.9 – m 300
2007-09-10 11:53:14 C 22 10 22.88 +18 52 37.9 – m 300
2007-09-10 11:55:23 C 22 10 22.67 +18 52 37.5 – m 300
2007-09-10 20:02:04 C 22 09 35.93 +18 50 17.5 – r 084
2007-09-10 23:24:10 C 22 09 15.88 +18 49 21.3 – r 084
2007-09-10 23:29:23 C 22 09 15.37 +18 49 19.7 – r 084
2007-09-11 04:45:09 C 22 08 47.01 +18 48 05.7 17.9 o 698
2007-09-11 05:40:28 C 22 08 41.31 +18 47 50.6 17.4 o 698
2007-09-11 06:07:34 C 22 08 38.55 +18 47 43.0 17.6 o 698
2007-09-11 08:15:57 C 22 08 25.41 +18 47 04.7 17.4 o 698
2007-09-11 08:21:50 C 22 08 24.80 +18 47 02.8 17.4 o 698
2007-09-11 20:25:52 C 22 07 17.76 +18 43 14.3 – r 084
2007-09-11 20:31:06 C 22 07 17.20 +18 43 12.6 – r 084
2007-09-11 22:11:22 C 22 07 07.26 +18 42 41.1 – r 084
2007-09-12 03:03:29 C 22 06 41.62 +18 41 20.7 17.5 o 698
2007-09-12 03:20:02 C 22 06 39.99 +18 41 16.0 17.4 o 698
2007-09-12 03:52:51 C 22 06 36.65 +18 41 06.4 17.5 o 698
2007-09-12 03:58:29 C 22 06 36.07 +18 41 04.7 17.5 o 698
2007-09-12 04:19:44 C 22 06 33.94 +18 40 58.3 17.6 o 698
2007-09-12 05:43:18 C 22 06 25.42 +18 40 32.3 17.6 o 698
2007-09-12 06:11:07 C 22 06 21.96 +18 40 21.0 – r H45
2007-09-12 06:12:19 C 22 06 21.86 +18 40 20.9 – r H45
2007-09-12 06:14:06 C 22 06 21.66 +18 40 20.1 – r H45
2007-09-12 06:15:27 C 22 06 21.54 +18 40 19.7 – r H45
2007-09-12 06:17:10 C 22 06 21.38 +18 40 19.1 – r H45
2007-09-13 03:04:47 C 22 04 26.62 +18 33 16.5 17.6 o 698
2007-09-13 03:16:56 C 22 04 25.44 +18 33 12.6 17.5 o 698
2007-09-13 04:12:57 C 22 04 19.76 +18 32 53.8 17.4 o 698
2007-09-13 04:37:18 C 22 04 17.32 +18 32 45.5 17.5 o 698
2007-09-13 07:08:58 C 22 04 01.93 +18 31 51.5 17.6 o 698
2007-09-13 07:22:03 C 22 04 00.62 +18 31 46.7 17.8 o 698
2007-09-13 08:10:41 C 22 03 55.65 +18 31 28.0 17.5 o 698
2007-09-13 23:56:24 C 22 02 28.06 +18 25 29.8 – c B09
2007-09-14 00:01:10 C 22 02 27.63 +18 25 27.9 – c B09
2007-09-14 02:50:22 C 22 02 14.28 +18 24 26.6 18.2 o 698
2007-09-14 02:50:52 C 22 02 14.20 +18 24 25.4 – o 699
2007-09-14 03:22:05 C 22 02 11.11 +18 24 15.0 17.3 o 698
2007-09-14 03:23:48 C 22 02 10.98 +18 24 13.0 – o 699
2007-09-14 03:28:16 C 22 02 10.53 +18 24 12.7 17.3 o 698
2007-09-14 03:34:17 C 22 02 09.93 +18 24 10.4 17.3 o 698
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)