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
2007-09-14 03:56:46 C 22 02 07.70 +18 24 00.8 o 699
2007-09-14 04:10:00 C 22 02 06.34 +18 23 57.3 17.4 o 698
2007-09-14 06:00:57 C 22 01 55.22 +18 23 14.6 17.5 o 698
2007-09-14 08:10:43 C 22 01 42.16 +18 22 22.1 17.2 o 698
2007-09-14 09:17:58 C 22 01 35.57 +18 21 53.6 17.1 o 698
2007-09-14 10:14:31 C 22 01 30.09 +18 21 29.0 17.3 o 698
2007-09-14 20:51:30 C 22 00 33.27 +18 17 00.4 r 084
2007-09-14 20:56:44 C 22 00 32.77 +18 16 58.2 r 084
2007-09-14 21:52:18 C 22 00 27.41 +18 16 35.1 r 084
2007-09-14 21:57:32 C 22 00 26.91 +18 16 32.8 r 084
2007-09-15 05:58:10 C 21 59 43.68 +18 13 23.2 c 670
2007-09-15 18:51:38 C 21 58 34.29 +18 07 36.1 o 151
2007-09-15 18:52:43 C 21 58 34.18 +18 07 36.2 o 151
2007-09-15 18:53:49 C 21 58 34.12 +18 07 36.0 o 151
2007-09-15 19:38:17 C 21 58 29.73 +18 07 15.1 r 113
2007-09-15 19:40:28 C 21 58 29.48 +18 07 14.0 r 113
2007-09-15 19:42:40 C 21 58 29.26 +18 07 13.0 r 113
2007-09-15 19:44:50 C 21 58 29.10 +18 07 12.3 r 113
2007-09-15 19:47:02 C 21 58 28.88 +18 07 11.2 r 113
2007-09-16 19:27:41 C 21 56 21.49 +17 56 12.7 17.9 r B15
2007-09-16 19:37:36 C 21 56 20.55 +17 56 08.1 17.9 r B15
2007-09-16 19:48:38 C 21 56 19.51 +17 56 02.9 17.9 r B15
2007-09-16 20:00:48 C 21 56 18.35 +17 55 57.2 17.9 r B15
2007-09-16 20:12:24 C 21 56 17.25 +17 55 51.7 17.9 r B15
2007-09-16 20:25:03 C 21 56 16.46 +17 55 44.8 o J65
2007-09-16 20:26:45 C 21 56 16.30 +17 55 43.8 o J65
2007-09-16 21:23:07 C 21 56 11.00 +17 55 17.4 o J65
2007-09-17 07:09:34 C 21 55 17.36 +17 50 39.0 r H45
2007-09-17 07:11:18 C 21 55 17.19 +17 50 38.1 r H45
2007-09-17 07:12:56 C 21 55 17.03 +17 50 37.3 r H45
2007-09-17 07:14:48 C 21 55 16.85 +17 50 36.1 r H45
2007-09-17 07:16:28 C 21 55 16.70 +17 50 35.3 r H45
2007-09-17 11:38:29 C 21 54 55.57 +17 48 27.7 m 355
2007-09-17 11:43:31 C 21 54 55.11 +17 48 24.9 m 355
2007-09-17 11:50:15 C 21 54 54.48 +17 48 21.2 m 355
2007-09-19 05:26:32 C 21 51 18.20 +17 26 28.2 18.0 c 704
2007-09-19 05:30:51 C 21 51 18.07 +17 26 26.7 r 703
2007-09-19 05:40:15 C 21 51 17.20 +17 26 21.8 r 703
2007-09-19 05:43:31 C 21 51 16.66 +17 26 18.7 18.5 c 704
2007-09-19 05:49:36 C 21 51 16.34 +17 26 16.4 r 703
2007-09-19 05:58:57 C 21 51 15.40 +17 26 11.0 r 703
2007-09-19 06:00:36 C 21 51 15.08 +17 26 09.8 18.4 c 704
2007-09-19 06:29:01 C 21 51 12.19 +17 25 51.7 r H45
2007-09-19 06:31:07 C 21 51 11.97 +17 25 51.4 r H45
2007-09-19 06:32:30 C 21 51 11.85 +17 25 50.4 r H45
2007-09-19 06:35:10 C 21 51 11.90 +17 25 50.2 18.6 c 704
2007-09-19 06:35:21 C 21 51 11.58 +17 25 48.2 r H45
2007-09-19 06:37:53 C 21 51 11.35 +17 25 46.6 r H45
2007-09-19 21:42:35 C 21 49 56.01 +17 17 06.7 r 084
2007-09-19 22:21:01 C 21 49 52.91 +17 16 53.4 c B09
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)