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
2007-10-20 03:24:40 C 21 22 50.02 +07 59 09.6 18.7 c 704
2007-10-20 03:41:20 C 21 22 50.12 +07 58 56.4 18.7 c 704
2007-10-20 03:57:56 C 21 22 50.23 +07 58 43.5 19.2 c 704
2007-10-20 04:14:42 C 21 22 50.32 +07 58 30.1 19.2 c 704
2007-10-20 04:31:20 C 21 22 50.40 +07 58 17.1 18.7 c 704
2007-10-31 18:27:29 C 21 31 25.50 +04 38 20.8 c A24
2007-10-31 18:38:19 C 21 31 25.93 +04 38 13.6 c A24
2007-10-31 18:42:23 C 21 31 26.09 +04 38 11.1 c A24
2007-10-31 18:57:19 C 21 31 26.70 +04 38 01.1 c A24
2007-10-31 19:01:24 C 21 31 26.87 +04 37 58.6 c A24
2007-10-31 19:12:14 C 21 31 27.31 +04 37 51.5 c A24
2007-10-31 19:22:57 C 21 31 27.73 +04 37 44.2 c A24
2007-10-31 19:27:00 C 21 31 27.88 +04 37 41.7 c A24
2007-10-31 19:41:46 C 21 31 28.46 +04 37 31.6 c A24
2007-10-31 19:45:49 C 21 31 28.62 +04 37 29.0 c A24
2007-10-31 19:56:32 C 21 31 29.05 +04 37 21.4 c A24
2007-11-01 18:46:22 C 21 32 35.51 +04 22 22.7 c A24
2007-11-01 18:50:36 C 21 32 35.67 +04 22 20.4 c A24
2007-11-01 19:00:20 C 21 32 36.11 +04 22 15.1 c A24
2007-11-01 19:01:49 C 21 32 36.14 +04 22 12.6 c A24
2007-11-01 19:03:14 C 21 32 36.21 +04 22 12.1 c A24
2007-11-03 03:43:06 C 21 34 16.06 +04 01 15.3 r 703
2007-11-03 03:53:34 C 21 34 16.53 +04 01 08.3 r 703
2007-11-03 04:04:02 C 21 34 17.07 +04 01 02.3 r 703
2007-11-03 04:14:29 C 21 34 17.40 +04 00 54.1 r 703
2007-11-09 02:39:00 C 21 42 52.23 +02 34 33.0 r 703
2007-11-09 02:46:48 C 21 42 52.74 +02 34 29.1 r 703
2007-11-09 02:54:34 C 21 42 53.24 +02 34 24.7 r 703
2007-11-09 03:02:20 C 21 42 53.67 +02 34 20.5 r 703
2007-11-09 03:19:33 C 21 42 54.62 +02 34 09.9 19.7 c 704
2007-11-09 03:37:09 C 21 42 55.64 +02 34 00.1 19.7 c 704
2007-11-09 03:54:47 C 21 42 56.70 +02 33 50.0 19.6 c 704
2007-11-09 04:12:25 C 21 42 57.84 +02 33 39.0 19.9 c 704
2007-11-09 04:30:00 C 21 42 58.93 +02 33 28.8 r 703
2007-11-09 04:42:10 C 21 42 59.61 +02 33 21.8 r 703
2007-11-09 05:06:38 C 21 43 01.09 +02 33 08.2 r 703
2007-11-13 02:06:48 C 21 49 42.97 +01 41 24.9 w 699
2007-11-13 02:33:05 C 21 49 44.83 +01 41 11.9 w 699
2007-11-13 02:59:22 C 21 49 46.61 +01 40 57.4 w 699
2007-11-13 03:25:40 C 21 49 48.46 +01 40 42.4 w 699
2007-11-16 02:10:52 C 21 55 25.42 +01 03 46.9 r 703
2007-11-16 02:19:31 C 21 55 26.11 +01 03 42.6 r 703
2007-11-16 02:28:06 C 21 55 26.76 +01 03 38.8 r 703
2007-11-16 02:36:44 C 21 55 27.30 +01 03 33.8 r 703
2007-12-05 01:58:34 C 22 40 50.37 -02 19 46.7 r 703
2007-12-05 02:07:48 C 22 40 51.38 -02 19 51.4 r 703
2007-12-05 02:17:03 C 22 40 52.35 -02 19 53.4 r 703
2007-12-05 02:26:18 C 22 40 53.43 -02 19 58.2 r 703
2008-01-01 02:35:26 C 00 10 11.02 -06 43 07.4 r 703
2008-01-01 02:44:47 C 00 10 12.46 -06 43 11.8 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)