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
2020-08-26 07:44:54 C 00 18 09.69 +26 34 47.8 V G96
2020-08-26 07:53:06 C 00 18 09.65 +26 34 55.1 V G96
2020-08-26 08:01:18 C 00 18 09.58 +26 35 02.4 V G96
2020-08-26 08:09:29 C 00 18 09.53 +26 35 09.6 V G96
2020-08-26 11:05:33 C 00 18 09.47 +26 37 48.4 V T05
2020-08-26 11:08:53 C 00 18 09.44 +26 37 51.0 V T05
2020-08-26 11:12:50 C 00 18 09.44 +26 37 55.1 V T05
2020-08-26 11:21:34 C 00 18 09.30 +26 38 02.9 V T05
2020-08-26 23:58:09 C 00 18 08.02 +26 48 50.6 V 160
2020-08-27 00:00:46 C 00 18 08.00 +26 48 52.8 V 160
2020-08-27 00:03:52 C 00 18 07.99 +26 48 55.8 V 160
2020-08-27 06:37:57 C 00 18 07.69 +26 54 39.1 V 703
2020-08-27 06:45:31 C 00 18 07.58 +26 54 47.1 V 703
2020-08-27 06:53:07 C 00 18 07.53 +26 54 54.2 V 703
2020-08-27 07:00:41 C 00 18 07.48 +26 55 01.2 V 703
2020-08-28 07:26:32 C 00 18 01.57 +27 16 08.0 U I41
2020-08-28 07:52:22 C 00 18 01.27 +27 16 31.1 U I41
2020-08-28 09:01:42 C 00 18 00.41 +27 17 31.5 U I41
2020-08-28 09:03:03 C 00 18 00.41 +27 17 32.7 U I41
2020-08-28 09:57:08 C 00 17 59.73 +27 18 19.3 U I41
2020-08-28 10:28:04 C 00 17 59.33 +27 18 45.8 U I41
2020-08-28 10:59:58 C 00 17 58.93 +27 19 12.8 U I41
2020-08-28 14:33:32 C 00 17 59.10 +27 22 14.4 q Q21
2020-08-28 14:41:28 C 00 17 59.03 +27 22 21.5 q Q21
2020-08-28 14:57:19 C 00 17 58.83 +27 22 35.7 q Q21
2020-08-30 14:05:04 C 00 17 34.338 +28 02 52.05 U F51
2020-08-30 14:22:40 C 00 17 34.028 +28 03 06.45 U F51
2020-08-30 14:40:24 C 00 17 33.717 +28 03 20.90 U F51
2020-09-01 08:40:34 C 00 17 04.80 +28 38 31.4 V T08
2020-09-01 08:45:13 C 00 17 04.76 +28 38 35.5 V T08
2020-09-01 09:16:03 C 00 17 04.11 +28 39 03.3 V T08
2020-09-01 09:54:37 C 00 17 03.27 +28 39 35.7 V T08
2020-09-03 10:08:46 C 00 16 13.01 +29 19 10.6 V T05
2020-09-03 10:25:06 C 00 16 12.51 +29 19 24.0 V T05
2020-09-03 10:28:25 C 00 16 12.48 +29 19 27.6 V T05
2020-09-03 10:32:23 C 00 16 12.33 +29 19 30.1 V T05
2020-09-03 16:18:26 C 00 16 05.19 +29 24 04.2 q D29
2020-09-03 16:30:33 C 00 16 04.85 +29 24 14.1 q D29
2020-09-03 16:42:41 C 00 16 04.49 +29 24 24.0 q D29
2020-09-03 23:04:15 C 00 15 56.92 +29 29 24.5 V C95
2020-09-03 23:09:43 C 00 15 56.74 +29 29 29.3 V C95
2020-09-03 23:15:12 C 00 15 56.57 +29 29 33.5 V C95
2020-09-03 23:59:01 C 00 15 55.24 +29 30 08.6 V 160
2020-09-04 00:02:26 C 00 15 55.16 +29 30 12.4 V 160
2020-09-04 00:05:55 C 00 15 55.08 +29 30 16.3 V 160
2020-09-04 23:15:21 C 00 15 23.87 +29 48 44.6 V 160
2020-09-04 23:18:48 C 00 15 23.76 +29 48 47.5 V 160
2020-09-04 23:22:16 C 00 15 23.66 +29 48 50.0 V 160
2020-09-05 02:40:54 C 00 15 17.59 +29 51 26.7 V C95
2020-09-05 02:51:54 C 00 15 17.28 +29 51 35.0 V C95
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)