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
2020-11-18 21:26:15 C 22 38 09.75 +13 57 23.0 V G40
2020-11-18 21:41:17 C 22 38 09.84 +13 56 51.6 V G40
2020-11-18 22:06:16 C 22 38 10.00 +13 55 59.3 V G40
2020-11-18 22:26:41 C 22 38 10.14 +13 55 16.5 V G40
2020-11-18 22:50:40 C 22 38 10.37 +13 54 26.0 V G40
2020-11-19 02:28:17 C 22 38 19.52 +13 46 57.9 V 703
2020-11-19 02:35:53 C 22 38 19.57 +13 46 42.6 V 703
2020-11-19 02:43:28 C 22 38 19.59 +13 46 26.5 V 703
2020-11-19 02:51:04 C 22 38 19.60 +13 46 11.1 V 703
2020-11-19 10:15:43 C 22 38 31.93 +13 30 45.5 q Q21
2020-11-19 10:20:16 C 22 38 31.83 +13 30 36.9 q Q21
2020-11-19 10:23:11 C 22 38 31.87 +13 30 30.6 q Q21
2020-11-19 10:24:44 C 22 38 31.91 +13 30 27.6 q Q21
2020-11-20 17:16:05 C 22 39 30.44 +12 25 15.9 V G33
2020-11-20 17:17:48 C 22 39 30.48 +12 25 12.0 V G33
2020-11-20 17:19:28 C 22 39 30.51 +12 25 08.4 V G33
2020-11-20 17:20:55 C 22 39 30.53 +12 25 05.7 V G33
2020-11-20 17:22:52 C 22 39 30.55 +12 25 01.6 V G33
2020-11-20 17:24:25 C 22 39 30.60 +12 24 58.0 V G33
2020-11-20 20:23:10 C 22 39 33.96 +12 18 49.7 V J27
2020-11-20 20:30:37 C 22 39 34.07 +12 18 33.4 V J27
2020-11-20 20:43:37 C 22 39 34.26 +12 18 05.6 V J27
2020-11-21 08:35:26 C 22 40 01.41 +11 52 42.0 q Q21
2020-11-21 08:39:58 C 22 40 01.52 +11 52 31.9 q Q21
2020-11-21 08:44:31 C 22 40 01.56 +11 52 23.0 q Q21
2020-11-21 08:49:03 C 22 40 01.59 +11 52 12.2 q Q21
2020-11-21 08:53:34 C 22 40 01.70 +11 52 02.9 q Q21
2020-11-21 08:58:06 C 22 40 01.73 +11 51 54.0 q Q21
2020-11-21 09:04:09 C 22 40 01.81 +11 51 39.7 q Q21
2020-11-21 09:10:12 C 22 40 01.91 +11 51 26.8 q Q21
2020-11-21 09:22:33 C 22 40 02.07 +11 51 00.0 q Q21
2020-11-21 09:28:47 C 22 40 02.16 +11 50 46.4 q Q21
2020-11-21 09:33:20 C 22 40 02.23 +11 50 36.6 q Q21
2020-11-21 16:51:56 C 22 40 18.51 +11 34 28.5 o K88
2020-11-21 16:52:58 C 22 40 18.52 +11 34 26.1 o K88
2020-11-21 16:54:02 C 22 40 18.54 +11 34 24.1 o K88
2020-11-22 01:58:09 C 22 40 38.91 +11 14 31.2 q U55
2020-11-22 01:59:35 C 22 40 38.00 +11 14 51.2 V 703
2020-11-22 02:06:44 C 22 40 39.04 +11 14 12.7 q U55
2020-11-22 02:07:48 C 22 40 38.11 +11 14 33.2 V 703
2020-11-22 02:14:04 C 22 40 39.14 +11 13 55.3 q U55
2020-11-22 02:16:00 C 22 40 38.23 +11 14 15.2 V 703
2020-11-22 02:24:13 C 22 40 38.34 +11 13 57.0 V 703
2020-11-22 05:39:58 C 22 40 41.89 +11 06 39.6 V 703
2020-11-22 05:48:11 C 22 40 42.09 +11 06 20.8 V 703
2020-11-22 05:56:24 C 22 40 42.31 +11 06 02.2 V 703
2020-11-22 06:03:57 C 22 40 42.52 +11 05 45.1 V 703
2020-11-22 08:32:53 C 22 40 53.73 +11 00 17.9 q Q21
2020-11-22 08:38:55 C 22 40 53.83 +11 00 05.1 q Q21
2020-11-22 09:00:26 C 22 40 54.23 +10 59 15.7 q Q21
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)