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
2020-12-09 09:31:31 C 23 06 59.64 -08 10 07.0 q Q21
2020-12-09 18:20:08 C 23 07 48.12 -08 42 14.9 V K85
2020-12-09 18:30:09 C 23 07 48.81 -08 42 51.3 V K85
2020-12-11 06:05:02 C 23 11 07.49 -10 54 14.8 V T05
2020-12-11 06:07:41 C 23 11 07.66 -10 54 25.1 V T05
2020-12-11 06:11:01 C 23 11 07.89 -10 54 37.2 V T05
2020-12-11 06:13:39 C 23 11 08.07 -10 54 47.3 V T05
2020-12-11 06:19:37 C 23 11 08.46 -10 55 09.5 V T05
2020-12-11 06:22:15 C 23 11 08.65 -10 55 19.5 V T05
2020-12-11 06:39:28 C 23 11 09.82 -10 56 23.9 V T05
2020-12-11 06:43:26 C 23 11 10.10 -10 56 39.1 V T05
2020-12-11 10:44:04 C 23 11 34.65 -11 12 21.3 q Q11
2020-12-11 10:51:48 C 23 11 35.21 -11 12 50.5 q Q11
2020-12-11 10:59:32 C 23 11 35.77 -11 13 19.6 q Q11
2020-12-14 05:52:28 C 23 18 29.11 -15 39 11.6 V T05
2020-12-14 05:57:06 C 23 18 29.45 -15 39 30.4 V T05
2020-12-14 06:24:51 C 23 18 31.59 -15 41 23.4 V T05
2020-12-15 08:38:04 C 23 21 30.22 -17 32 12.1 q Q21
2020-12-15 08:42:36 C 23 21 30.51 -17 32 30.3 q Q21
2020-12-15 08:47:07 C 23 21 30.84 -17 32 51.3 q Q21
2020-12-15 08:51:40 C 23 21 31.33 -17 33 08.7 q Q21
2020-12-15 08:56:12 C 23 21 31.68 -17 33 28.5 q Q21
2020-12-15 09:02:15 C 23 21 32.08 -17 33 54.3 q Q21
2020-12-16 02:29:51 C 23 23 30.90 -18 49 03.7 V 703
2020-12-16 02:37:47 C 23 23 31.57 -18 49 38.7 V 703
2020-12-16 02:45:44 C 23 23 32.28 -18 50 11.6 V 703
2020-12-16 02:53:40 C 23 23 32.97 -18 50 45.9 V 703
2020-12-17 09:50:12 C 23 27 15.68 -21 07 50.8 q Q11
2020-12-17 10:02:40 C 23 27 16.80 -21 08 46.0 q Q11
2020-12-17 10:15:09 C 23 27 17.95 -21 09 41.2 q Q11
2020-12-19 01:26:47 C 23 32 17.93 -24 09 30.8 V 703
2020-12-19 01:34:59 C 23 32 18.69 -24 10 09.8 V 703
2020-12-19 01:43:12 C 23 32 19.46 -24 10 47.6 V 703
2020-12-19 01:51:24 C 23 32 20.25 -24 11 25.8 V 703
2020-12-20 05:55:29 C 23 36 02.43 -26 23 53.4 V T08
2020-12-20 06:00:08 C 23 36 02.90 -26 24 15.4 V T08
2020-12-20 06:08:05 C 23 36 03.70 -26 24 52.3 V T08
2020-12-20 06:27:20 C 23 36 05.64 -26 26 22.0 V T08
2020-12-24 05:35:58 C 23 50 14.32 -34 18 13.5 V T08
2020-12-24 05:40:37 C 23 50 14.87 -34 18 36.2 V T08
2020-12-24 05:49:14 C 23 50 15.89 -34 19 18.9 V T08
2020-12-24 06:03:49 C 23 50 17.65 -34 20 31.3 V T08
2020-12-26 04:53:16 C 23 58 13.32 -38 21 27.8 V T05
2020-12-26 04:53:56 C 23 58 13.42 -38 21 31.3 V T05
2020-12-26 04:59:52 C 23 58 14.16 -38 22 01.4 V T05
2020-12-26 05:03:50 C 23 58 14.66 -38 22 21.7 V T05
2020-12-26 05:07:48 C 23 58 15.18 -38 22 41.5 V T05
2020-12-26 05:08:27 C 23 58 15.28 -38 22 44.7 V T05
2020-12-26 05:22:20 C 23 58 17.04 -38 23 55.0 V T05
2020-12-26 05:23:00 C 23 58 17.13 -38 23 58.4 V T05
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)