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
2020-10-12 14:15:12 C 23 12 24.21 +33 51 16.0 q Q21
2020-10-13 04:59:12 C 23 11 05.37 +33 43 18.5 V 703
2020-10-13 05:07:01 C 23 11 04.52 +33 43 14.2 V 703
2020-10-13 05:14:59 C 23 11 03.67 +33 43 09.9 V 703
2020-10-13 05:23:24 C 23 11 02.77 +33 43 04.9 V 703
2020-10-13 11:36:57 C 23 10 26.01 +33 39 31.3 V T05
2020-10-13 12:17:38 C 23 10 21.94 +33 39 03.2 V T05
2020-10-13 12:22:57 C 23 10 21.42 +33 38 59.7 V T05
2020-10-13 12:43:12 C 23 10 19.42 +33 38 45.5 V T05
2020-10-13 19:38:34 C 23 09 47.03 +33 34 29.3 V K85
2020-10-13 19:58:34 C 23 09 44.99 +33 34 17.9 V K85
2020-10-13 20:27:38 C 23 09 42.03 +33 34 01.2 V K85
2020-10-13 20:43:06 C 23 09 40.28 +33 33 57.3 V 130
2020-10-13 20:44:13 C 23 09 40.17 +33 33 56.7 V 130
2020-10-13 20:46:58 C 23 09 39.88 +33 33 54.9 V 130
2020-10-13 20:48:37 C 23 09 39.73 +33 33 54.1 V 130
2020-10-15 08:17:02 C 23 06 30.38 +33 11 44.1 V T08
2020-10-15 08:31:09 C 23 06 28.90 +33 11 34.3 V T08
2020-10-15 08:35:47 C 23 06 28.40 +33 11 31.1 V T08
2020-10-15 08:54:06 C 23 06 26.47 +33 11 18.1 V T08
2020-10-15 22:17:55 C 23 05 17.23 +33 01 43.6 V J27
2020-10-15 22:23:53 C 23 05 16.63 +33 01 39.3 V J27
2020-10-15 22:30:03 C 23 05 15.99 +33 01 34.9 V J27
2020-10-16 01:02:27 C 23 05 05.63 +32 59 42.7 V V93
2020-10-16 01:54:26 C 23 05 00.50 +32 59 08.6 V V93
2020-10-16 02:43:38 C 23 04 55.55 +32 58 35.0 V V93
2020-10-16 04:30:04 C 23 04 45.99 +32 57 27.2 V 703
2020-10-16 04:38:31 C 23 04 45.13 +32 57 21.2 V 703
2020-10-16 04:47:04 C 23 04 44.26 +32 57 15.3 V 703
2020-10-16 04:55:59 C 23 04 43.34 +32 57 08.7 V 703
2020-10-17 08:57:52 C 23 02 19.75 +32 36 21.7 V T05
2020-10-17 09:02:29 C 23 02 19.28 +32 36 17.8 V T05
2020-10-17 09:22:47 C 23 02 17.24 +32 36 01.2 V T05
2020-10-17 09:45:44 C 23 02 14.95 +32 35 41.9 V T05
2020-10-18 09:55:10 C 23 00 15.619 +32 16 17.08 U F52
2020-10-18 10:12:42 C 23 00 13.935 +32 16 01.19 U F52
2020-10-18 10:30:12 C 23 00 12.267 +32 15 45.24 U F52
2020-10-18 11:45:10 C 23 00 09.32 +32 14 35.0 q Q21
2020-10-18 11:48:14 C 23 00 09.01 +32 14 32.5 q Q21
2020-10-18 11:54:24 C 23 00 08.40 +32 14 27.3 q Q21
2020-10-18 12:00:36 C 23 00 07.81 +32 14 22.2 q Q21
2020-10-18 12:08:21 C 23 00 07.05 +32 14 15.6 q Q21
2020-10-18 12:19:54 C 23 00 05.93 +32 14 05.8 q Q21
2020-10-18 12:26:06 C 23 00 05.34 +32 14 00.6 q Q21
2020-10-18 13:51:21 C 22 59 57.22 +32 12 48.5 q Q11
2020-10-18 14:09:10 C 22 59 55.53 +32 12 32.6 q Q11
2020-10-18 14:15:26 C 22 59 54.94 +32 12 27.0 q Q11
2020-10-19 04:28:30 C 22 58 49.05 +32 00 28.7 V 703
2020-10-19 04:36:51 C 22 58 48.27 +32 00 21.6 V 703
2020-10-19 04:45:06 C 22 58 47.51 +32 00 14.3 V 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)