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
2020-10-08 00:37:34 C 23 22 40.40 +34 36 29.4 q W46
2020-10-08 01:03:58 C 23 22 37.63 +34 36 23.3 q W46
2020-10-08 01:42:02 C 23 22 33.58 +34 36 14.4 q W46
2020-10-08 08:29:23 C 23 21 53.865 +34 34 25.63 U F52
2020-10-08 08:40:02 C 23 21 52.693 +34 34 22.38 U F52
2020-10-08 08:50:43 C 23 21 51.501 +34 34 19.01 U F52
2020-10-08 09:01:22 C 23 21 50.319 +34 34 15.53 U F52
2020-10-09 06:05:54 C 23 19 51.60 +34 27 02.1 V 703
2020-10-09 06:13:35 C 23 19 50.76 +34 26 59.5 V 703
2020-10-09 06:21:15 C 23 19 49.92 +34 26 56.3 V 703
2020-10-09 06:28:56 C 23 19 49.05 +34 26 52.4 V 703
2020-10-09 06:31:37 C 23 19 48.66 +34 26 51.8 V 703
2020-10-09 06:39:10 C 23 19 47.85 +34 26 48.8 V 703
2020-10-09 06:46:43 C 23 19 47.03 +34 26 45.8 V 703
2020-10-09 06:54:15 C 23 19 46.20 +34 26 42.9 V 703
2020-10-09 08:38:02 C 23 19 37.674 +34 26 17.22 U F52
2020-10-09 08:59:39 C 23 19 35.281 +34 26 09.15 U F52
2020-10-09 09:08:38 C 23 19 34.285 +34 26 05.74 U F51
2020-10-09 09:10:26 C 23 19 34.083 +34 26 05.08 U F52
2020-10-09 09:19:13 C 23 19 33.112 +34 26 01.69 U F51
2020-10-09 09:41:07 C 23 19 30.702 +34 25 52.99 U F51
2020-10-09 11:25:03 C 23 19 19.42 +34 25 08.5 V T05
2020-10-09 11:47:07 C 23 19 17.09 +34 24 58.4 V T05
2020-10-09 11:52:26 C 23 19 16.53 +34 24 56.0 V T05
2020-10-09 12:13:20 C 23 19 14.36 +34 24 46.2 V T05
2020-10-10 08:33:00 C 23 17 23.48 +34 16 59.0 V T05
2020-10-10 08:40:57 C 23 17 22.60 +34 16 55.6 V T05
2020-10-10 08:46:54 C 23 17 21.94 +34 16 53.1 V T05
2020-10-10 09:03:30 C 23 17 20.10 +34 16 45.9 V T05
2020-10-10 10:05:53 C 23 17 13.25 +34 16 17.7 V T05
2020-10-11 10:40:44 C 23 14 55.54 +34 05 19.7 V T08
2020-10-11 10:44:49 C 23 14 55.12 +34 05 17.4 V T08
2020-10-11 11:22:07 C 23 14 51.18 +34 04 56.5 V T08
2020-10-11 11:49:02 C 23 14 48.37 +34 04 41.4 V T08
2020-10-11 12:39:04 C 23 14 47.38 +34 04 15.9 V P87
2020-10-11 12:46:59 C 23 14 46.53 +34 04 11.9 V P87
2020-10-11 12:53:03 C 23 14 45.91 +34 04 09.2 V P87
2020-10-12 04:10:33 C 23 13 22.15 +33 56 36.9 V G96
2020-10-12 04:18:01 C 23 13 21.34 +33 56 33.1 V G96
2020-10-12 04:25:29 C 23 13 20.54 +33 56 29.6 V G96
2020-10-12 04:32:57 C 23 13 19.74 +33 56 25.9 V G96
2020-10-12 04:43:37 C 23 13 18.94 +33 56 19.2 U I41
2020-10-12 04:44:57 C 23 13 18.80 +33 56 18.6 U I41
2020-10-12 05:43:09 C 23 13 12.54 +33 55 49.4 U I41
2020-10-12 05:44:41 C 23 13 12.37 +33 55 48.6 U I41
2020-10-12 14:07:28 C 23 12 24.98 +33 51 20.8 q Q21
2020-10-12 14:09:00 C 23 12 24.83 +33 51 20.0 q Q21
2020-10-12 14:10:33 C 23 12 24.67 +33 51 18.9 q Q21
2020-10-12 14:12:07 C 23 12 24.50 +33 51 18.0 q Q21
2020-10-12 14:13:38 C 23 12 24.34 +33 51 17.2 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)