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
2020-11-15 09:41:34 C 22 36 29.69 +16 42 47.0 q Q21
2020-11-15 09:46:07 C 22 36 29.70 +16 42 38.5 q Q21
2020-11-15 09:50:38 C 22 36 29.64 +16 42 29.1 q Q21
2020-11-15 17:02:24 C 22 36 36.57 +16 28 29.9 V L04
2020-11-15 17:07:35 C 22 36 36.57 +16 28 20.0 V L04
2020-11-15 17:13:30 C 22 36 36.55 +16 28 08.6 V L04
2020-11-16 02:32:53 C 22 36 45.01 +16 10 29.8 V 703
2020-11-16 02:40:27 C 22 36 45.01 +16 10 15.0 V 703
2020-11-16 02:48:01 C 22 36 44.95 +16 10 00.3 V 703
2020-11-16 02:55:35 C 22 36 44.90 +16 09 45.8 V 703
2020-11-16 04:27:49 S 22 36 45.97 +16 06 59.3 L C51
2020-11-16 04:28:00 S 22 36 45.99 +16 06 57.9 L C51
2020-11-16 06:38:00 C 22 36 47.55 +16 02 52.3 V T08
2020-11-16 06:42:39 C 22 36 47.53 +16 02 42.8 V T08
2020-11-16 06:53:22 C 22 36 47.47 +16 02 21.9 V T08
2020-11-16 07:08:12 C 22 36 47.40 +16 01 52.3 V T08
2020-11-16 07:36:08 S 22 36 49.188 +16 00 53.89 L C51
2020-11-16 09:47:57 C 22 36 52.56 +15 56 19.6 q Q21
2020-11-16 09:52:29 C 22 36 52.48 +15 56 11.1 q Q21
2020-11-16 09:57:00 C 22 36 52.50 +15 56 02.1 q Q21
2020-11-16 10:01:32 C 22 36 52.49 +15 55 53.3 q Q21
2020-11-16 10:44:27 S 22 36 52.49 +15 54 47.4 L C51
2020-11-16 12:18:42 S 22 36 54.20 +15 51 43.1 L C51
2020-11-16 13:52:46 S 22 36 55.89 +15 48 40.1 L C51
2020-11-16 15:27:01 S 22 36 57.64 +15 45 35.2 L C51
2020-11-16 17:01:05 S 22 36 59.37 +15 42 31.7 L C51
2020-11-16 18:35:20 S 22 37 01.16 +15 39 26.4 L C51
2020-11-16 21:43:39 S 22 37 04.77 +15 33 16.4 L C51
2020-11-17 00:51:47 S 22 37 08.45 +15 27 07.1 L C51
2020-11-17 00:51:59 S 22 37 08.47 +15 27 05.5 L C51
2020-11-17 20:14:52 C 22 37 32.33 +14 48 03.5 V L63
2020-11-17 20:24:50 C 22 37 32.47 +14 47 43.5 V L63
2020-11-17 20:35:18 C 22 37 32.51 +14 47 22.3 V L63
2020-11-18 17:42:19 C 22 38 06.57 +14 04 30.8 V G33
2020-11-18 17:44:13 C 22 38 06.62 +14 04 26.9 V G33
2020-11-18 17:45:40 C 22 38 06.61 +14 04 24.2 V G33
2020-11-18 17:49:07 C 22 38 06.67 +14 04 17.9 V G33
2020-11-18 17:50:38 C 22 38 06.67 +14 04 13.4 V G33
2020-11-18 17:52:28 C 22 38 06.69 +14 04 10.2 V G33
2020-11-18 18:56:04 C 22 38 06.93 +14 02 09.9 V 160
2020-11-18 18:59:03 C 22 38 06.96 +14 02 03.7 V 160
2020-11-18 19:02:01 C 22 38 06.98 +14 01 57.4 V 160
2020-11-18 19:14:00 C 22 38 07.04 +14 01 32.6 V G17
2020-11-18 19:15:29 C 22 38 07.04 +14 01 29.9 V G17
2020-11-18 19:16:59 C 22 38 07.09 +14 01 26.5 V G17
2020-11-18 20:39:46 C 22 38 07.60 +13 58 38.2 V L74
2020-11-18 20:40:10 C 22 38 07.57 +13 58 36.4 V L74
2020-11-18 20:40:58 C 22 38 07.57 +13 58 34.9 V L74
2020-11-18 20:41:47 C 22 38 07.57 +13 58 33.3 V L74
2020-11-18 20:42:11 C 22 38 07.58 +13 58 32.5 V L74
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)