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
2021-03-23 05:04:06 S 10 47 36.034 -41 04 04.19 V C57
2021-03-23 05:04:06 s 1 +139600.60 9 +259940.65 3560.0 C57
2021-03-23 05:14:06 S 10 47 36.631 -41 03 46.98 V C57
2021-03-23 05:14:06 s 1 +139342.21 6 +260477.52 5910.0 C57
2021-03-23 05:24:06 S 10 47 37.543 -41 03 27.22 V C57
2021-03-23 05:24:06 s 1 +139083.05 5 +261012.95 6670.0 C57
2021-03-23 05:34:06 S 10 47 38.261 -41 03 10.22 V C57
2021-03-23 05:34:06 s 1 +138823.12 9 +261546.94 5860.0 C57
2021-03-23 05:44:06 S 10 47 39.166 -41 02 50.60 V C57
2021-03-23 05:44:06 s 1 +138562.44 3 +262079.49 3480.0 C57
2021-03-23 05:54:06 S 10 47 39.787 -41 02 34.15 V C57
2021-03-23 05:54:06 s 1 +138300.99 9 +262610.61 9550.0 C57
2021-03-23 06:04:06 S 10 47 40.558 -41 02 13.34 V C57
2021-03-23 06:04:06 s 1 +138038.80 4 +263140.30 4060.0 C57
2021-03-23 06:14:06 S 10 47 41.412 -41 01 56.21 V C57
2021-03-23 06:14:06 s 1 +137775.85 9 +263668.56 7030.0 C57
2021-03-23 06:24:06 S 10 47 42.163 -41 01 38.42 V C57
2021-03-23 06:24:06 s 1 +137512.17 0 +264195.38 8470.0 C57
2021-03-23 06:34:06 S 10 47 43.236 -41 01 20.21 V C57
2021-03-23 06:34:06 s 1 +137247.74 1 +264720.78 8380.0 C57
2021-03-23 06:44:06 S 10 47 43.934 -41 01 01.81 V C57
2021-03-23 06:44:06 s 1 +136982.57 4 +265244.76 6770.0 C57
2021-03-23 06:54:06 S 10 47 44.748 -41 00 44.68 V C57
2021-03-23 06:54:06 s 1 +136716.67 5 +265767.31 3650.0 C57
2021-03-23 07:04:06 S 10 47 45.346 -41 00 27.79 V C57
2021-03-23 07:04:06 s 1 +136450.04 6 +266288.44 9020.0 C57
2021-03-23 07:14:06 S 10 47 46.010 -41 00 07.60 V C57
2021-03-23 07:14:06 s 1 +136182.69 3 +266808.15 2900.0 C57
2021-03-23 07:24:06 S 10 47 46.865 -40 59 51.32 V C57
2021-03-23 07:24:06 s 1 +135914.61 8 +267326.45 5290.0 C57
2021-03-23 07:34:06 S 10 47 47.897 -40 59 32.93 V C57
2021-03-23 07:34:06 s 1 +135645.82 5 +267843.32 6200.0 C57
2021-03-23 07:44:06 S 10 47 48.718 -40 59 16.15 V C57
2021-03-23 07:44:06 s 1 +135376.31 9 +268358.79 5640.0 C57
2021-03-23 07:54:06 S 10 47 49.361 -40 58 56.03 V C57
2021-03-23 07:54:06 s 1 +135106.10 2 +268872.84 3610.0 C57
2021-03-23 08:04:06 S 10 47 50.158 -40 58 37.38 V C57
2021-03-23 08:04:06 s 1 +134835.17 9 +269385.49 120.0 C57
2021-03-23 08:14:06 S 10 47 50.834 -40 58 20.64 V C57
2021-03-23 08:14:06 s 1 +134563.55 4 +269896.72 5180.0 C57
2021-03-23 08:24:06 S 10 47 51.665 -40 58 02.14 V C57
2021-03-23 08:24:06 s 1 +134291.23 0 +270406.55 8800.0 C57
2021-03-23 08:34:06 S 10 47 52.382 -40 57 43.38 V C57
2021-03-23 08:34:06 s 1 +134018.21 0 +270914.98 980.0 C57
2021-03-23 08:44:06 S 10 47 53.191 -40 57 24.88 V C57
2021-03-23 08:44:06 s 1 +133744.49 9 +271422.01 1720.0 C57
2021-03-23 08:54:06 S 10 47 53.810 -40 57 05.54 V C57
2021-03-23 08:54:06 s 1 +133470.10 0 +271927.63 1050.0 C57
2021-03-23 09:04:06 S 10 47 54.658 -40 56 49.67 V C57
2021-03-23 09:04:06 s 1 +133195.01 6 +272431.85 8960.0 C57
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)