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
2021-03-08 10:04:05 s 1 +151901.51 9 +71235.912 6010.0 C57
2021-03-08 10:34:05 S 10 28 19.800 -52 51 22.07 V C57
2021-03-08 10:34:05 s 1 +152523.54 9 +74252.060 8570.0 C57
2021-03-08 10:54:05 S 10 28 23.042 -52 50 47.80 V C57
2021-03-08 10:54:05 s 1 +152916.78 1 +76252.420 4150.0 C57
2021-03-08 11:04:05 S 10 28 24.684 -52 50 30.48 V C57
2021-03-08 11:04:05 s 1 +153107.08 0 +77249.462 4330.0 C57
2021-03-08 11:14:05 S 10 28 26.918 -52 50 11.65 V C57
2021-03-08 11:14:05 s 1 +153293.22 2 +78244.405 6210.0 C57
2021-03-08 11:44:05 S 10 28 31.728 -52 49 20.03 V C57
2021-03-08 11:44:05 s 1 +153827.08 0 +81216.596 2760.0 C57
2021-03-08 11:54:05 S 10 28 33.202 -52 49 02.64 V C57
2021-03-08 11:54:05 s 1 +153996.97 0 +82203.100 2160.0 C57
2021-03-08 12:04:05 S 10 28 34.951 -52 48 44.82 V C57
2021-03-08 12:04:05 s 1 +154162.89 0 +83187.485 3620.0 C57
2021-03-08 12:14:05 S 10 28 36.835 -52 48 27.72 V C57
2021-03-08 12:14:05 s 1 +154324.87 8 +84169.746 7210.0 C57
2021-03-08 13:14:05 S 10 28 46.430 -52 46 46.45 V C57
2021-03-08 13:14:05 s 1 +155216.19 3 +90018.572 7360.0 C57
2021-03-08 13:34:05 S 10 28 49.637 -52 46 13.98 V C57
2021-03-08 13:34:05 s 1 +155483.41 6 +91951.079 860.0 C57
2021-03-08 14:24:05 S 10 28 57.470 -52 44 43.58 V C57
2021-03-08 14:24:05 s 1 +156088.60 9 +96744.812 8470.0 C57
2021-03-08 14:54:05 S 10 29 02.530 -52 43 57.50 V C57
2021-03-08 14:54:05 s 1 +156409.87 9 +99595.273 8980.0 C57
2021-03-08 15:14:05 S 10 29 05.626 -52 43 23.38 V C57
2021-03-08 15:14:05 s 1 +156607.12 9 +101484.83 1950.0 C57
2021-03-08 15:34:05 S 10 29 08.846 -52 42 48.13 V C57
2021-03-08 15:34:05 s 1 +156791.10 9 +103365.79 8230.0 C57
2021-03-08 15:54:05 S 10 29 11.678 -52 42 13.10 V C57
2021-03-08 15:54:05 s 1 +156962.04 9 +105238.15 8250.0 C57
2021-03-08 16:04:05 S 10 29 13.080 -52 42 04.39 V C57
2021-03-08 16:04:05 s 1 +157042.69 8 +106171.10 8550.0 C57
2021-03-08 16:24:05 S 10 29 16.694 -52 41 28.79 V C57
2021-03-08 16:24:05 s 1 +157194.49 4 +108030.58 10.0 C57
2021-03-08 16:34:05 S 10 29 17.832 -52 41 12.12 V C57
2021-03-08 16:34:05 s 1 +157265.69 4 +108957.09 1270.0 C57
2021-03-08 16:54:05 S 10 29 21.002 -52 40 37.49 V C57
2021-03-08 16:54:05 s 1 +157398.83 3 +110803.69 5100.0 C57
2021-03-08 17:04:05 S 10 29 22.632 -52 40 20.57 V C57
2021-03-08 17:04:05 s 1 +157460.82 3 +111723.77 7780.0 C57
2021-03-08 17:14:05 S 10 29 24.288 -52 40 02.64 V C57
2021-03-08 17:14:05 s 1 +157519.79 4 +112641.71 4370.0 C57
2021-03-08 17:24:05 S 10 29 25.668 -52 39 47.59 V C57
2021-03-08 17:24:05 s 1 +157575.77 3 +113557.52 4910.0 C57
2021-03-08 17:34:05 S 10 29 27.259 -52 39 29.56 V C57
2021-03-08 17:34:05 s 1 +157628.78 4 +114471.18 9460.0 C57
2021-03-08 17:44:05 S 10 29 28.793 -52 39 14.80 V C57
2021-03-08 17:44:05 s 1 +157678.85 1 +115382.70 8070.0 C57
2021-03-08 17:54:05 S 10 29 30.149 -52 38 58.70 V 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)