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
2021-01-24 04:44:07 S 05 29 35.628 -78 30 55.55 V C57
2021-01-24 04:44:07 s 1 -193813.56 2 +233117.40 7940.0 C57
2021-01-24 04:54:07 S 05 29 45.096 -78 30 48.42 V C57
2021-01-24 04:54:07 s 1 -193923.18 4 +232546.06 840.0 C57
2021-01-24 05:04:07 S 05 29 53.930 -78 30 37.48 V C57
2021-01-24 05:04:07 s 1 -194031.81 8 +231973.54 2020.0 C57
2021-01-24 05:14:07 S 05 30 03.830 -78 30 32.54 V C57
2021-01-24 05:14:07 s 1 -194139.46 3 +231399.85 1470.0 C57
2021-01-24 05:24:07 S 05 30 13.298 -78 30 23.87 V C57
2021-01-24 05:24:07 s 1 -194246.11 2 +230824.97 9190.0 C57
2021-01-24 05:34:07 S 05 30 23.914 -78 30 13.97 V C57
2021-01-24 05:34:07 s 1 -194351.76 2 +230248.91 5170.0 C57
2021-01-24 05:44:07 S 05 30 32.098 -78 30 06.84 V C57
2021-01-24 05:44:07 s 1 -194456.41 0 +229671.67 9390.0 C57
2021-01-24 05:54:07 S 05 30 42.768 -78 29 58.56 V C57
2021-01-24 05:54:07 s 1 -194560.04 9 +229093.24 1860.0 C57
2021-01-24 06:14:07 S 05 31 01.726 -78 29 42.36 V C57
2021-01-24 06:14:07 s 1 -194764.29 0 +227932.83 1500.0 C57
2021-01-24 06:24:07 S 05 31 10.438 -78 29 32.64 V C57
2021-01-24 06:24:07 s 1 -194864.88 2 +227350.85 8650.0 C57
2021-01-24 06:34:07 S 05 31 20.618 -78 29 24.94 V C57
2021-01-24 06:34:07 s 1 -194964.44 9 +226767.67 4020.0 C57
2021-01-24 06:44:07 S 05 31 29.791 -78 29 17.70 V C57
2021-01-24 06:44:07 s 1 -195062.98 8 +226183.30 7590.0 C57
2021-01-24 06:54:07 S 05 31 39.341 -78 29 08.20 V C57
2021-01-24 06:54:07 s 1 -195160.49 4 +225597.75 9350.0 C57
2021-01-24 07:04:07 S 05 31 49.255 -78 29 01.25 V C57
2021-01-24 07:04:07 s 1 -195256.96 1 +225010.99 9310.0 C57
2021-01-24 07:14:07 S 05 31 57.730 -78 28 50.84 V C57
2021-01-24 07:14:07 s 1 -195352.38 7 +224423.05 7440.0 C57
2021-01-24 07:24:07 S 05 32 08.177 -78 28 43.57 V C57
2021-01-24 07:24:07 s 1 -195446.76 7 +223833.90 3750.0 C57
2021-01-24 07:34:07 S 05 32 17.837 -78 28 34.18 V C57
2021-01-24 07:34:07 s 1 -195540.09 5 +223243.56 8220.0 C57
2021-01-24 07:44:07 S 05 32 27.274 -78 28 25.00 V C57
2021-01-24 07:44:07 s 1 -195632.36 8 +222652.02 850.0 C57
2021-01-24 07:54:07 S 05 32 36.293 -78 28 17.94 V C57
2021-01-24 07:54:07 s 1 -195723.58 1 +222059.28 1630.0 C57
2021-01-24 08:04:07 S 05 32 46.241 -78 28 09.30 V C57
2021-01-24 08:04:07 s 1 -195813.72 9 +221465.34 550.0 C57
2021-01-24 08:14:07 S 05 32 56.218 -78 28 01.92 V C57
2021-01-24 08:14:07 s 1 -195902.80 8 +220870.20 7600.0 C57
2021-01-24 08:34:07 S 05 33 15.773 -78 27 39.85 V C57
2021-01-24 08:34:07 s 1 -196077.74 1 +219676.29 6070.0 C57
2021-01-24 09:14:07 S 05 33 51.979 -78 27 07.81 V C57
2021-01-24 09:14:07 s 1 -196414.57 1 +217273.99 220.0 C57
2021-01-24 09:24:07 S 05 34 00.605 -78 26 57.34 V C57
2021-01-24 09:24:07 s 1 -196496.03 6 +216670.38 3960.0 C57
2021-01-24 09:34:07 S 05 34 12.038 -78 26 48.48 V C57
2021-01-24 09:34:07 s 1 -196576.39 3 +216065.57 5770.0 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)