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
2021-03-30 02:24:05 S 10 53 52.010 -35 53 19.82 V C57
2021-03-30 02:24:05 s 1 -182226.25 7 +229532.28 1110.0 C57
2021-03-30 02:34:05 S 10 53 52.099 -35 52 58.66 V C57
2021-03-30 02:34:05 s 1 -182382.54 1 +228953.37 7480.0 C57
2021-03-30 02:44:05 S 10 53 52.085 -35 52 38.78 V C57
2021-03-30 02:44:05 s 1 -182537.79 8 +228373.18 1900.0 C57
2021-03-30 02:54:05 S 10 53 52.198 -35 52 18.08 V C57
2021-03-30 02:54:05 s 1 -182692.02 4 +227791.69 4360.0 C57
2021-03-30 03:04:05 S 10 53 52.234 -35 51 58.18 V C57
2021-03-30 03:04:05 s 1 -182845.21 3 +227208.91 4850.0 C57
2021-03-30 03:14:05 S 10 53 52.193 -35 51 35.75 V C57
2021-03-30 03:14:05 s 1 -182997.36 1 +226624.84 3350.0 C57
2021-03-30 03:24:05 S 10 53 52.454 -35 51 17.24 V C57
2021-03-30 03:24:05 s 1 -183148.46 4 +226039.47 9870.0 C57
2021-03-30 03:34:05 S 10 53 52.534 -35 50 55.72 V C57
2021-03-30 03:34:05 s 1 -183298.51 7 +225452.80 4390.0 C57
2021-03-30 03:44:06 S 10 53 52.538 -35 50 33.47 V C57
2021-03-30 03:44:06 s 1 -183447.51 5 +224864.84 6900.0 C57
2021-03-30 03:54:05 S 10 53 52.752 -35 50 15.47 V C57
2021-03-30 03:54:05 s 1 -183595.45 4 +224275.58 7400.0 C57
2021-03-30 04:04:05 S 10 53 52.634 -35 49 55.13 V C57
2021-03-30 04:04:05 s 1 -183742.32 9 +223685.02 5870.0 C57
2021-03-30 04:14:05 S 10 53 52.742 -35 49 34.43 V C57
2021-03-30 04:14:05 s 1 -183888.13 5 +223093.15 2310.0 C57
2021-03-30 04:24:05 S 10 53 52.745 -35 49 11.28 V C57
2021-03-30 04:24:05 s 1 -184032.86 7 +222499.98 6710.0 C57
2021-03-30 04:34:05 S 10 53 53.026 -35 48 53.24 V C57
2021-03-30 04:34:05 s 1 -184176.52 1 +221905.51 9050.0 C57
2021-03-30 04:44:05 S 10 53 53.018 -35 48 32.54 V C57
2021-03-30 04:44:05 s 1 -184319.09 2 +221309.73 9330.0 C57
2021-03-30 04:54:05 S 10 53 53.038 -35 48 12.53 V C57
2021-03-30 04:54:05 s 1 -184460.57 5 +220712.65 7530.0 C57
2021-03-30 05:04:05 S 10 53 53.148 -35 47 50.96 V C57
2021-03-30 05:04:05 s 1 -184600.96 4 +220114.26 3660.0 C57
2021-03-30 05:14:06 S 10 53 53.167 -35 47 29.98 V C57
2021-03-30 05:14:06 s 1 -184740.25 6 +219514.55 7690.0 C57
2021-03-30 05:24:05 S 10 53 53.352 -35 47 09.24 V C57
2021-03-30 05:24:05 s 1 -184878.44 5 +218913.54 9630.0 C57
2021-03-30 05:34:05 S 10 53 53.419 -35 46 49.33 V C57
2021-03-30 05:34:05 s 1 -185015.52 7 +218311.21 9450.0 C57
2021-03-30 05:44:05 S 10 53 53.482 -35 46 27.84 V C57
2021-03-30 05:44:05 s 1 -185151.49 5 +217707.57 7160.0 C57
2021-03-30 05:54:05 S 10 53 53.357 -35 46 07.61 V C57
2021-03-30 05:54:05 s 1 -185286.34 6 +217102.61 2730.0 C57
2021-03-30 06:04:05 S 10 53 53.458 -35 45 46.69 V C57
2021-03-30 06:04:05 s 1 -185420.07 4 +216496.34 6170.0 C57
2021-03-30 06:14:05 S 10 53 53.686 -35 45 27.43 V C57
2021-03-30 06:14:05 s 1 -185552.67 4 +215888.75 7460.0 C57
2021-03-30 06:24:05 S 10 53 53.587 -35 45 06.91 V C57
2021-03-30 06:24:05 s 1 -185684.14 1 +215279.84 6590.0 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)