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
2021-03-13 01:34:06 s 1 -14142.702 0 +376558.35 6350.0 C57
2021-03-13 01:44:06 S 10 37 45.871 -49 53 22.49 V C57
2021-03-13 01:44:06 s 1 -14513.588 0 +376600.89 1460.0 C57
2021-03-13 01:54:06 S 10 37 46.438 -49 53 08.48 V C57
2021-03-13 01:54:06 s 1 -14884.446 0 +376642.41 6560.0 C57
2021-03-13 02:04:06 S 10 37 46.680 -49 52 51.02 V C57
2021-03-13 02:04:06 s 1 -15255.274 0 +376682.92 1640.0 C57
2021-03-13 02:14:06 S 10 37 47.117 -49 52 35.40 V C57
2021-03-13 02:14:06 s 1 -15626.071 0 +376722.41 3290.0 C57
2021-03-13 02:24:06 S 10 37 47.508 -49 52 16.18 V C57
2021-03-13 02:24:06 s 1 -15996.836 0 +376760.88 8240.0 C57
2021-03-13 02:34:06 S 10 37 47.352 -49 51 59.47 V C57
2021-03-13 02:34:06 s 1 -16367.569 0 +376798.34 3200.0 C57
2021-03-13 02:54:06 S 10 37 48.737 -49 51 27.29 V C57
2021-03-13 02:54:06 s 1 -17108.932 0 +376870.22 3150.0 C57
2021-03-13 03:04:06 S 10 37 48.876 -49 51 08.68 V C57
2021-03-13 03:04:06 s 1 -17479.561 0 +376904.63 8130.0 C57
2021-03-13 03:14:06 S 10 37 49.250 -49 50 51.43 V C57
2021-03-13 03:14:06 s 1 -17850.154 0 +376938.03 3110.0 C57
2021-03-13 03:34:06 S 10 37 49.642 -49 50 15.54 V C57
2021-03-13 03:34:06 s 1 -18591.225 0 +377001.79 3080.0 C57
2021-03-13 03:44:06 S 10 37 50.352 -49 50 00.67 V C57
2021-03-13 03:44:06 s 1 -18961.702 0 +377032.15 8070.0 C57
2021-03-13 03:54:06 S 10 37 50.674 -49 49 44.44 V C57
2021-03-13 03:54:06 s 1 -19332.138 0 +377061.50 3040.0 C57
2021-03-13 04:04:06 S 10 37 50.513 -49 49 29.46 V C57
2021-03-13 04:04:06 s 1 -19702.534 0 +377089.84 8010.0 C57
2021-03-13 04:14:06 S 10 37 51.516 -49 49 07.79 V C57
2021-03-13 04:14:06 s 1 -20072.887 0 +377117.16 2980.0 C57
2021-03-13 04:24:06 S 10 37 51.679 -49 48 53.50 V C57
2021-03-13 04:24:06 s 1 -20443.196 0 +377143.47 7930.0 C57
2021-03-13 04:34:06 S 10 37 52.253 -49 48 35.24 V C57
2021-03-13 04:34:06 s 1 -20813.462 0 +377168.77 2870.0 C57
2021-03-13 04:44:06 S 10 37 52.370 -49 48 22.57 V C57
2021-03-13 04:44:06 s 1 -21183.682 0 +377193.06 7790.0 C57
2021-03-13 04:54:06 S 10 37 52.829 -49 48 05.98 V C57
2021-03-13 04:54:06 s 1 -21553.856 0 +377216.34 2700.0 C57
2021-03-13 05:04:06 S 10 37 53.086 -49 47 44.48 V C57
2021-03-13 05:04:06 s 1 -21923.983 0 +377238.60 7590.0 C57
2021-03-13 05:14:06 S 10 37 53.179 -49 47 26.09 V C57
2021-03-13 05:14:06 s 1 -22294.062 0 +377259.86 2450.0 C57
2021-03-13 05:24:06 S 10 37 53.779 -49 47 10.07 V C57
2021-03-13 05:24:06 s 1 -22664.092 0 +377280.10 7300.0 C57
2021-03-13 05:34:06 S 10 37 54.269 -49 46 53.18 V C57
2021-03-13 05:34:06 s 1 -23034.072 0 +377299.34 2120.0 C57
2021-03-13 05:44:06 S 10 37 54.564 -49 46 34.86 V C57
2021-03-13 05:44:06 s 1 -23404.001 0 +377317.56 6910.0 C57
2021-03-13 05:54:06 S 10 37 54.701 -49 46 19.81 V C57
2021-03-13 05:54:06 s 1 -23773.878 0 +377334.78 1680.0 C57
2021-03-13 06:04:06 S 10 37 54.910 -49 46 05.20 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)