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
2021-03-29 13:04:06 S 10 53 43.906 -36 20 19.90 V C57
2021-03-29 13:04:06 s 1 -166752.08 2 +271775.32 4290.0 C57
2021-03-29 13:14:05 S 10 53 44.071 -36 20 02.04 V C57
2021-03-29 13:14:05 s 1 -166977.93 4 +271295.65 2470.0 C57
2021-03-29 13:24:06 S 10 53 44.138 -36 19 40.40 V C57
2021-03-29 13:24:06 s 1 -167203.04 9 +270814.78 9270.0 C57
2021-03-29 13:34:05 S 10 53 44.405 -36 19 19.42 V C57
2021-03-29 13:34:05 s 1 -167427.42 5 +270332.72 4670.0 C57
2021-03-29 13:44:06 S 10 53 44.376 -36 18 59.94 V C57
2021-03-29 13:44:06 s 1 -167651.05 8 +269849.46 8670.0 C57
2021-03-29 13:54:05 S 10 53 44.467 -36 18 43.52 V C57
2021-03-29 13:54:05 s 1 -167873.94 6 +269365.00 1260.0 C57
2021-03-29 14:04:05 S 10 53 44.880 -36 18 23.26 V C57
2021-03-29 14:04:05 s 1 -168096.08 6 +268879.34 2440.0 C57
2021-03-29 14:14:06 S 10 53 44.590 -36 18 00.32 V C57
2021-03-29 14:14:06 s 1 -168317.47 5 +268392.48 2210.0 C57
2021-03-29 14:24:05 S 10 53 44.887 -36 17 41.06 V C57
2021-03-29 14:24:05 s 1 -168538.10 9 +267904.41 540.0 C57
2021-03-29 14:34:06 S 10 53 44.899 -36 17 20.18 V C57
2021-03-29 14:34:06 s 1 -168757.98 6 +267415.15 7450.0 C57
2021-03-29 14:44:05 S 10 53 45.005 -36 17 00.06 V C57
2021-03-29 14:44:05 s 1 -168977.10 3 +266924.68 2920.0 C57
2021-03-29 14:54:06 S 10 53 45.110 -36 16 38.96 V C57
2021-03-29 14:54:06 s 1 -169195.45 7 +266433.01 6960.0 C57
2021-03-29 15:04:05 S 10 53 45.137 -36 16 18.08 V C57
2021-03-29 15:04:05 s 1 -169413.04 4 +265940.13 9540.0 C57
2021-03-29 15:14:05 S 10 53 45.173 -36 15 58.64 V C57
2021-03-29 15:14:05 s 1 -169629.86 1 +265446.04 670.0 C57
2021-03-29 15:24:05 S 10 53 45.571 -36 15 37.76 V C57
2021-03-29 15:24:05 s 1 -169845.90 6 +264950.74 340.0 C57
2021-03-29 15:44:06 S 10 53 45.600 -36 14 58.02 V C57
2021-03-29 15:44:06 s 1 -170275.66 5 +263956.52 5270.0 C57
2021-03-29 15:54:05 S 10 53 45.994 -36 14 40.52 V C57
2021-03-29 15:54:05 s 1 -170489.37 4 +263457.60 530.0 C57
2021-03-29 16:04:06 S 10 53 45.931 -36 14 18.35 V C57
2021-03-29 16:04:06 s 1 -170702.29 7 +262957.46 4300.0 C57
2021-03-29 16:14:05 S 10 53 45.982 -36 13 58.08 V C57
2021-03-29 16:14:05 s 1 -170914.43 1 +262456.10 6580.0 C57
2021-03-29 16:24:06 S 10 53 46.207 -36 13 38.89 V C57
2021-03-29 16:24:06 s 1 -171125.77 4 +261953.53 7360.0 C57
2021-03-29 16:34:05 S 10 53 46.222 -36 13 18.48 V C57
2021-03-29 16:34:05 s 1 -171336.32 3 +261449.75 6640.0 C57
2021-03-29 16:44:05 S 10 53 46.445 -36 12 58.93 V C57
2021-03-29 16:44:05 s 1 -171546.07 3 +260944.75 4410.0 C57
2021-03-29 16:54:05 S 10 53 46.502 -36 12 37.84 V C57
2021-03-29 16:54:05 s 1 -171755.02 2 +260438.53 670.0 C57
2021-03-29 17:04:05 S 10 53 46.730 -36 12 19.44 V C57
2021-03-29 17:04:05 s 1 -171963.16 6 +259931.09 5410.0 C57
2021-03-29 17:14:06 S 10 53 46.800 -36 11 57.70 V C57
2021-03-29 17:14:06 s 1 -172170.50 3 +259422.43 8620.0 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)