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
2021-03-16 10:04:06 S 10 38 57.749 -47 26 04.27 V C57
2021-03-16 10:04:06 s 1 -170667.14 3 +279540.43 2980.0 C57
2021-03-16 10:10:48 C 10 35 41.81 -46 52 04.5 V T05
2021-03-16 10:13:05 C 10 35 41.86 -46 51 59.7 V T05
2021-03-16 10:14:06 S 10 38 57.626 -47 25 41.34 V C57
2021-03-16 10:14:06 s 1 -170894.74 0 +279085.69 7060.0 C57
2021-03-16 10:18:23 C 10 35 41.97 -46 51 48.7 V T05
2021-03-16 10:21:41 C 10 35 42.08 -46 51 41.6 V T05
2021-03-16 10:23:00 C 10 35 42.10 -46 51 38.8 V T05
2021-03-16 10:24:06 S 10 38 57.950 -47 25 20.82 V C57
2021-03-16 10:24:06 s 1 -171121.65 6 +278629.81 9880.0 C57
2021-03-16 10:34:06 S 10 38 57.792 -47 25 00.05 V C57
2021-03-16 10:34:06 s 1 -171347.88 7 +278172.79 1410.0 C57
2021-03-16 10:38:11 C 10 35 42.48 -46 51 06.9 V T05
2021-03-16 10:44:06 S 10 38 57.696 -47 24 41.80 V C57
2021-03-16 10:44:06 s 1 -171573.43 2 +277714.63 1670.0 C57
2021-03-16 10:44:15 C 10 35 42.64 -46 50 54.0 V T05
2021-03-16 10:54:06 S 10 38 57.624 -47 24 20.38 V C57
2021-03-16 10:54:06 s 1 -171798.28 8 +277255.33 640.0 C57
2021-03-16 11:04:06 S 10 38 57.547 -47 24 02.34 V C57
2021-03-16 11:04:06 s 1 -172022.45 3 +276794.89 8310.0 C57
2021-03-16 11:14:06 S 10 38 57.422 -47 23 41.17 V C57
2021-03-16 11:14:06 s 1 -172245.92 2 +276333.31 4690.0 C57
2021-03-16 11:24:06 S 10 38 57.439 -47 23 20.98 V C57
2021-03-16 11:24:06 s 1 -172468.69 5 +275870.59 9770.0 C57
2021-03-16 11:34:06 S 10 38 57.554 -47 22 58.37 V C57
2021-03-16 11:34:06 s 1 -172690.76 8 +275406.72 3540.0 C57
2021-03-16 11:44:06 S 10 38 57.511 -47 22 39.68 V C57
2021-03-16 11:44:06 s 1 -172912.13 9 +274941.72 6000.0 C57
2021-03-16 11:54:06 S 10 38 57.406 -47 22 20.42 V C57
2021-03-16 11:54:06 s 1 -173132.80 4 +274475.56 7150.0 C57
2021-03-16 12:04:06 S 10 38 57.528 -47 22 00.73 V C57
2021-03-16 12:04:06 s 1 -173352.76 2 +274008.26 6970.0 C57
2021-03-16 12:14:06 S 10 38 57.370 -47 21 40.21 V C57
2021-03-16 12:14:06 s 1 -173572.00 9 +273539.81 5460.0 C57
2021-03-16 12:24:06 S 10 38 57.264 -47 21 18.22 V C57
2021-03-16 12:24:06 s 1 -173790.54 3 +273070.22 2620.0 C57
2021-03-16 12:34:06 S 10 38 57.346 -47 20 57.73 V C57
2021-03-16 12:34:06 s 1 -174008.36 1 +272599.48 8450.0 C57
2021-03-16 12:54:06 S 10 38 57.031 -47 20 20.00 V C57
2021-03-16 12:54:06 s 1 -174441.83 7 +271654.54 6060.0 C57
2021-03-16 13:04:06 S 10 38 57.504 -47 19 58.94 V C57
2021-03-16 13:04:06 s 1 -174657.49 1 +271180.34 7840.0 C57
2021-03-16 13:44:06 S 10 38 57.005 -47 18 40.18 V C57
2021-03-16 13:44:06 s 1 -175512.80 4 +269272.03 1300.0 C57
2021-03-16 13:54:06 S 10 38 57.250 -47 18 13.90 V C57
2021-03-16 13:54:06 s 1 -175724.79 4 +268792.07 6230.0 C57
2021-03-16 14:04:06 S 10 38 57.228 -47 17 51.97 V C57
2021-03-16 14:04:06 s 1 -175936.04 2 +268310.95 9770.0 C57
2021-03-16 14:14:06 S 10 38 56.981 -47 17 37.14 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)