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
2021-03-25 11:04:06 S 10 50 56.796 -39 26 18.28 V C57
2021-03-25 11:04:06 s 1 +31487.058 0 +367059.48 7720.0 C57
2021-03-25 11:14:06 S 10 50 57.492 -39 26 01.03 V C57
2021-03-25 11:14:06 s 1 +31112.819 0 +367202.32 3540.0 C57
2021-03-25 11:24:06 S 10 50 57.559 -39 25 42.28 V C57
2021-03-25 11:24:06 s 1 +30738.492 0 +367344.09 9130.0 C57
2021-03-25 11:54:06 S 10 50 59.074 -39 24 48.49 V C57
2021-03-25 11:54:06 s 1 +29614.997 0 +367762.99 4650.0 C57
2021-03-25 12:04:06 S 10 50 59.573 -39 24 28.22 V C57
2021-03-25 12:04:06 s 1 +29240.331 0 +367900.49 9400.0 C57
2021-03-25 12:14:06 S 10 50 59.933 -39 24 11.74 V C57
2021-03-25 12:14:06 s 1 +28865.583 0 +368036.92 3950.0 C57
2021-03-25 12:24:06 S 10 51 00.322 -39 23 50.35 V C57
2021-03-25 12:24:06 s 1 +28490.754 0 +368172.28 8300.0 C57
2021-03-25 12:34:06 S 10 51 00.746 -39 23 33.90 V C57
2021-03-25 12:34:06 s 1 +28115.845 0 +368306.58 2440.0 C57
2021-03-25 12:44:06 S 10 51 01.378 -39 23 15.40 V C57
2021-03-25 12:44:06 s 1 +27740.858 0 +368439.82 6390.0 C57
2021-03-25 12:54:06 S 10 51 01.978 -39 22 58.33 V C57
2021-03-25 12:54:06 s 1 +27365.793 0 +368571.99 140.0 C57
2021-03-25 13:04:06 S 10 51 02.266 -39 22 38.14 V C57
2021-03-25 13:04:06 s 1 +26990.652 0 +368703.09 3700.0 C57
2021-03-25 13:14:06 S 10 51 02.659 -39 22 21.29 V C57
2021-03-25 13:14:06 s 1 +26615.436 0 +368833.14 7070.0 C57
2021-03-25 13:24:06 S 10 51 03.228 -39 22 01.34 V C57
2021-03-25 13:24:06 s 1 +26240.147 0 +368962.12 250.0 C57
2021-03-25 13:34:06 S 10 51 03.648 -39 21 43.13 V C57
2021-03-25 13:34:06 s 1 +25864.784 0 +369090.03 3240.0 C57
2021-03-25 13:44:06 S 10 51 04.200 -39 21 25.85 V C57
2021-03-25 13:44:06 s 1 +25489.350 0 +369216.89 6050.0 C57
2021-03-25 14:14:06 S 10 51 05.791 -39 20 32.96 V C57
2021-03-25 14:14:06 s 1 +24362.629 0 +369591.08 3390.0 C57
2021-03-25 14:24:06 S 10 51 06.602 -39 20 15.25 V C57
2021-03-25 14:24:06 s 1 +23986.920 0 +369713.69 5490.0 C57
2021-03-26 09:55:50 C 10 47 27.19 -38 32 32.7 V T08
2021-03-26 10:00:28 C 10 47 27.33 -38 32 23.0 V T08
2021-03-26 10:11:45 C 10 47 27.71 -38 31 59.1 V T08
2021-03-26 10:28:20 C 10 47 28.19 -38 31 23.7 V T08
2021-03-26 13:34:06 S 10 52 02.381 -38 37 32.23 V C57
2021-03-26 13:34:06 s 1 -28394.476 0 +376613.47 2110.0 C57
2021-03-26 13:44:06 S 10 52 02.950 -38 37 13.62 V C57
2021-03-26 13:44:06 s 1 -28769.021 0 +376591.10 3350.0 C57
2021-03-26 13:54:06 S 10 52 03.338 -38 36 56.38 V C57
2021-03-26 13:54:06 s 1 -29143.485 0 +376567.70 4480.0 C57
2021-03-26 14:04:06 S 10 52 03.689 -38 36 38.23 V C57
2021-03-26 14:04:06 s 1 -29517.866 0 +376543.29 5480.0 C57
2021-03-26 14:14:06 S 10 52 04.018 -38 36 19.66 V C57
2021-03-26 14:14:06 s 1 -29892.166 0 +376517.85 6350.0 C57
2021-03-26 14:24:06 S 10 52 04.171 -38 35 57.77 V C57
2021-03-26 14:24:06 s 1 -30266.381 0 +376491.40 7100.0 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)