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
2021-03-14 22:34:06 S 10 38 48.403 -48 34 19.74 V C57
2021-03-14 22:34:06 s 1 -110101.07 5 +351661.87 3740.0 C57
2021-03-14 22:44:06 S 10 38 48.480 -48 34 01.24 V C57
2021-03-14 22:44:06 s 1 -110428.58 9 +351434.02 1130.0 C57
2021-03-14 22:54:06 S 10 38 48.552 -48 33 39.92 V C57
2021-03-14 22:54:06 s 1 -110755.79 8 +351205.15 7990.0 C57
2021-03-14 23:04:06 S 10 38 48.420 -48 33 23.80 V C57
2021-03-14 23:04:06 s 1 -111082.70 1 +350975.27 4300.0 C57
2021-03-14 23:14:06 S 10 38 48.838 -48 33 07.56 V C57
2021-03-14 23:14:06 s 1 -111409.29 6 +350744.37 70.0 C57
2021-03-14 23:24:06 S 10 38 48.566 -48 32 47.98 V C57
2021-03-14 23:24:06 s 1 -111735.58 2 +350512.46 5290.0 C57
2021-03-14 23:34:06 S 10 38 48.811 -48 32 26.56 V C57
2021-03-14 23:34:06 s 1 -112061.55 8 +350279.54 9960.0 C57
2021-03-14 23:44:06 S 10 38 49.030 -48 32 06.79 V C57
2021-03-14 23:44:06 s 1 -112387.22 2 +350045.59 4070.0 C57
2021-03-14 23:54:06 S 10 38 49.387 -48 31 52.28 V C57
2021-03-14 23:54:06 s 1 -112712.57 3 +349810.63 7630.0 C57
2021-03-15 00:04:06 S 10 38 49.334 -48 31 30.54 V C57
2021-03-15 00:04:06 s 1 -113037.61 1 +349574.66 640.0 C57
2021-03-15 00:14:06 S 10 38 49.555 -48 31 13.66 V C57
2021-03-15 00:14:06 s 1 -113362.33 3 +349337.67 3080.0 C57
2021-03-15 00:24:06 S 10 38 49.402 -48 30 56.92 V C57
2021-03-15 00:24:06 s 1 -113686.73 9 +349099.66 4960.0 C57
2021-03-15 00:34:06 S 10 38 50.083 -48 30 38.59 V C57
2021-03-15 00:34:06 s 1 -114010.82 7 +348860.63 6270.0 C57
2021-03-15 00:44:06 S 10 38 49.742 -48 30 16.06 V C57
2021-03-15 00:44:06 s 1 -114334.59 7 +348620.59 7020.0 C57
2021-03-15 00:54:06 S 10 38 49.922 -48 29 59.93 V C57
2021-03-15 00:54:06 s 1 -114658.04 5 +348379.52 7200.0 C57
2021-03-15 01:04:06 S 10 38 49.843 -48 29 38.72 V C57
2021-03-15 01:04:06 s 1 -114981.17 3 +348137.44 6800.0 C57
2021-03-15 01:14:06 S 10 38 50.222 -48 29 24.07 V C57
2021-03-15 01:14:06 s 1 -115303.97 7 +347894.34 5830.0 C57
2021-03-15 01:24:06 S 10 38 50.177 -48 29 03.95 V C57
2021-03-15 01:24:06 s 1 -115626.45 7 +347650.22 4280.0 C57
2021-03-15 01:34:06 S 10 38 50.491 -48 28 46.02 V C57
2021-03-15 01:34:06 s 1 -115948.61 2 +347405.08 2150.0 C57
2021-03-15 01:44:06 S 10 38 50.335 -48 28 25.68 V C57
2021-03-15 01:44:06 s 1 -116270.44 0 +347158.93 9440.0 C57
2021-03-15 01:54:06 S 10 38 50.522 -48 28 09.16 V C57
2021-03-15 01:54:06 s 1 -116591.94 1 +346911.75 6150.0 C57
2021-03-15 02:04:06 S 10 38 50.486 -48 27 47.48 V C57
2021-03-15 02:04:06 s 1 -116913.11 1 +346663.55 2260.0 C57
2021-03-15 02:24:06 S 10 38 51.002 -48 27 12.13 V C57
2021-03-15 02:24:06 s 1 -117554.46 0 +346164.09 2720.0 C57
2021-03-15 02:34:06 S 10 38 50.906 -48 26 57.08 V C57
2021-03-15 02:34:06 s 1 -117874.63 5 +345912.83 7050.0 C57
2021-03-15 02:44:06 S 10 38 51.168 -48 26 37.61 V C57
2021-03-15 02:44:06 s 1 -118194.47 6 +345660.54 790.0 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)