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
2021-03-27 14:24:06 S 10 52 49.618 -37 51 00.00 V C57
2021-03-27 14:24:06 s 1 -82758.127 0 +362062.65 5320.0 C57
2021-03-27 14:34:06 S 10 52 49.615 -37 50 41.24 V C57
2021-03-27 14:34:06 s 1 -83109.247 0 +361888.52 6310.0 C57
2021-03-27 14:44:06 S 10 52 50.095 -37 50 22.81 V C57
2021-03-27 14:44:06 s 1 -83460.129 0 +361713.37 6880.0 C57
2021-03-27 14:54:06 S 10 52 50.342 -37 50 03.84 V C57
2021-03-27 14:54:06 s 1 -83810.771 0 +361537.20 7020.0 C57
2021-03-27 15:04:06 S 10 52 50.570 -37 49 44.98 V C57
2021-03-27 15:04:06 s 1 -84161.172 0 +361359.99 6730.0 C57
2021-03-27 15:14:06 S 10 52 50.722 -37 49 25.86 V C57
2021-03-27 15:14:06 s 1 -84511.332 0 +361181.76 6000.0 C57
2021-03-27 15:24:06 S 10 52 51.158 -37 49 05.70 V C57
2021-03-27 15:24:06 s 1 -84861.248 0 +361002.50 4830.0 C57
2021-03-27 15:34:06 S 10 52 51.528 -37 48 48.24 V C57
2021-03-27 15:34:06 s 1 -85210.921 0 +360822.22 3220.0 C57
2021-03-27 15:44:06 S 10 52 51.576 -37 48 29.30 V C57
2021-03-27 15:44:06 s 1 -85560.348 0 +360640.91 1180.0 C57
2021-03-27 15:54:06 S 10 52 51.770 -37 48 09.25 V C57
2021-03-27 15:54:06 s 1 -85909.529 0 +360458.56 8690.0 C57
2021-03-27 16:04:06 S 10 52 52.279 -37 47 51.97 V C57
2021-03-27 16:04:06 s 1 -86258.462 0 +360275.20 5750.0 C57
2021-03-27 16:14:06 S 10 52 52.330 -37 47 31.63 V C57
2021-03-27 16:14:06 s 1 -86607.146 0 +360090.80 2370.0 C57
2021-03-27 16:24:06 S 10 52 52.613 -37 47 11.18 V C57
2021-03-27 16:24:06 s 1 -86955.581 0 +359905.37 8530.0 C57
2021-03-27 16:34:06 S 10 52 52.913 -37 46 53.94 V C57
2021-03-27 16:34:06 s 1 -87303.764 0 +359718.92 4240.0 C57
2021-03-27 16:44:06 S 10 52 53.167 -37 46 34.57 V C57
2021-03-27 16:44:06 s 1 -87651.695 0 +359531.44 9500.0 C57
2021-03-27 16:54:06 S 10 52 53.441 -37 46 15.89 V C57
2021-03-27 16:54:06 s 1 -87999.372 0 +359342.92 4300.0 C57
2021-03-27 17:04:06 S 10 52 53.820 -37 45 57.28 V C57
2021-03-27 17:04:06 s 1 -88346.795 0 +359153.38 8640.0 C57
2021-03-27 17:14:06 S 10 52 54.012 -37 45 38.92 V C57
2021-03-27 17:14:06 s 1 -88693.961 0 +358962.81 2510.0 C57
2021-03-27 17:24:06 S 10 52 54.233 -37 45 19.51 V C57
2021-03-27 17:24:06 s 1 -89040.871 0 +358771.21 5920.0 C57
2021-03-27 17:34:06 S 10 52 54.521 -37 45 01.37 V C57
2021-03-27 17:34:06 s 1 -89387.522 0 +358578.57 8870.0 C57
2021-03-27 17:44:06 S 10 52 54.816 -37 44 42.25 V C57
2021-03-27 17:44:06 s 1 -89733.914 0 +358384.91 1350.0 C57
2021-03-27 17:54:06 S 10 52 55.130 -37 44 22.20 V C57
2021-03-27 17:54:06 s 1 -90080.045 0 +358190.22 3350.0 C57
2021-03-27 18:04:06 S 10 52 55.277 -37 44 01.28 V C57
2021-03-27 18:04:06 s 1 -90425.914 0 +357994.49 4890.0 C57
2021-03-27 18:14:06 S 10 52 55.553 -37 43 45.30 V C57
2021-03-27 18:14:06 s 1 -90771.520 0 +357797.74 5940.0 C57
2021-03-27 18:24:06 S 10 52 55.783 -37 43 24.56 V C57
2021-03-27 18:24:06 s 1 -91116.862 0 +357599.95 6520.0 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)