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
2021-03-08 23:14:05 s 1 +157827.35 3 +144278.12 4420.0 C57
2021-03-08 23:24:05 S 10 30 17.762 -52 30 03.06 V C57
2021-03-08 23:24:05 s 1 +157790.34 1 +145118.36 6260.0 C57
2021-03-08 23:34:05 S 10 30 19.044 -52 29 44.05 V C57
2021-03-08 23:34:05 s 1 +157751.10 4 +145956.56 3550.0 C57
2021-03-08 23:44:05 S 10 30 20.594 -52 29 26.92 V C57
2021-03-08 23:44:05 s 1 +157709.65 8 +146792.71 6340.0 C57
2021-03-08 23:54:05 S 10 30 22.018 -52 29 13.88 V C57
2021-03-08 23:54:05 s 1 +157666.02 0 +147626.82 4650.0 C57
2021-03-09 00:04:05 S 10 30 23.155 -52 28 56.24 V C57
2021-03-09 00:04:05 s 1 +157620.20 8 +148458.89 8520.0 C57
2021-03-09 00:24:05 S 10 30 25.982 -52 28 24.24 V C57
2021-03-09 00:24:05 s 1 +157522.12 3 +150116.95 3060.0 C57
2021-03-09 00:34:05 S 10 30 27.355 -52 28 04.91 V C57
2021-03-09 00:34:05 s 1 +157469.88 2 +150942.93 3790.0 C57
2021-03-09 00:44:05 S 10 30 28.678 -52 27 53.21 V C57
2021-03-09 00:44:05 s 1 +157415.53 1 +151766.90 210.0 C57
2021-03-09 01:04:05 S 10 30 31.730 -52 27 18.14 V C57
2021-03-09 01:04:05 s 1 +157300.56 0 +153408.77 220.0 C57
2021-03-09 01:14:05 S 10 30 32.995 -52 27 03.49 V C57
2021-03-09 01:14:05 s 1 +157239.97 1 +154226.69 3870.0 C57
2021-03-09 01:24:05 S 10 30 34.174 -52 26 46.46 V C57
2021-03-09 01:24:05 s 1 +157177.33 3 +155042.60 3330.0 C57
2021-03-09 01:34:05 S 10 30 35.434 -52 26 31.85 V C57
2021-03-09 01:34:05 s 1 +157112.66 2 +155856.51 8630.0 C57
2021-03-09 01:44:05 S 10 30 37.171 -52 26 12.98 V C57
2021-03-09 01:44:05 s 1 +157045.97 2 +156668.41 9790.0 C57
2021-03-09 01:54:05 S 10 30 38.038 -52 25 58.84 V C57
2021-03-09 01:54:05 s 1 +156977.27 8 +157478.32 6840.0 C57
2021-03-09 02:04:05 S 10 30 39.646 -52 25 44.90 V C57
2021-03-09 02:04:05 s 1 +156906.59 5 +158286.23 9820.0 C57
2021-03-09 02:14:05 S 10 30 40.877 -52 25 28.34 V C57
2021-03-09 02:14:05 s 1 +156833.93 8 +159092.15 8750.0 C57
2021-03-09 02:24:05 S 10 30 42.468 -52 25 10.85 V C57
2021-03-09 02:24:05 s 1 +156759.32 0 +159896.08 3660.0 C57
2021-03-09 02:34:05 S 10 30 43.742 -52 24 53.21 V C57
2021-03-09 02:34:05 s 1 +156682.75 7 +160698.03 4570.0 C57
2021-03-09 02:44:05 S 10 30 45.115 -52 24 40.43 V C57
2021-03-09 02:44:05 s 1 +156604.26 1 +161497.99 1530.0 C57
2021-03-09 02:54:05 S 10 30 45.917 -52 24 23.15 V C57
2021-03-09 02:54:05 s 1 +156523.84 8 +162295.98 4540.0 C57
2021-03-09 03:14:05 S 10 30 49.380 -52 23 56.51 V C57
2021-03-09 03:14:05 s 1 +156357.32 3 +163886.05 8870.0 C57
2021-03-09 03:34:05 S 10 30 51.420 -52 23 18.49 V C57
2021-03-09 03:34:05 s 1 +156183.29 1 +165468.25 7780.0 C57
2021-03-09 03:44:05 S 10 30 52.646 -52 23 04.16 V C57
2021-03-09 03:44:05 s 1 +156093.49 3 +166256.41 1520.0 C57
2021-03-09 03:54:05 S 10 30 54.050 -52 22 48.90 V C57
2021-03-09 03:54:05 s 1 +156001.85 9 +167042.62 1480.0 C57
2021-03-09 04:04:05 S 10 30 55.334 -52 22 32.70 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)