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
2021-03-11 05:54:06 s 1 +80781.822 0 +328816.44 8390.0 C57
2021-03-11 06:34:06 S 10 35 38.590 -51 03 50.36 V C57
2021-03-11 06:34:06 s 1 +79421.643 0 +330126.38 6950.0 C57
2021-03-11 07:34:06 S 10 35 42.254 -51 02 14.86 V C57
2021-03-11 07:34:06 s 1 +77372.495 0 +332055.05 4040.0 C57
2021-03-11 08:14:06 S 10 35 44.825 -51 01 13.22 V C57
2021-03-11 08:14:06 s 1 +76000.645 0 +333316.78 5280.0 C57
2021-03-11 08:34:06 S 10 35 45.396 -51 00 41.11 V C57
2021-03-11 08:34:06 s 1 +75313.037 0 +333940.47 6940.0 C57
2021-03-11 08:44:06 S 10 35 46.337 -51 00 26.60 V C57
2021-03-11 08:44:06 s 1 +74968.819 0 +334250.52 6790.0 C57
2021-03-11 09:04:06 S 10 35 47.688 -50 59 51.72 V C57
2021-03-11 09:04:06 s 1 +74279.561 0 +334867.04 4550.0 C57
2021-03-11 09:44:06 S 10 35 50.203 -50 58 50.92 V C57
2021-03-11 09:44:06 s 1 +72897.812 0 +336085.82 2440.0 C57
2021-03-11 15:34:06 S 10 36 11.582 -50 49 32.38 V C57
2021-03-11 15:34:06 s 1 +60629.266 0 +345944.58 8460.0 C57
2021-03-11 16:24:06 S 10 36 14.342 -50 48 10.73 V C57
2021-03-11 16:24:06 s 1 +58855.561 0 +347237.68 1260.0 C57
2021-03-11 16:54:06 S 10 36 16.294 -50 47 25.98 V C57
2021-03-11 16:54:06 s 1 +57788.915 0 +347999.82 8970.0 C57
2021-03-11 17:24:06 S 10 36 17.820 -50 46 37.49 V C57
2021-03-11 17:24:06 s 1 +56720.499 0 +348751.71 2300.0 C57
2021-03-11 17:34:06 S 10 36 18.586 -50 46 20.24 V C57
2021-03-11 17:34:06 s 1 +56363.974 0 +349000.06 2450.0 C57
2021-03-11 17:54:06 S 10 36 19.426 -50 45 46.84 V C57
2021-03-11 17:54:06 s 1 +55650.353 0 +349493.36 1320.0 C57
2021-03-11 20:34:06 S 10 36 28.406 -50 41 29.08 V C57
2021-03-11 20:34:06 s 1 +49915.252 0 +353277.15 6750.0 C57
2021-03-11 20:54:06 S 10 36 29.710 -50 40 57.94 V C57
2021-03-11 20:54:06 s 1 +49195.264 0 +353729.90 9570.0 C57
2021-03-11 23:44:06 S 10 36 38.767 -50 36 26.60 V C57
2021-03-11 23:44:06 s 1 +43050.088 0 +357398.55 8360.0 C57
2021-03-12 01:04:06 S 10 36 42.350 -50 34 10.60 V C57
2021-03-12 01:04:06 s 1 +40143.760 0 +359014.42 1020.0 C57
2021-03-12 01:14:06 S 10 36 43.051 -50 33 55.76 V C57
2021-03-12 01:14:06 s 1 +39779.868 0 +359211.46 2240.0 C57
2021-03-12 01:24:06 S 10 36 43.510 -50 33 42.70 V C57
2021-03-12 01:24:06 s 1 +39415.845 0 +359407.41 3120.0 C57
2021-03-12 01:34:06 S 10 36 44.443 -50 33 26.46 V C57
2021-03-12 01:34:06 s 1 +39051.695 0 +359602.26 3660.0 C57
2021-03-12 01:54:06 S 10 36 45.526 -50 32 55.28 V C57
2021-03-12 01:54:06 s 1 +38323.014 0 +359988.67 3700.0 C57
2021-03-12 02:04:06 S 10 36 46.090 -50 32 38.47 V C57
2021-03-12 02:04:06 s 1 +37958.486 0 +360180.24 3220.0 C57
2021-03-12 02:14:06 S 10 36 46.354 -50 32 19.97 V C57
2021-03-12 02:14:06 s 1 +37593.835 0 +360370.72 2400.0 C57
2021-03-12 02:24:06 S 10 36 46.670 -50 32 05.39 V C57
2021-03-12 02:24:06 s 1 +37229.061 0 +360560.11 1240.0 C57
2021-03-12 02:34:06 S 10 36 47.179 -50 31 49.01 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)