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 23:34:06 S 10 53 03.420 -37 33 34.70 V C57
2021-03-27 23:34:06 s 1 -101684.68 2 +350955.22 4290.0 C57
2021-03-27 23:44:06 S 10 53 03.802 -37 33 15.73 V C57
2021-03-27 23:44:06 s 1 -102020.91 5 +350724.26 8310.0 C57
2021-03-27 23:54:06 S 10 53 03.871 -37 32 58.42 V C57
2021-03-27 23:54:06 s 1 -102356.84 2 +350492.26 1770.0 C57
2021-03-28 00:04:06 S 10 53 04.188 -37 32 37.18 V C57
2021-03-28 00:04:06 s 1 -102692.46 3 +350259.22 4660.0 C57
2021-03-28 00:14:06 S 10 53 04.476 -37 32 18.56 V C57
2021-03-28 00:14:06 s 1 -103027.77 6 +350025.13 7000.0 C57
2021-03-28 00:24:06 S 10 53 04.718 -37 31 57.72 V C57
2021-03-28 00:24:06 s 1 -103362.77 9 +349790.00 8760.0 C57
2021-03-28 00:34:06 S 10 53 05.052 -37 31 40.37 V C57
2021-03-28 00:34:06 s 1 -103697.47 1 +349553.83 9960.0 C57
2021-03-28 00:44:06 S 10 53 05.088 -37 31 20.24 V C57
2021-03-28 00:44:06 s 1 -104031.85 2 +349316.61 590.0 C57
2021-03-28 00:54:06 S 10 53 05.609 -37 31 00.26 V C57
2021-03-28 00:54:06 s 1 -104365.91 9 +349078.35 650.0 C57
2021-03-28 01:04:06 S 10 53 05.609 -37 30 41.87 V C57
2021-03-28 01:04:06 s 1 -104699.67 1 +348839.04 130.0 C57
2021-03-28 01:14:06 S 10 53 05.930 -37 30 23.58 V C57
2021-03-28 01:14:06 s 1 -105033.10 7 +348598.69 9040.0 C57
2021-03-28 01:24:06 S 10 53 06.142 -37 30 03.24 V C57
2021-03-28 01:24:06 s 1 -105366.22 6 +348357.30 7360.0 C57
2021-03-28 01:34:06 S 10 53 06.372 -37 29 43.76 V C57
2021-03-28 01:34:06 s 1 -105699.02 7 +348114.86 5100.0 C57
2021-03-28 01:44:06 S 10 53 06.638 -37 29 25.33 V C57
2021-03-28 01:44:06 s 1 -106031.50 7 +347871.37 2250.0 C57
2021-03-28 01:54:06 S 10 53 06.886 -37 29 06.72 V C57
2021-03-28 01:54:06 s 1 -106363.66 6 +347626.83 8820.0 C57
2021-03-28 02:04:06 S 10 53 07.032 -37 28 47.39 V C57
2021-03-28 02:04:06 s 1 -106695.50 2 +347381.25 4790.0 C57
2021-03-28 02:14:06 S 10 53 07.262 -37 28 28.45 V C57
2021-03-28 02:14:06 s 1 -107027.01 5 +347134.62 170.0 C57
2021-03-28 02:24:06 S 10 53 07.490 -37 28 08.76 V C57
2021-03-28 02:24:06 s 1 -107358.20 2 +346886.95 4950.0 C57
2021-03-28 02:34:06 S 10 53 07.865 -37 27 50.26 V C57
2021-03-28 02:34:06 s 1 -107689.06 2 +346638.22 9140.0 C57
2021-03-28 02:44:06 S 10 53 07.934 -37 27 29.41 V C57
2021-03-28 02:44:06 s 1 -108019.59 4 +346388.45 2720.0 C57
2021-03-28 02:54:06 S 10 53 08.273 -37 27 11.52 V C57
2021-03-28 02:54:06 s 1 -108349.79 7 +346137.63 5700.0 C57
2021-03-28 03:04:06 S 10 53 08.491 -37 26 52.73 V C57
2021-03-28 03:04:06 s 1 -108679.66 9 +345885.76 8080.0 C57
2021-03-28 03:14:06 S 10 53 08.458 -37 26 34.04 V C57
2021-03-28 03:14:06 s 1 -109009.20 9 +345632.84 9840.0 C57
2021-03-28 03:24:06 S 10 53 08.762 -37 26 12.91 V C57
2021-03-28 03:24:06 s 1 -109338.41 6 +345378.87 1000.0 C57
2021-03-28 03:34:06 S 10 53 09.041 -37 25 54.95 V C57
2021-03-28 03:34:06 s 1 -109667.28 7 +345123.85 1530.0 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)