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
2021-03-17 10:54:06 s 1 -195372.22 0 +198720.57 9920.0 C57
2021-03-17 11:04:06 S 10 38 46.370 -46 33 46.94 V C57
2021-03-17 11:04:06 s 1 -195461.15 8 +198085.34 3270.0 C57
2021-03-17 11:14:06 S 10 38 46.327 -46 33 25.67 V C57
2021-03-17 11:14:06 s 1 -195548.83 4 +197448.82 4250.0 C57
2021-03-17 11:24:06 S 10 38 46.157 -46 33 02.88 V C57
2021-03-17 11:24:06 s 1 -195635.24 3 +196811.00 2830.0 C57
2021-03-17 11:34:06 S 10 38 46.169 -46 32 41.17 V C57
2021-03-17 11:34:06 s 1 -195720.37 9 +196171.89 9000.0 C57
2021-03-17 11:44:06 S 10 38 45.876 -46 32 18.42 V C57
2021-03-17 11:44:06 s 1 -195804.23 6 +195531.48 2760.0 C57
2021-03-17 12:04:06 S 10 38 45.811 -46 31 35.44 V C57
2021-03-17 12:04:06 s 1 -195968.09 0 +194246.77 2970.0 C57
2021-03-17 12:14:06 S 10 38 45.598 -46 31 17.08 V C57
2021-03-17 12:14:06 s 1 -196048.07 4 +193602.46 9400.0 C57
2021-03-17 12:24:06 S 10 38 45.420 -46 30 52.31 V C57
2021-03-17 12:24:06 s 1 -196126.75 5 +192956.84 3370.0 C57
2021-03-17 12:34:06 S 10 38 45.319 -46 30 28.58 V C57
2021-03-17 12:34:06 s 1 -196204.12 8 +192309.93 4860.0 C57
2021-03-17 12:44:06 S 10 38 45.192 -46 30 09.68 V C57
2021-03-17 12:44:06 s 1 -196280.18 5 +191661.71 3860.0 C57
2021-03-17 12:54:06 S 10 38 45.038 -46 29 45.64 V C57
2021-03-17 12:54:06 s 1 -196354.92 1 +191012.19 370.0 C57
2021-03-17 13:04:06 S 10 38 44.825 -46 29 22.60 V C57
2021-03-17 13:04:06 s 1 -196428.32 9 +190361.36 4360.0 C57
2021-03-17 13:14:06 S 10 38 44.940 -46 29 03.37 V C57
2021-03-17 13:14:06 s 1 -196500.40 3 +189709.22 5830.0 C57
2021-03-17 13:24:06 S 10 38 44.705 -46 28 40.51 V C57
2021-03-17 13:24:06 s 1 -196571.13 8 +189055.77 4770.0 C57
2021-03-17 13:34:06 S 10 38 44.561 -46 28 18.41 V C57
2021-03-17 13:34:06 s 1 -196640.52 6 +188401.01 1160.0 C57
2021-03-17 13:44:06 S 10 38 44.297 -46 27 58.54 V C57
2021-03-17 13:44:06 s 1 -196708.56 1 +187744.94 4980.0 C57
2021-03-17 13:54:06 S 10 38 44.417 -46 27 33.55 V C57
2021-03-17 13:54:06 s 1 -196775.23 7 +187087.56 6240.0 C57
2021-03-17 14:04:06 S 10 38 44.275 -46 27 14.44 V C57
2021-03-17 14:04:06 s 1 -196840.54 7 +186428.87 4910.0 C57
2021-03-17 14:14:06 S 10 38 44.088 -46 26 49.13 V C57
2021-03-17 14:14:06 s 1 -196904.48 6 +185768.86 990.0 C57
2021-03-17 14:24:06 S 10 38 44.028 -46 26 29.62 V C57
2021-03-17 14:24:06 s 1 -196967.04 5 +185107.54 4460.0 C57
2021-03-17 14:34:06 S 10 38 43.843 -46 26 07.66 V C57
2021-03-17 14:34:06 s 1 -197028.21 9 +184444.90 5300.0 C57
2021-03-17 14:44:06 S 10 38 43.704 -46 25 44.26 V C57
2021-03-17 14:44:06 s 1 -197088.00 2 +183780.94 3510.0 C57
2021-03-17 14:54:06 S 10 38 43.711 -46 25 21.32 V C57
2021-03-17 14:54:06 s 1 -197146.38 5 +183115.66 9070.0 C57
2021-03-17 15:04:06 S 10 38 43.490 -46 25 02.57 V C57
2021-03-17 15:04:06 s 1 -197203.36 4 +182449.06 1970.0 C57
2021-03-17 15:14:06 S 10 38 43.174 -46 24 37.12 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)