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
2021-03-24 15:44:06 S 10 49 56.676 -40 01 26.29 V C57
2021-03-24 15:44:06 s 1 +73969.166 0 +343072.31 7000.0 C57
2021-03-24 17:04:06 S 10 50 00.962 -39 58 59.99 V C57
2021-03-24 17:04:06 s 1 +71119.541 0 +345209.73 710.0 C57
2021-03-24 17:14:06 S 10 50 01.584 -39 58 42.53 V C57
2021-03-24 17:14:06 s 1 +70762.272 0 +345471.74 5090.0 C57
2021-03-24 17:34:06 S 10 50 02.705 -39 58 06.10 V C57
2021-03-24 17:34:06 s 1 +70047.040 0 +345992.35 2320.0 C57
2021-03-24 17:54:06 S 10 50 03.694 -39 57 30.64 V C57
2021-03-24 17:54:06 s 1 +69330.893 0 +346508.39 7550.0 C57
2021-03-24 18:04:06 S 10 50 04.330 -39 57 11.52 V C57
2021-03-24 18:04:06 s 1 +68972.481 0 +346764.70 9420.0 C57
2021-03-24 18:44:06 S 10 50 06.461 -39 55 58.84 V C57
2021-03-24 18:44:06 s 1 +67536.606 0 +347778.56 2000.0 C57
2021-03-24 19:14:06 S 10 50 08.172 -39 55 05.34 V C57
2021-03-24 19:14:06 s 1 +66457.405 0 +348527.02 8880.0 C57
2021-03-24 22:34:06 S 10 50 19.022 -39 49 01.60 V C57
2021-03-24 22:34:06 s 1 +59215.518 0 +353257.19 3490.0 C57
2021-03-24 22:44:06 S 10 50 19.483 -39 48 42.73 V C57
2021-03-24 22:44:06 s 1 +58851.390 0 +353481.92 2700.0 C57
2021-03-24 22:54:06 S 10 50 20.100 -39 48 23.90 V C57
2021-03-24 22:54:06 s 1 +58487.078 0 +353705.52 1490.0 C57
2021-03-24 23:04:06 S 10 50 20.537 -39 48 07.24 V C57
2021-03-24 23:04:06 s 1 +58122.584 0 +353928.02 9870.0 C57
2021-03-24 23:14:06 S 10 50 21.122 -39 47 49.16 V C57
2021-03-24 23:14:06 s 1 +57757.910 0 +354149.39 7850.0 C57
2021-03-24 23:24:06 S 10 50 21.660 -39 47 31.45 V C57
2021-03-24 23:24:06 s 1 +57393.057 0 +354369.65 5430.0 C57
2021-03-24 23:34:06 S 10 50 22.234 -39 47 13.63 V C57
2021-03-24 23:34:06 s 1 +57028.026 0 +354588.80 2610.0 C57
2021-03-24 23:44:06 S 10 50 22.848 -39 46 55.60 V C57
2021-03-24 23:44:06 s 1 +56662.818 0 +354806.84 9400.0 C57
2021-03-24 23:54:06 S 10 50 23.206 -39 46 38.28 V C57
2021-03-24 23:54:06 s 1 +56297.435 0 +355023.76 5790.0 C57
2021-03-25 00:04:06 S 10 50 23.806 -39 46 18.88 V C57
2021-03-25 00:04:06 s 1 +55931.879 0 +355239.57 1790.0 C57
2021-03-25 00:14:06 S 10 50 23.983 -39 45 59.72 V C57
2021-03-25 00:14:06 s 1 +55566.151 0 +355454.27 7400.0 C57
2021-03-25 01:14:06 S 10 50 27.353 -39 44 11.94 V C57
2021-03-25 01:14:06 s 1 +53368.238 0 +356719.19 3090.0 C57
2021-03-25 01:24:06 S 10 50 27.953 -39 43 53.00 V C57
2021-03-25 01:24:06 s 1 +53001.342 0 +356926.14 6070.0 C57
2021-03-25 01:34:06 S 10 50 28.541 -39 43 35.00 V C57
2021-03-25 01:34:06 s 1 +52634.284 0 +357131.98 8680.0 C57
2021-03-25 02:04:06 S 10 50 30.235 -39 42 42.48 V C57
2021-03-25 02:04:06 s 1 +51532.155 0 +357742.88 4340.0 C57
2021-03-25 02:14:06 S 10 50 31.049 -39 42 25.02 V C57
2021-03-25 02:14:06 s 1 +51164.464 0 +357944.31 5510.0 C57
2021-03-25 02:24:06 S 10 50 30.958 -39 42 03.92 V C57
2021-03-25 02:24:06 s 1 +50796.619 0 +358144.63 6330.0 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)