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
2021-03-15 12:34:06 S 10 38 55.692 -48 08 05.21 V C57
2021-03-15 12:34:06 s 1 -136423.71 0 +328952.84 5650.0 C57
2021-03-15 12:44:06 S 10 38 56.050 -48 07 46.63 V C57
2021-03-15 12:44:06 s 1 -136720.93 7 +328638.50 8500.0 C57
2021-03-15 12:54:06 S 10 38 56.165 -48 07 24.85 V C57
2021-03-15 12:54:06 s 1 -137017.76 3 +328323.13 410.0 C57
2021-03-15 13:04:06 S 10 38 56.081 -48 07 07.43 V C57
2021-03-15 13:04:06 s 1 -137315.07 0 +328007.43 4220.0 C57
2021-03-15 13:14:06 S 10 38 56.246 -48 06 48.82 V C57
2021-03-15 13:14:06 s 1 -137610.98 1 +327689.91 5110.0 C57
2021-03-15 13:24:06 S 10 38 56.350 -48 06 30.49 V C57
2021-03-15 13:24:06 s 1 -137906.51 3 +327371.37 4840.0 C57
2021-03-15 13:34:06 S 10 38 56.328 -48 06 12.74 V C57
2021-03-15 13:34:06 s 1 -138201.61 6 +327051.79 3780.0 C57
2021-03-15 13:44:06 S 10 38 56.182 -48 05 51.00 V C57
2021-03-15 13:44:06 s 1 -138496.29 0 +326731.15 1940.0 C57
2021-03-15 13:54:06 S 10 38 56.028 -48 05 31.74 V C57
2021-03-15 13:54:06 s 1 -138790.53 2 +326409.46 9320.0 C57
2021-03-15 14:04:06 S 10 38 56.359 -48 05 09.64 V C57
2021-03-15 14:04:06 s 1 -139084.34 2 +326086.72 5900.0 C57
2021-03-15 14:24:06 S 10 38 56.494 -48 04 35.83 V C57
2021-03-15 14:24:06 s 1 -139670.65 5 +325438.08 6680.0 C57
2021-03-15 14:34:06 S 10 38 56.554 -48 04 14.16 V C57
2021-03-15 14:34:06 s 1 -139963.15 5 +325112.18 870.0 C57
2021-03-15 14:44:06 S 10 38 56.390 -48 03 58.21 V C57
2021-03-15 14:44:06 s 1 -140255.21 6 +324785.23 4260.0 C57
2021-03-15 14:54:06 S 10 38 56.566 -48 03 34.85 V C57
2021-03-15 14:54:06 s 1 -140546.83 5 +324457.22 6840.0 C57
2021-03-15 15:04:06 S 10 38 56.549 -48 03 18.40 V C57
2021-03-15 15:04:06 s 1 -140838.01 2 +324128.15 8600.0 C57
2021-03-15 15:14:06 S 10 38 56.642 -48 02 58.38 V C57
2021-03-15 15:14:06 s 1 -141128.74 5 +323798.03 9560.0 C57
2021-03-15 15:24:06 S 10 38 56.786 -48 02 41.28 V C57
2021-03-15 15:24:06 s 1 -141419.03 1 +323466.86 9700.0 C57
2021-03-15 15:34:06 S 10 38 56.942 -48 02 23.50 V C57
2021-03-15 15:34:06 s 1 -141708.87 0 +323134.63 9020.0 C57
2021-03-15 15:44:06 S 10 38 56.904 -48 01 59.70 V C57
2021-03-15 15:44:06 s 1 -141998.25 9 +322801.34 7520.0 C57
2021-03-15 15:54:06 S 10 38 56.928 -48 01 41.09 V C57
2021-03-15 15:54:06 s 1 -142287.19 7 +322466.99 5190.0 C57
2021-03-15 16:04:06 S 10 38 56.765 -48 01 22.73 V C57
2021-03-15 16:04:06 s 1 -142575.68 3 +322131.58 2030.0 C57
2021-03-15 16:14:06 S 10 38 57.048 -48 01 05.92 V C57
2021-03-15 16:14:06 s 1 -142863.71 4 +321795.12 8040.0 C57
2021-03-15 16:24:06 S 10 38 56.837 -48 00 43.78 V C57
2021-03-15 16:24:06 s 1 -143151.28 9 +321457.59 3210.0 C57
2021-03-15 16:34:06 S 10 38 56.866 -48 00 26.53 V C57
2021-03-15 16:34:06 s 1 -143438.40 6 +321119.01 7540.0 C57
2021-03-15 16:44:06 S 10 38 57.079 -48 00 06.19 V C57
2021-03-15 16:44:06 s 1 -143725.06 3 +320779.36 1030.0 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)