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
2021-01-23 05:14:07 S 05 07 13.267 -78 44 09.49 V C57
2021-01-23 05:14:07 s 1 -170107.46 7 +302452.22 6090.0 C57
2021-01-23 05:24:07 S 05 07 21.770 -78 44 04.99 V C57
2021-01-23 05:24:07 s 1 -170323.91 4 +302035.51 3940.0 C57
2021-01-23 05:34:07 S 05 07 31.766 -78 44 02.40 V C57
2021-01-23 05:34:07 s 1 -170539.78 1 +301617.76 790.0 C57
2021-01-23 05:44:07 S 05 07 41.705 -78 44 00.17 V C57
2021-01-23 05:44:07 s 1 -170755.06 8 +301198.99 6650.0 C57
2021-01-23 05:54:08 S 05 07 51.074 -78 43 56.50 V C57
2021-01-23 05:54:08 s 1 -170969.77 1 +300779.19 1500.0 C57
2021-01-23 06:04:07 S 05 08 00.535 -78 43 51.74 V C57
2021-01-23 06:04:07 s 1 -171183.88 8 +300358.35 5350.0 C57
2021-01-23 06:14:08 S 05 08 09.857 -78 43 49.62 V C57
2021-01-23 06:14:08 s 1 -171397.41 8 +299936.49 8180.0 C57
2021-01-23 06:24:07 S 05 08 18.912 -78 43 46.06 V C57
2021-01-23 06:24:07 s 1 -171610.35 9 +299513.59 0.0 C57
2021-01-23 06:34:08 S 05 08 28.654 -78 43 40.84 V C57
2021-01-23 06:34:08 s 1 -171822.70 8 +299089.66 810.0 C57
2021-01-23 06:44:07 S 05 08 37.610 -78 43 36.84 V C57
2021-01-23 06:44:07 s 1 -172034.46 3 +298664.69 590.0 C57
2021-01-23 07:04:07 S 05 08 56.580 -78 43 30.76 V C57
2021-01-23 07:04:07 s 1 -172456.18 4 +297811.65 7080.0 C57
2021-01-23 07:14:07 S 05 09 06.672 -78 43 27.08 V C57
2021-01-23 07:14:07 s 1 -172666.14 6 +297383.57 3780.0 C57
2021-01-23 07:24:08 S 05 09 16.385 -78 43 24.71 V C57
2021-01-23 07:24:08 s 1 -172875.50 5 +296954.46 9440.0 C57
2021-01-23 07:44:08 S 05 09 36.379 -78 43 12.72 V C57
2021-01-23 07:44:08 s 1 -173292.40 9 +296093.12 7640.0 C57
2021-01-23 07:54:07 S 05 09 45.257 -78 43 11.89 V C57
2021-01-23 07:54:07 s 1 -173499.94 9 +295660.88 180.0 C57
2021-01-23 08:04:07 S 05 09 54.552 -78 43 07.43 V C57
2021-01-23 08:04:07 s 1 -173706.87 8 +295227.61 1660.0 C57
2021-01-23 08:14:07 S 05 10 04.277 -78 43 02.28 V C57
2021-01-23 08:14:07 s 1 -173913.19 5 +294793.30 2090.0 C57
2021-01-23 08:24:07 S 05 10 13.567 -78 42 59.72 V C57
2021-01-23 08:24:07 s 1 -174118.89 6 +294357.94 1450.0 C57
2021-01-23 08:34:07 S 05 10 23.052 -78 42 56.66 V C57
2021-01-23 08:34:07 s 1 -174323.98 1 +293921.53 9760.0 C57
2021-01-23 08:44:07 S 05 10 32.242 -78 42 50.76 V C57
2021-01-23 08:44:07 s 1 -174528.44 5 +293484.09 7000.0 C57
2021-01-23 08:54:08 S 05 10 41.950 -78 42 49.32 V C57
2021-01-23 08:54:08 s 1 -174732.28 9 +293045.60 3170.0 C57
2021-01-23 09:04:07 S 05 10 51.250 -78 42 43.99 V C57
2021-01-23 09:04:07 s 1 -174935.50 8 +292606.06 8260.0 C57
2021-01-23 09:14:08 S 05 11 00.955 -78 42 42.16 V C57
2021-01-23 09:14:08 s 1 -175138.10 1 +292165.47 2280.0 C57
2021-01-23 09:24:07 S 05 11 08.604 -78 42 34.63 V C57
2021-01-23 09:24:07 s 1 -175340.06 6 +291723.84 5210.0 C57
2021-01-23 09:34:07 S 05 11 20.342 -78 42 31.54 V C57
2021-01-23 09:34:07 s 1 -175541.40 0 +291281.15 7060.0 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)