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
2021-03-12 07:04:06 s 1 +26970.717 0 +365422.82 4150.0 C57
2021-03-12 07:14:06 S 10 37 00.922 -50 24 10.66 V C57
2021-03-12 07:14:06 s 1 +26602.924 0 +365580.88 4440.0 C57
2021-03-12 07:24:06 S 10 37 01.392 -50 23 54.92 V C57
2021-03-12 07:24:06 s 1 +26235.043 0 +365737.86 4470.0 C57
2021-03-12 07:34:06 S 10 37 01.884 -50 23 40.02 V C57
2021-03-12 07:34:06 s 1 +25867.077 0 +365893.77 4240.0 C57
2021-03-12 07:44:06 S 10 37 02.542 -50 23 23.24 V C57
2021-03-12 07:44:06 s 1 +25499.027 0 +366048.61 3760.0 C57
2021-03-12 07:54:06 S 10 37 03.022 -50 23 05.86 V C57
2021-03-12 07:54:06 s 1 +25130.893 0 +366202.39 3030.0 C57
2021-03-12 08:04:06 S 10 37 02.825 -50 22 49.01 V C57
2021-03-12 08:04:06 s 1 +24762.677 0 +366355.10 2050.0 C57
2021-03-12 08:14:06 S 10 37 03.526 -50 22 32.05 V C57
2021-03-12 08:14:06 s 1 +24394.381 0 +366506.74 820.0 C57
2021-03-12 08:24:06 S 10 37 04.450 -50 22 16.46 V C57
2021-03-12 08:24:06 s 1 +24026.004 0 +366657.31 9350.0 C57
2021-03-12 08:34:06 S 10 37 04.565 -50 22 00.55 V C57
2021-03-12 08:34:06 s 1 +23657.549 0 +366806.82 7630.0 C57
2021-03-12 08:44:06 S 10 37 05.093 -50 21 41.98 V C57
2021-03-12 08:44:06 s 1 +23289.017 0 +366955.27 5680.0 C57
2021-03-12 08:54:06 S 10 37 05.746 -50 21 24.84 V C57
2021-03-12 08:54:06 s 1 +22920.407 0 +367102.65 3480.0 C57
2021-03-12 09:04:06 S 10 37 05.976 -50 21 10.44 V C57
2021-03-12 09:04:06 s 1 +22551.723 0 +367248.96 1050.0 C57
2021-03-12 09:14:06 S 10 37 06.612 -50 20 52.55 V C57
2021-03-12 09:14:06 s 1 +22182.964 0 +367394.21 8390.0 C57
2021-03-12 09:24:06 S 10 37 06.982 -50 20 36.53 V C57
2021-03-12 09:24:06 s 1 +21814.133 0 +367538.40 5500.0 C57
2021-03-12 09:34:06 S 10 37 07.586 -50 20 18.60 V C57
2021-03-12 09:34:06 s 1 +21445.229 0 +367681.53 2380.0 C57
2021-03-12 09:44:06 S 10 37 07.872 -50 20 05.06 V C57
2021-03-12 09:44:06 s 1 +21076.254 0 +367823.60 9040.0 C57
2021-03-12 09:54:06 S 10 37 08.285 -50 19 47.21 V C57
2021-03-12 09:54:06 s 1 +20707.210 0 +367964.60 5470.0 C57
2021-03-12 10:04:06 S 10 37 08.542 -50 19 32.23 V C57
2021-03-12 10:04:06 s 1 +20338.097 0 +368104.55 1680.0 C57
2021-03-12 10:14:06 S 10 37 09.353 -50 19 17.33 V C57
2021-03-12 10:14:06 s 1 +19968.916 0 +368243.43 7670.0 C57
2021-03-12 10:34:06 S 10 37 09.874 -50 18 44.03 V C57
2021-03-12 10:34:06 s 1 +19230.357 0 +368518.03 9000.0 C57
2021-03-12 10:44:06 S 10 37 10.406 -50 18 26.17 V C57
2021-03-12 10:44:06 s 1 +18860.980 0 +368653.74 4340.0 C57
2021-03-12 10:54:06 S 10 37 10.642 -50 18 05.18 V C57
2021-03-12 10:54:06 s 1 +18491.540 0 +368788.39 9480.0 C57
2021-03-12 11:24:06 S 10 37 12.214 -50 17 19.54 V C57
2021-03-12 11:24:06 s 1 +17382.853 0 +369186.01 3650.0 C57
2021-03-12 11:34:06 S 10 37 12.617 -50 17 03.62 V C57
2021-03-12 11:34:06 s 1 +17013.171 0 +369316.44 7970.0 C57
2021-03-12 11:44:06 S 10 37 13.286 -50 16 46.45 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)