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
2021-03-23 13:34:06 S 10 48 14.969 -40 48 40.54 V C57
2021-03-23 13:34:06 s 1 +125521.72 7 +285523.96 2620.0 C57
2021-03-23 13:44:06 S 10 48 15.542 -40 48 23.58 V C57
2021-03-23 13:44:06 s 1 +125228.86 9 +285989.76 3650.0 C57
2021-03-23 13:54:06 S 10 48 16.435 -40 48 04.82 V C57
2021-03-23 13:54:06 s 1 +124935.42 2 +286454.21 3450.0 C57
2021-03-23 14:04:06 S 10 48 17.076 -40 47 46.25 V C57
2021-03-23 14:04:06 s 1 +124641.39 1 +286917.32 2040.0 C57
2021-03-23 14:14:06 S 10 48 17.753 -40 47 30.01 V C57
2021-03-23 14:14:06 s 1 +124346.77 8 +287379.08 9420.0 C57
2021-03-23 14:24:06 S 10 48 18.461 -40 47 09.89 V C57
2021-03-23 14:24:06 s 1 +124051.58 6 +287839.50 5590.0 C57
2021-03-23 14:34:06 S 10 48 19.289 -40 46 51.60 V C57
2021-03-23 14:34:06 s 1 +123755.81 8 +288298.58 560.0 C57
2021-03-23 14:44:06 S 10 48 19.937 -40 46 33.67 V C57
2021-03-23 14:44:06 s 1 +123459.47 8 +288756.31 4340.0 C57
2021-03-23 14:54:06 S 10 48 20.628 -40 46 17.40 V C57
2021-03-23 14:54:06 s 1 +123162.56 8 +289212.72 6920.0 C57
2021-03-23 15:04:06 S 10 48 21.461 -40 45 56.77 V C57
2021-03-23 15:04:06 s 1 +122865.09 1 +289667.78 8330.0 C57
2021-03-23 15:14:06 S 10 48 22.186 -40 45 40.18 V C57
2021-03-23 15:14:06 s 1 +122567.05 0 +290121.51 8560.0 C57
2021-03-23 15:24:06 S 10 48 22.858 -40 45 22.93 V C57
2021-03-23 15:24:06 s 1 +122268.44 8 +290573.91 7620.0 C57
2021-03-23 15:34:06 S 10 48 23.640 -40 45 05.44 V C57
2021-03-23 15:34:06 s 1 +121969.28 9 +291024.98 5520.0 C57
2021-03-23 15:44:06 S 10 48 24.238 -40 44 47.51 V C57
2021-03-23 15:44:06 s 1 +121669.57 4 +291474.72 2260.0 C57
2021-03-23 16:04:06 S 10 48 25.812 -40 44 08.88 V C57
2021-03-23 16:04:06 s 1 +121068.49 1 +292370.22 2280.0 C57
2021-03-23 16:14:06 S 10 48 26.534 -40 43 53.40 V C57
2021-03-23 16:14:06 s 1 +120767.12 9 +292815.98 5580.0 C57
2021-03-23 16:24:06 S 10 48 27.125 -40 43 34.57 V C57
2021-03-23 16:24:06 s 1 +120465.22 3 +293260.42 7740.0 C57
2021-03-23 16:34:06 S 10 48 27.866 -40 43 15.38 V C57
2021-03-23 16:34:06 s 1 +120162.77 6 +293703.53 8770.0 C57
2021-03-23 16:44:06 S 10 48 28.500 -40 42 58.07 V C57
2021-03-23 16:44:06 s 1 +119859.79 1 +294145.33 8680.0 C57
2021-03-23 16:54:06 S 10 48 29.213 -40 42 39.74 V C57
2021-03-23 16:54:06 s 1 +119556.27 1 +294585.81 7460.0 C57
2021-03-23 17:04:06 S 10 48 29.947 -40 42 22.54 V C57
2021-03-23 17:04:06 s 1 +119252.21 9 +295024.97 5140.0 C57
2021-03-23 17:14:06 S 10 48 31.039 -40 42 02.34 V C57
2021-03-23 17:14:06 s 1 +118947.63 8 +295462.81 1710.0 C57
2021-03-23 17:24:06 S 10 48 31.471 -40 41 46.72 V C57
2021-03-23 17:24:06 s 1 +118642.52 9 +295899.35 7170.0 C57
2021-03-23 17:34:06 S 10 48 31.718 -40 41 24.11 V C57
2021-03-23 17:34:06 s 1 +118336.89 7 +296334.57 1540.0 C57
2021-03-23 17:44:06 S 10 48 32.729 -40 41 09.02 V C57
2021-03-23 17:44:06 s 1 +118030.74 4 +296768.48 4820.0 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)