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
2021-03-28 19:24:06 S 10 53 28.234 -36 55 16.18 V C57
2021-03-28 19:24:06 s 1 -139166.31 3 +316036.18 2680.0 C57
2021-03-28 19:34:05 S 10 53 28.450 -36 54 56.41 V C57
2021-03-28 19:34:05 s 1 -139456.01 2 +315677.97 680.0 C57
2021-03-28 19:44:06 S 10 53 28.486 -36 54 37.80 V C57
2021-03-28 19:44:06 s 1 -139745.22 2 +315318.67 7770.0 C57
2021-03-28 19:54:05 S 10 53 28.651 -36 54 17.21 V C57
2021-03-28 19:54:05 s 1 -140033.94 0 +314958.26 3950.0 C57
2021-03-28 20:04:06 S 10 53 28.975 -36 53 57.77 V C57
2021-03-28 20:04:06 s 1 -140322.16 6 +314596.75 9210.0 C57
2021-03-28 20:14:06 S 10 53 29.009 -36 53 37.57 V C57
2021-03-28 20:14:06 s 1 -140609.89 7 +314234.13 3540.0 C57
2021-03-28 20:24:06 S 10 53 29.213 -36 53 19.25 V C57
2021-03-28 20:24:06 s 1 -140897.13 1 +313870.40 6950.0 C57
2021-03-28 20:34:06 S 10 53 29.520 -36 52 59.16 V C57
2021-03-28 20:34:06 s 1 -141183.86 7 +313505.57 9430.0 C57
2021-03-28 20:44:05 S 10 53 29.506 -36 52 39.18 V C57
2021-03-28 20:44:05 s 1 -141470.10 2 +313139.63 980.0 C57
2021-03-28 20:54:06 S 10 53 29.635 -36 52 18.73 V C57
2021-03-28 20:54:06 s 1 -141755.83 4 +312772.58 1580.0 C57
2021-03-28 21:04:05 S 10 53 30.038 -36 51 58.64 V C57
2021-03-28 21:04:05 s 1 -142041.06 2 +312404.42 1250.0 C57
2021-03-28 21:14:06 S 10 53 30.106 -36 51 38.05 V C57
2021-03-28 21:14:06 s 1 -142325.78 4 +312035.15 9970.0 C57
2021-03-28 21:24:05 S 10 53 30.264 -36 51 20.81 V C57
2021-03-28 21:24:05 s 1 -142609.99 8 +311664.77 7740.0 C57
2021-03-28 21:34:06 S 10 53 30.410 -36 51 02.41 V C57
2021-03-28 21:34:06 s 1 -142893.70 1 +311293.28 4560.0 C57
2021-03-28 21:44:06 S 10 53 30.552 -36 50 41.57 V C57
2021-03-28 21:44:06 s 1 -143176.89 3 +310920.67 430.0 C57
2021-03-28 21:54:06 S 10 53 30.835 -36 50 23.32 V C57
2021-03-28 21:54:06 s 1 -143459.57 0 +310546.96 5330.0 C57
2021-03-28 22:04:06 S 10 53 31.030 -36 50 02.51 V C57
2021-03-28 22:04:06 s 1 -143741.73 2 +310172.13 9270.0 C57
2021-03-28 22:14:05 S 10 53 30.972 -36 49 42.82 V C57
2021-03-28 22:14:05 s 1 -144023.37 5 +309796.18 2240.0 C57
2021-03-28 22:24:06 S 10 53 31.265 -36 49 24.35 V C57
2021-03-28 22:24:06 s 1 -144304.49 8 +309419.12 4250.0 C57
2021-03-28 22:34:05 S 10 53 31.505 -36 49 03.00 V C57
2021-03-28 22:34:05 s 1 -144585.10 0 +309040.95 5270.0 C57
2021-03-28 22:44:06 S 10 53 31.572 -36 48 42.41 V C57
2021-03-28 22:44:06 s 1 -144865.17 7 +308661.66 5320.0 C57
2021-03-28 22:54:05 S 10 53 31.774 -36 48 24.73 V C57
2021-03-28 22:54:05 s 1 -145144.72 9 +308281.25 4380.0 C57
2021-03-28 23:04:06 S 10 53 31.925 -36 48 04.28 V C57
2021-03-28 23:04:06 s 1 -145423.75 3 +307899.72 2460.0 C57
2021-03-28 23:14:06 S 10 53 31.997 -36 47 45.78 V C57
2021-03-28 23:14:06 s 1 -145702.24 7 +307517.07 9550.0 C57
2021-03-28 23:24:06 S 10 53 32.256 -36 47 26.45 V C57
2021-03-28 23:24:06 s 1 -145980.20 9 +307133.31 5640.0 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)