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
2021-03-26 18:44:06 S 10 52 13.404 -38 27 57.56 V C57
2021-03-26 18:44:06 s 1 -39963.255 0 +375446.34 5740.0 C57
2021-03-26 18:54:06 S 10 52 13.728 -38 27 36.43 V C57
2021-03-26 18:54:06 s 1 -40334.826 0 +375392.41 2330.0 C57
2021-03-26 19:04:06 S 10 52 14.078 -38 27 20.02 V C57
2021-03-26 19:04:06 s 1 -40706.285 0 +375337.47 8740.0 C57
2021-03-26 19:14:06 S 10 52 14.386 -38 27 02.38 V C57
2021-03-26 19:14:06 s 1 -41077.630 0 +375281.51 4960.0 C57
2021-03-26 19:24:06 S 10 52 14.858 -38 26 43.30 V C57
2021-03-26 19:24:06 s 1 -41448.861 0 +375224.54 990.0 C57
2021-03-26 19:34:06 S 10 52 15.120 -38 26 24.29 V C57
2021-03-26 19:34:06 s 1 -41819.977 0 +375166.55 6840.0 C57
2021-03-26 19:44:06 S 10 52 15.362 -38 26 05.60 V C57
2021-03-26 19:44:06 s 1 -42190.977 0 +375107.54 2500.0 C57
2021-03-26 19:54:06 S 10 52 15.864 -38 25 44.90 V C57
2021-03-26 19:54:06 s 1 -42561.860 0 +375047.52 7960.0 C57
2021-03-26 20:04:06 S 10 52 16.145 -38 25 27.59 V C57
2021-03-26 20:04:06 s 1 -42932.625 0 +374986.48 3230.0 C57
2021-03-26 20:14:06 S 10 52 16.524 -38 25 09.01 V C57
2021-03-26 20:14:06 s 1 -43303.270 0 +374924.42 8310.0 C57
2021-03-26 20:24:06 S 10 52 16.824 -38 24 50.62 V C57
2021-03-26 20:24:06 s 1 -43673.795 0 +374861.35 3180.0 C57
2021-03-26 20:34:06 S 10 52 17.150 -38 24 32.65 V C57
2021-03-26 20:34:06 s 1 -44044.199 0 +374797.26 7860.0 C57
2021-03-26 20:44:06 S 10 52 17.609 -38 24 13.14 V C57
2021-03-26 20:44:06 s 1 -44414.480 0 +374732.16 2330.0 C57
2021-03-26 20:54:06 S 10 52 17.786 -38 23 54.74 V C57
2021-03-26 20:54:06 s 1 -44784.638 0 +374666.04 6610.0 C57
2021-03-26 21:04:06 S 10 52 18.199 -38 23 36.92 V C57
2021-03-26 21:04:06 s 1 -45154.672 0 +374598.90 670.0 C57
2021-03-26 21:14:06 S 10 52 18.434 -38 23 16.48 V C57
2021-03-26 21:14:06 s 1 -45524.580 0 +374530.75 4530.0 C57
2021-03-26 21:24:06 S 10 52 18.914 -38 22 59.45 V C57
2021-03-26 21:24:06 s 1 -45894.362 0 +374461.58 8170.0 C57
2021-03-26 21:34:06 S 10 52 19.013 -38 22 39.79 V C57
2021-03-26 21:34:06 s 1 -46264.017 0 +374391.40 1610.0 C57
2021-03-26 22:04:06 S 10 52 20.263 -38 21 43.88 V C57
2021-03-26 22:04:06 s 1 -47372.206 0 +374174.75 620.0 C57
2021-03-26 22:14:06 S 10 52 20.503 -38 21 25.63 V C57
2021-03-26 22:14:06 s 1 -47741.341 0 +374100.50 3180.0 C57
2021-03-26 22:24:06 S 10 52 20.801 -38 21 06.80 V C57
2021-03-26 22:24:06 s 1 -48110.343 0 +374025.24 5530.0 C57
2021-03-26 22:34:06 S 10 52 21.079 -38 20 47.22 V C57
2021-03-26 22:34:06 s 1 -48479.212 0 +373948.96 7650.0 C57
2021-03-26 22:44:06 S 10 52 21.478 -38 20 28.32 V C57
2021-03-26 22:44:06 s 1 -48847.946 0 +373871.67 9540.0 C57
2021-03-26 22:54:06 S 10 52 21.660 -38 20 10.32 V C57
2021-03-26 22:54:06 s 1 -49216.545 0 +373793.36 1210.0 C57
2021-03-26 23:04:06 S 10 52 22.171 -38 19 51.85 V C57
2021-03-26 23:04:06 s 1 -49585.007 0 +373714.03 2640.0 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)