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 23:14:06 S 10 52 22.526 -38 19 33.92 V C57
2021-03-26 23:14:06 s 1 -49953.331 0 +373633.69 3850.0 C57
2021-03-26 23:24:06 S 10 52 22.747 -38 19 15.10 V C57
2021-03-26 23:24:06 s 1 -50321.516 0 +373552.33 4820.0 C57
2021-03-26 23:34:06 S 10 52 22.997 -38 18 56.74 V C57
2021-03-26 23:34:06 s 1 -50689.562 0 +373469.95 5550.0 C57
2021-03-26 23:44:06 S 10 52 23.347 -38 18 37.22 V C57
2021-03-26 23:44:06 s 1 -51057.467 0 +373386.56 6040.0 C57
2021-03-26 23:54:06 S 10 52 23.777 -38 18 18.86 V C57
2021-03-26 23:54:06 s 1 -51425.231 0 +373302.16 6300.0 C57
2021-03-27 00:04:06 S 10 52 24.026 -38 17 58.45 V C57
2021-03-27 00:04:06 s 1 -51792.851 0 +373216.73 6310.0 C57
2021-03-27 00:14:06 S 10 52 24.343 -38 17 39.84 V C57
2021-03-27 00:14:06 s 1 -52160.328 0 +373130.30 6080.0 C57
2021-03-27 00:24:06 S 10 52 24.713 -38 17 22.81 V C57
2021-03-27 00:24:06 s 1 -52527.659 0 +373042.84 5600.0 C57
2021-03-27 00:34:06 S 10 52 25.022 -38 17 03.52 V C57
2021-03-27 00:34:06 s 1 -52894.845 0 +372954.37 4880.0 C57
2021-03-27 00:44:06 S 10 52 25.414 -38 16 45.19 V C57
2021-03-27 00:44:06 s 1 -53261.884 0 +372864.89 3900.0 C57
2021-03-27 00:54:06 S 10 52 25.704 -38 16 25.32 V C57
2021-03-27 00:54:06 s 1 -53628.775 0 +372774.38 2670.0 C57
2021-03-27 01:44:06 S 10 52 26.546 -38 14 57.30 V C57
2021-03-27 01:44:06 s 1 -55460.973 0 +372306.63 2670.0 C57
2021-03-27 01:54:06 S 10 52 27.475 -38 14 29.94 V C57
2021-03-27 01:54:06 s 1 -55826.954 0 +372210.03 9880.0 C57
2021-03-27 02:04:06 S 10 52 27.689 -38 14 15.04 V C57
2021-03-27 02:04:06 s 1 -56192.780 0 +372112.42 6830.0 C57
2021-03-27 02:34:06 S 10 52 28.709 -38 13 18.80 V C57
2021-03-27 02:34:06 s 1 -57289.315 0 +371813.47 6050.0 C57
2021-03-27 02:44:06 S 10 52 29.105 -38 12 59.62 V C57
2021-03-27 02:44:06 s 1 -57654.509 0 +371711.79 1910.0 C57
2021-03-27 02:54:06 S 10 52 29.441 -38 12 41.51 V C57
2021-03-27 02:54:06 s 1 -58019.543 0 +371609.10 7500.0 C57
2021-03-27 03:04:06 S 10 52 29.678 -38 12 22.07 V C57
2021-03-27 03:04:06 s 1 -58384.415 0 +371505.38 2800.0 C57
2021-03-27 03:14:06 S 10 52 29.974 -38 12 03.82 V C57
2021-03-27 03:14:06 s 1 -58749.125 0 +371400.65 7830.0 C57
2021-03-27 03:24:06 S 10 52 30.353 -38 11 45.13 V C57
2021-03-27 03:24:06 s 1 -59113.671 0 +371294.90 2570.0 C57
2021-03-27 03:34:06 S 10 52 30.610 -38 11 25.51 V C57
2021-03-27 03:34:06 s 1 -59478.052 0 +371188.14 7030.0 C57
2021-03-27 03:44:06 S 10 52 30.986 -38 11 06.90 V C57
2021-03-27 03:44:06 s 1 -59842.267 0 +371080.36 1190.0 C57
2021-03-27 03:54:06 S 10 52 31.178 -38 10 48.04 V C57
2021-03-27 03:54:06 s 1 -60206.316 0 +370971.56 5070.0 C57
2021-03-27 04:04:06 S 10 52 31.445 -38 10 28.85 V C57
2021-03-27 04:04:06 s 1 -60570.197 0 +370861.75 8660.0 C57
2021-03-27 04:14:06 S 10 52 31.788 -38 10 10.24 V C57
2021-03-27 04:14:06 s 1 -60933.909 0 +370750.92 1960.0 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)