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
2021-03-13 19:34:06 S 10 38 18.386 -49 22 46.74 V C57
2021-03-13 19:34:06 s 1 -53836.457 0 +375331.97 8700.0 C57
2021-03-13 19:44:06 S 10 38 18.554 -49 22 29.86 V C57
2021-03-13 19:44:06 s 1 -54198.707 0 +375266.10 4270.0 C57
2021-03-13 19:54:06 S 10 38 18.444 -49 22 08.94 V C57
2021-03-13 19:54:06 s 1 -54560.826 0 +375199.23 9660.0 C57
2021-03-13 20:04:06 S 10 38 19.015 -49 21 55.94 V C57
2021-03-13 20:04:06 s 1 -54922.811 0 +375131.37 4840.0 C57
2021-03-13 20:14:06 S 10 38 19.282 -49 21 36.43 V C57
2021-03-13 20:14:06 s 1 -55284.663 0 +375062.51 9830.0 C57
2021-03-13 20:24:06 S 10 38 19.999 -49 21 19.19 V C57
2021-03-13 20:24:06 s 1 -55646.379 0 +374992.65 4630.0 C57
2021-03-13 20:34:06 S 10 38 19.716 -49 21 00.68 V C57
2021-03-13 20:34:06 s 1 -56007.960 0 +374921.80 9220.0 C57
2021-03-13 20:44:06 S 10 38 19.985 -49 20 41.71 V C57
2021-03-13 20:44:06 s 1 -56369.404 0 +374849.96 3610.0 C57
2021-03-13 20:54:06 S 10 38 20.102 -49 20 23.64 V C57
2021-03-13 20:54:06 s 1 -56730.710 0 +374777.12 7790.0 C57
2021-03-13 21:04:06 S 10 38 20.150 -49 20 08.38 V C57
2021-03-13 21:04:06 s 1 -57091.878 0 +374703.28 1770.0 C57
2021-03-13 21:14:06 S 10 38 20.698 -49 19 48.40 V C57
2021-03-13 21:14:06 s 1 -57452.905 0 +374628.45 5540.0 C57
2021-03-13 21:24:06 S 10 38 21.199 -49 19 32.09 V C57
2021-03-13 21:24:06 s 1 -57813.792 0 +374552.63 9090.0 C57
2021-03-13 21:34:06 S 10 38 20.930 -49 19 15.35 V C57
2021-03-13 21:34:06 s 1 -58174.538 0 +374475.81 2440.0 C57
2021-03-13 21:44:06 S 10 38 21.538 -49 18 57.53 V C57
2021-03-13 21:44:06 s 1 -58535.141 0 +374398.00 5570.0 C57
2021-03-13 21:54:06 S 10 38 21.677 -49 18 40.82 V C57
2021-03-13 21:54:06 s 1 -58895.600 0 +374319.19 8480.0 C57
2021-03-13 22:04:06 S 10 38 22.070 -49 18 23.80 V C57
2021-03-13 22:04:06 s 1 -59255.914 0 +374239.38 1180.0 C57
2021-03-13 22:14:06 S 10 38 22.320 -49 18 06.23 V C57
2021-03-13 22:14:06 s 1 -59616.083 0 +374158.58 3660.0 C57
2021-03-13 22:24:06 S 10 38 22.548 -49 17 47.54 V C57
2021-03-13 22:24:06 s 1 -59976.106 0 +374076.79 5910.0 C57
2021-03-13 22:34:06 S 10 38 22.709 -49 17 31.70 V C57
2021-03-13 22:34:06 s 1 -60335.981 0 +373994.00 7940.0 C57
2021-03-13 22:44:06 S 10 38 22.954 -49 17 12.80 V C57
2021-03-13 22:44:06 s 1 -60695.707 0 +373910.22 9740.0 C57
2021-03-13 22:54:06 S 10 38 23.237 -49 16 57.14 V C57
2021-03-13 22:54:06 s 1 -61055.284 0 +373825.44 1310.0 C57
2021-03-13 23:04:06 S 10 38 23.484 -49 16 38.68 V C57
2021-03-13 23:04:06 s 1 -61414.711 0 +373739.67 2660.0 C57
2021-03-13 23:14:06 S 10 38 23.832 -49 16 21.61 V C57
2021-03-13 23:14:06 s 1 -61773.986 0 +373652.90 3770.0 C57
2021-03-13 23:24:06 S 10 38 23.988 -49 16 00.84 V C57
2021-03-13 23:24:06 s 1 -62133.109 0 +373565.14 4650.0 C57
2021-03-13 23:34:06 S 10 38 23.870 -49 15 45.47 V C57
2021-03-13 23:34:06 s 1 -62492.078 0 +373476.38 5290.0 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)