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
2021-01-29 11:34:07 S 07 42 20.640 -76 53 46.03 V C57
2021-01-29 11:34:07 s 1 +142722.82 6 +219138.61 6520.0 C57
2021-01-29 11:44:07 S 07 42 28.058 -76 53 46.00 V C57
2021-01-29 11:44:07 s 1 +142540.82 4 +219809.82 6600.0 C57
2021-01-29 11:54:07 S 07 42 35.477 -76 53 47.18 V C57
2021-01-29 11:54:07 s 1 +142357.70 0 +220479.29 4590.0 C57
2021-01-29 12:04:07 S 07 42 42.187 -76 53 47.47 V C57
2021-01-29 12:04:07 s 1 +142173.45 9 +221147.03 530.0 C57
2021-01-29 12:14:07 S 07 42 49.445 -76 53 46.14 V C57
2021-01-29 12:14:07 s 1 +141988.11 0 +221813.04 4400.0 C57
2021-01-29 12:24:07 S 07 42 55.332 -76 53 41.89 V C57
2021-01-29 12:24:07 s 1 +141801.65 9 +222477.33 6240.0 C57
2021-01-29 12:34:07 S 07 43 02.270 -76 53 38.58 V C57
2021-01-29 12:34:07 s 1 +141614.11 3 +223139.89 6050.0 C57
2021-01-29 12:44:07 S 07 43 09.218 -76 53 42.43 V C57
2021-01-29 12:44:07 s 1 +141425.48 0 +223800.74 3840.0 C57
2021-01-29 12:54:07 S 07 43 15.943 -76 53 40.85 V C57
2021-01-29 12:54:07 s 1 +141235.76 7 +224459.87 9630.0 C57
2021-01-29 13:04:07 S 07 43 22.901 -76 53 38.11 V C57
2021-01-29 13:04:07 s 1 +141044.98 0 +225117.29 3440.0 C57
2021-01-29 13:14:07 S 07 43 28.886 -76 53 40.81 V C57
2021-01-29 13:14:07 s 1 +140853.12 6 +225773.00 5260.0 C57
2021-01-29 13:24:07 S 07 43 36.175 -76 53 39.23 V C57
2021-01-29 13:24:07 s 1 +140660.21 2 +226427.02 5120.0 C57
2021-01-29 13:34:07 S 07 43 43.090 -76 53 37.36 V C57
2021-01-29 13:34:07 s 1 +140466.24 5 +227079.33 3020.0 C57
2021-01-29 13:44:07 S 07 43 49.190 -76 53 36.60 V C57
2021-01-29 13:44:07 s 1 +140271.23 1 +227729.94 8990.0 C57
2021-01-29 13:54:07 S 07 43 56.249 -76 53 35.41 V C57
2021-01-29 13:54:07 s 1 +140075.17 7 +228378.87 3020.0 C57
2021-01-29 14:04:07 S 07 44 02.981 -76 53 36.28 V C57
2021-01-29 14:04:07 s 1 +139878.09 0 +229026.10 5140.0 C57
2021-01-29 14:14:07 S 07 44 09.802 -76 53 33.50 V C57
2021-01-29 14:14:07 s 1 +139679.97 6 +229671.65 5350.0 C57
2021-01-29 14:24:07 S 07 44 16.070 -76 53 32.39 V C57
2021-01-29 14:24:07 s 1 +139480.84 2 +230315.52 3670.0 C57
2021-01-29 14:34:07 S 07 44 23.009 -76 53 30.41 V C57
2021-01-29 14:34:07 s 1 +139280.69 4 +230957.71 110.0 C57
2021-01-29 14:44:07 S 07 44 29.486 -76 53 29.90 V C57
2021-01-29 14:44:07 s 1 +139079.53 8 +231598.22 4680.0 C57
2021-01-29 14:54:07 S 07 44 36.290 -76 53 29.15 V C57
2021-01-29 14:54:07 s 1 +138877.38 1 +232237.06 7390.0 C57
2021-01-29 15:04:07 S 07 44 42.581 -76 53 28.97 V C57
2021-01-29 15:04:07 s 1 +138674.22 9 +232874.24 8260.0 C57
2021-01-29 15:14:07 S 07 44 49.879 -76 53 24.36 V C57
2021-01-29 15:14:07 s 1 +138470.08 9 +233509.75 7280.0 C57
2021-01-29 15:24:07 S 07 44 56.230 -76 53 25.48 V C57
2021-01-29 15:24:07 s 1 +138264.96 5 +234143.60 4490.0 C57
2021-01-29 15:34:07 S 07 45 03.346 -76 53 24.72 V C57
2021-01-29 15:34:07 s 1 +138058.86 6 +234775.79 9880.0 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)