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 07:54:06 S 10 53 14.786 -37 17 33.65 V C57
2021-03-28 07:54:06 s 1 -118095.83 8 +338123.18 1020.0 C57
2021-03-28 08:04:06 S 10 53 14.938 -37 17 13.42 V C57
2021-03-28 08:04:06 s 1 -118415.13 7 +337839.63 3940.0 C57
2021-03-28 08:14:06 S 10 53 15.307 -37 16 55.81 V C57
2021-03-28 08:14:06 s 1 -118734.06 1 +337555.02 6170.0 C57
2021-03-28 08:24:06 S 10 53 15.360 -37 16 35.11 V C57
2021-03-28 08:24:06 s 1 -119052.60 9 +337269.34 7710.0 C57
2021-03-28 08:34:06 S 10 53 15.679 -37 16 17.33 V C57
2021-03-28 08:34:06 s 1 -119370.77 9 +336982.60 8550.0 C57
2021-03-28 08:44:06 S 10 53 15.998 -37 15 59.11 V C57
2021-03-28 08:44:06 s 1 -119688.57 0 +336694.80 8690.0 C57
2021-03-28 08:54:06 S 10 53 15.910 -37 15 39.28 V C57
2021-03-28 08:54:06 s 1 -120005.98 0 +336405.93 8120.0 C57
2021-03-28 09:54:06 S 10 53 17.318 -37 13 39.97 V C57
2021-03-28 09:54:06 s 1 -121902.36 1 +334650.32 9820.0 C57
2021-03-28 10:04:06 S 10 53 17.470 -37 13 23.45 V C57
2021-03-28 10:04:06 s 1 -122217.06 4 +334353.98 4250.0 C57
2021-03-28 10:14:06 S 10 53 17.750 -37 13 04.66 V C57
2021-03-28 10:14:06 s 1 -122531.37 4 +334056.57 7960.0 C57
2021-03-28 10:24:06 S 10 53 17.890 -37 12 44.10 V C57
2021-03-28 10:24:06 s 1 -122845.28 9 +333758.10 940.0 C57
2021-03-28 10:34:06 S 10 53 18.178 -37 12 23.98 V C57
2021-03-28 10:34:06 s 1 -123158.80 9 +333458.55 3190.0 C57
2021-03-28 10:44:06 S 10 53 18.319 -37 12 06.41 V C57
2021-03-28 10:44:06 s 1 -123471.93 1 +333157.93 4700.0 C57
2021-03-28 10:54:05 S 10 53 18.516 -37 11 45.60 V C57
2021-03-28 10:54:05 s 1 -123784.65 4 +332856.24 5470.0 C57
2021-03-28 11:04:06 S 10 53 18.583 -37 11 26.92 V C57
2021-03-28 11:04:06 s 1 -124096.97 6 +332553.48 5500.0 C57
2021-03-28 13:14:06 S 10 53 21.446 -37 07 15.67 V C57
2021-03-28 13:14:06 s 1 -128119.99 0 +328519.79 7080.0 C57
2021-03-28 13:24:06 S 10 53 21.631 -37 06 57.10 V C57
2021-03-28 13:24:06 s 1 -128426.53 7 +328201.97 6420.0 C57
2021-03-28 13:34:06 S 10 53 21.653 -37 06 37.19 V C57
2021-03-28 13:34:06 s 1 -128732.65 9 +327883.06 4960.0 C57
2021-03-28 13:44:06 S 10 53 21.974 -37 06 18.61 V C57
2021-03-28 13:44:06 s 1 -129038.35 5 +327563.08 2720.0 C57
2021-03-28 13:54:05 S 10 53 22.102 -37 05 57.84 V C57
2021-03-28 13:54:05 s 1 -129343.62 3 +327242.01 9680.0 C57
2021-03-28 14:04:06 S 10 53 22.370 -37 05 39.01 V C57
2021-03-28 14:04:06 s 1 -129648.46 2 +326919.86 5840.0 C57
2021-03-28 14:14:06 S 10 53 22.608 -37 05 20.76 V C57
2021-03-28 14:14:06 s 1 -129952.86 9 +326596.63 1210.0 C57
2021-03-28 14:24:06 S 10 53 22.632 -37 04 59.38 V C57
2021-03-28 14:24:06 s 1 -130256.84 4 +326272.31 5770.0 C57
2021-03-28 14:34:06 S 10 53 22.829 -37 04 41.16 V C57
2021-03-28 14:34:06 s 1 -130560.38 4 +325946.92 9520.0 C57
2021-03-28 14:44:06 S 10 53 23.078 -37 04 21.29 V C57
2021-03-28 14:44:06 s 1 -130863.48 8 +325620.43 2470.0 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)