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
2021-03-09 09:34:05 s 1 +151879.97 7 +192636.13 3830.0 C57
2021-03-09 09:54:05 S 10 31 38.777 -52 13 20.14 V C57
2021-03-09 09:54:05 s 1 +151581.56 7 +194074.41 5760.0 C57
2021-03-09 10:04:05 S 10 31 39.910 -52 13 08.00 V C57
2021-03-09 10:04:05 s 1 +151430.22 1 +194790.81 2280.0 C57
2021-03-09 10:14:05 S 10 31 41.177 -52 12 55.33 V C57
2021-03-09 10:14:05 s 1 +151277.45 9 +195505.40 5850.0 C57
2021-03-09 10:24:05 S 10 31 42.511 -52 12 37.87 V C57
2021-03-09 10:24:05 s 1 +151123.29 0 +196218.17 6490.0 C57
2021-03-09 10:34:05 S 10 31 43.680 -52 12 20.88 V C57
2021-03-09 10:34:05 s 1 +150967.72 5 +196929.13 4220.0 C57
2021-03-09 10:44:05 S 10 31 44.887 -52 12 02.30 V C57
2021-03-09 10:44:05 s 1 +150810.77 1 +197638.28 9070.0 C57
2021-03-09 10:54:05 S 10 31 45.869 -52 11 50.14 V C57
2021-03-09 10:54:05 s 1 +150652.43 9 +198345.62 1050.0 C57
2021-03-09 11:34:05 S 10 31 50.683 -52 10 50.88 V C57
2021-03-09 11:34:05 s 1 +150005.49 9 +201157.03 590.0 C57
2021-03-09 11:44:05 S 10 31 51.564 -52 10 29.71 V C57
2021-03-09 11:44:05 s 1 +149840.40 6 +201855.41 8480.0 C57
2021-03-09 11:54:05 S 10 31 52.879 -52 10 16.97 V C57
2021-03-09 11:54:05 s 1 +149673.98 6 +202552.00 3600.0 C57
2021-03-09 12:04:05 S 10 31 54.041 -52 10 00.98 V C57
2021-03-09 12:04:05 s 1 +149506.24 9 +203246.81 5970.0 C57
2021-03-09 12:14:05 S 10 31 55.217 -52 09 44.03 V C57
2021-03-09 12:14:05 s 1 +149337.20 3 +203939.84 5600.0 C57
2021-03-09 12:24:05 S 10 31 56.304 -52 09 30.31 V C57
2021-03-09 12:24:05 s 1 +149166.85 6 +204631.10 2520.0 C57
2021-03-09 12:34:05 S 10 31 57.514 -52 09 10.80 V C57
2021-03-09 12:34:05 s 1 +148995.21 6 +205320.59 6750.0 C57
2021-03-09 12:44:05 S 10 31 58.373 -52 08 57.05 V C57
2021-03-09 12:44:05 s 1 +148822.29 2 +206008.32 8280.0 C57
2021-03-09 12:54:05 S 10 31 59.921 -52 08 42.79 V C57
2021-03-09 12:54:05 s 1 +148648.09 3 +206694.28 7150.0 C57
2021-03-09 13:04:05 S 10 32 00.984 -52 08 27.89 V C57
2021-03-09 13:04:05 s 1 +148472.62 5 +207378.48 3380.0 C57
2021-03-09 13:14:05 S 10 32 01.670 -52 08 10.72 V C57
2021-03-09 13:14:05 s 1 +148295.89 8 +208060.92 6960.0 C57
2021-03-09 13:24:05 S 10 32 02.902 -52 07 57.76 V C57
2021-03-09 13:24:05 s 1 +148117.91 9 +208741.61 7930.0 C57
2021-03-09 13:34:05 S 10 32 04.277 -52 07 40.55 V C57
2021-03-09 13:34:05 s 1 +147938.69 6 +209420.55 6300.0 C57
2021-03-09 13:44:05 S 10 32 05.287 -52 07 23.38 V C57
2021-03-09 13:44:05 s 1 +147758.23 7 +210097.74 2070.0 C57
2021-03-09 13:54:05 S 10 32 05.899 -52 07 05.95 V C57
2021-03-09 13:54:05 s 1 +147576.55 0 +210773.19 5280.0 C57
2021-03-09 14:04:05 S 10 32 07.361 -52 06 56.41 V C57
2021-03-09 14:04:05 s 1 +147393.64 3 +211446.90 5930.0 C57
2021-03-09 14:14:05 S 10 32 08.770 -52 06 34.34 V C57
2021-03-09 14:14:05 s 1 +147209.52 2 +212118.87 4040.0 C57
2021-03-09 14:24:05 S 10 32 09.847 -52 06 21.28 V 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)