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
2021-03-23 22:04:06 S 10 48 50.760 -40 33 21.02 V C57
2021-03-23 22:04:06 s 1 +109896.46 7 +307595.04 4370.0 C57
2021-03-23 22:14:06 S 10 48 51.254 -40 33 02.45 V C57
2021-03-23 22:14:06 s 1 +109577.22 9 +307994.13 170.0 C57
2021-03-23 22:24:06 S 10 48 52.044 -40 32 44.41 V C57
2021-03-23 22:24:06 s 1 +109257.54 1 +308391.95 5020.0 C57
2021-03-23 22:34:06 S 10 48 52.822 -40 32 25.87 V C57
2021-03-23 22:34:06 s 1 +108937.40 7 +308788.49 8920.0 C57
2021-03-23 22:44:06 S 10 48 53.434 -40 32 07.30 V C57
2021-03-23 22:44:06 s 1 +108616.82 7 +309183.77 1890.0 C57
2021-03-23 22:54:06 S 10 48 54.235 -40 31 50.05 V C57
2021-03-23 22:54:06 s 1 +108295.80 5 +309577.79 3920.0 C57
2021-03-23 23:04:06 S 10 48 54.799 -40 31 31.94 V C57
2021-03-23 23:04:06 s 1 +107974.34 3 +309970.54 5020.0 C57
2021-03-23 23:14:06 S 10 48 55.442 -40 31 12.58 V C57
2021-03-23 23:14:06 s 1 +107652.44 3 +310362.03 5200.0 C57
2021-03-23 23:24:06 S 10 48 56.230 -40 30 55.76 V C57
2021-03-23 23:24:06 s 1 +107330.10 8 +310752.25 4460.0 C57
2021-03-23 23:34:06 S 10 48 56.863 -40 30 40.57 V C57
2021-03-23 23:34:06 s 1 +107007.33 9 +311141.22 2810.0 C57
2021-03-23 23:44:06 S 10 48 57.451 -40 30 20.41 V C57
2021-03-23 23:44:06 s 1 +106684.14 0 +311528.93 240.0 C57
2021-03-23 23:54:06 S 10 48 58.049 -40 29 59.68 V C57
2021-03-23 23:54:06 s 1 +106360.51 2 +311915.37 6770.0 C57
2021-03-24 00:04:06 S 10 48 58.670 -40 29 43.80 V C57
2021-03-24 00:04:06 s 1 +106036.45 8 +312300.57 2400.0 C57
2021-03-24 00:14:06 S 10 48 59.273 -40 29 23.96 V C57
2021-03-24 00:14:06 s 1 +105711.98 0 +312684.50 7140.0 C57
2021-03-24 00:24:06 S 10 48 59.933 -40 29 07.73 V C57
2021-03-24 00:24:06 s 1 +105387.08 1 +313067.19 980.0 C57
2021-03-24 00:54:06 S 10 49 02.004 -40 28 13.66 V C57
2021-03-24 00:54:06 s 1 +104409.87 5 +314207.73 7200.0 C57
2021-03-24 01:24:06 S 10 49 04.058 -40 27 18.79 V C57
2021-03-24 01:24:06 s 1 +103428.95 5 +315337.04 5550.0 C57
2021-03-24 01:44:06 S 10 49 05.270 -40 26 42.40 V C57
2021-03-24 01:44:06 s 1 +102772.97 5 +316083.69 150.0 C57
2021-03-24 01:54:06 S 10 49 05.952 -40 26 24.50 V C57
2021-03-24 01:54:06 s 1 +102444.38 1 +316455.15 6170.0 C57
2021-03-24 02:14:06 S 10 49 07.147 -40 25 49.19 V C57
2021-03-24 02:14:06 s 1 +101785.99 8 +317194.35 5670.0 C57
2021-03-24 02:44:06 S 10 49 09.341 -40 24 54.54 V C57
2021-03-24 02:44:06 s 1 +100795.46 4 +318293.86 3650.0 C57
2021-03-24 02:54:06 S 10 49 10.166 -40 24 34.52 V C57
2021-03-24 02:54:06 s 1 +100464.50 6 +318657.89 4650.0 C57
2021-03-24 03:04:06 S 10 49 10.550 -40 24 21.85 V C57
2021-03-24 03:04:06 s 1 +100133.16 2 +319020.69 4830.0 C57
2021-03-24 03:14:06 S 10 49 11.047 -40 23 59.75 V C57
2021-03-24 03:14:06 s 1 +99801.433 0 +319382.26 4190.0 C57
2021-03-24 03:44:06 S 10 49 12.751 -40 23 06.65 V C57
2021-03-24 03:44:06 s 1 +98803.960 0 +320459.59 7420.0 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)