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
2021-03-16 01:24:06 S 10 38 57.770 -47 43 15.56 V C57
2021-03-16 01:24:06 s 1 -157953.94 8 +301641.03 5790.0 C57
2021-03-16 01:34:06 S 10 38 58.051 -47 42 58.18 V C57
2021-03-16 01:34:06 s 1 -158213.66 1 +301244.28 9600.0 C57
2021-03-16 01:44:06 S 10 38 58.546 -47 42 36.54 V C57
2021-03-16 01:44:06 s 1 -158472.81 4 +300846.44 2360.0 C57
2021-03-16 01:54:06 S 10 38 58.303 -47 42 15.23 V C57
2021-03-16 01:54:06 s 1 -158731.40 4 +300447.49 4090.0 C57
2021-03-16 02:04:06 S 10 38 58.498 -47 41 56.83 V C57
2021-03-16 02:04:06 s 1 -158989.43 0 +300047.45 4770.0 C57
2021-03-16 02:14:06 S 10 38 58.560 -47 41 38.72 V C57
2021-03-16 02:14:06 s 1 -159246.88 8 +299646.31 4400.0 C57
2021-03-16 02:24:06 S 10 38 58.301 -47 41 16.15 V C57
2021-03-16 02:24:06 s 1 -159503.77 7 +299244.08 2970.0 C57
2021-03-16 02:34:06 S 10 38 58.265 -47 40 58.08 V C57
2021-03-16 02:34:06 s 1 -159760.09 5 +298840.74 490.0 C57
2021-03-16 02:44:06 S 10 38 58.147 -47 40 37.74 V C57
2021-03-16 02:44:06 s 1 -160015.84 0 +298436.30 6940.0 C57
2021-03-16 02:54:06 S 10 38 58.469 -47 40 19.67 V C57
2021-03-16 02:54:06 s 1 -160271.00 9 +298030.77 2320.0 C57
2021-03-16 03:04:06 S 10 38 58.454 -47 39 58.14 V C57
2021-03-16 03:04:06 s 1 -160525.60 0 +297624.13 6630.0 C57
2021-03-16 03:14:06 S 10 38 58.375 -47 39 33.34 V C57
2021-03-16 03:14:06 s 1 -160779.61 2 +297216.39 9870.0 C57
2021-03-16 03:24:06 S 10 38 58.099 -47 39 18.86 V C57
2021-03-16 03:24:06 s 1 -161033.04 2 +296807.54 2030.0 C57
2021-03-16 03:34:06 S 10 38 58.481 -47 38 59.42 V C57
2021-03-16 03:34:06 s 1 -161285.88 8 +296397.60 3100.0 C57
2021-03-16 03:44:06 S 10 38 58.488 -47 38 39.01 V C57
2021-03-16 03:44:06 s 1 -161538.14 7 +295986.54 3080.0 C57
2021-03-16 04:04:06 S 10 38 58.121 -47 37 59.56 V C57
2021-03-16 04:04:06 s 1 -162040.89 8 +295161.12 9770.0 C57
2021-03-16 04:14:06 S 10 38 58.162 -47 37 39.29 V C57
2021-03-16 04:14:06 s 1 -162291.38 6 +294746.76 6470.0 C57
2021-03-16 04:24:06 S 10 38 58.291 -47 37 20.64 V C57
2021-03-16 04:24:06 s 1 -162541.27 8 +294331.28 2060.0 C57
2021-03-16 04:34:06 S 10 38 58.308 -47 37 02.93 V C57
2021-03-16 04:34:06 s 1 -162790.57 4 +293914.69 6540.0 C57
2021-03-16 04:44:06 S 10 38 58.282 -47 36 40.50 V C57
2021-03-16 04:44:06 s 1 -163039.26 9 +293497.00 9910.0 C57
2021-03-16 04:54:06 S 10 38 58.346 -47 36 20.88 V C57
2021-03-16 04:54:06 s 1 -163287.36 3 +293078.19 2160.0 C57
2021-03-16 05:04:06 S 10 38 58.392 -47 35 59.89 V C57
2021-03-16 05:04:06 s 1 -163534.85 3 +292658.28 3290.0 C57
2021-03-16 05:14:06 S 10 38 58.457 -47 35 41.75 V C57
2021-03-16 05:14:06 s 1 -163781.73 7 +292237.25 3290.0 C57
2021-03-16 05:24:06 S 10 38 58.313 -47 35 22.78 V C57
2021-03-16 05:24:06 s 1 -164028.01 2 +291815.11 2160.0 C57
2021-03-16 05:34:06 S 10 38 58.392 -47 35 01.72 V C57
2021-03-16 05:34:06 s 1 -164273.67 7 +291391.86 9890.0 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)