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
2021-03-14 04:04:06 S 10 38 30.103 -49 07 47.35 V C57
2021-03-14 04:04:06 s 1 -72122.674 0 +370704.02 5940.0 C57
2021-03-14 04:14:06 S 10 38 30.250 -49 07 29.06 V C57
2021-03-14 04:14:06 s 1 -72476.947 0 +370587.41 9150.0 C57
2021-03-14 04:24:06 S 10 38 30.451 -49 07 13.51 V C57
2021-03-14 04:24:06 s 1 -72831.039 0 +370469.81 2060.0 C57
2021-03-14 04:34:06 S 10 38 30.667 -49 06 56.02 V C57
2021-03-14 04:34:06 s 1 -73184.947 0 +370351.22 4680.0 C57
2021-03-14 04:44:06 S 10 38 31.135 -49 06 35.89 V C57
2021-03-14 04:44:06 s 1 -73538.670 0 +370231.62 7000.0 C57
2021-03-14 04:54:06 S 10 38 31.166 -49 06 18.72 V C57
2021-03-14 04:54:06 s 1 -73892.209 0 +370111.04 9020.0 C57
2021-03-14 05:04:06 S 10 38 31.308 -49 05 59.46 V C57
2021-03-14 05:04:06 s 1 -74245.561 0 +369989.46 730.0 C57
2021-03-14 05:14:06 S 10 38 31.721 -49 05 43.76 V C57
2021-03-14 05:14:06 s 1 -74598.726 0 +369866.88 2140.0 C57
2021-03-14 05:24:06 S 10 38 31.603 -49 05 25.51 V C57
2021-03-14 05:24:06 s 1 -74951.703 0 +369743.31 3250.0 C57
2021-03-14 05:34:06 S 10 38 31.896 -49 05 07.80 V C57
2021-03-14 05:34:06 s 1 -75304.490 0 +369618.74 4040.0 C57
2021-03-14 05:44:06 S 10 38 32.184 -49 04 50.23 V C57
2021-03-14 05:44:06 s 1 -75657.087 0 +369493.18 4520.0 C57
2021-03-14 05:54:06 S 10 38 32.458 -49 04 33.64 V C57
2021-03-14 05:54:06 s 1 -76009.493 0 +369366.62 4690.0 C57
2021-03-14 06:04:06 S 10 38 32.686 -49 04 15.06 V C57
2021-03-14 06:04:06 s 1 -76361.706 0 +369239.07 4550.0 C57
2021-03-14 06:14:06 S 10 38 32.546 -49 03 59.36 V C57
2021-03-14 06:14:06 s 1 -76713.726 0 +369110.52 4080.0 C57
2021-03-14 06:24:06 S 10 38 32.508 -49 03 37.66 V C57
2021-03-14 06:24:06 s 1 -77065.551 0 +368980.97 3300.0 C57
2021-03-14 06:34:06 S 10 38 33.062 -49 03 21.67 V C57
2021-03-14 06:34:06 s 1 -77417.181 0 +368850.43 2200.0 C57
2021-03-14 06:44:06 S 10 38 33.370 -49 03 03.49 V C57
2021-03-14 06:44:06 s 1 -77768.615 0 +368718.89 770.0 C57
2021-03-14 06:54:06 S 10 38 33.526 -49 02 44.34 V C57
2021-03-14 06:54:06 s 1 -78119.850 0 +368586.36 9020.0 C57
2021-03-14 07:04:06 S 10 38 33.590 -49 02 28.72 V C57
2021-03-14 07:04:06 s 1 -78470.888 0 +368452.83 6940.0 C57
2021-03-14 07:14:06 S 10 38 33.881 -49 02 06.68 V C57
2021-03-14 07:14:06 s 1 -78821.726 0 +368318.31 4530.0 C57
2021-03-14 07:24:06 S 10 38 34.022 -49 01 54.52 V C57
2021-03-14 07:24:06 s 1 -79172.363 0 +368182.78 1790.0 C57
2021-03-14 07:34:06 S 10 38 34.171 -49 01 35.26 V C57
2021-03-14 07:34:06 s 1 -79522.798 0 +368046.27 8710.0 C57
2021-03-14 07:44:06 S 10 38 34.255 -49 01 15.24 V C57
2021-03-14 07:44:06 s 1 -79873.031 0 +367908.75 5300.0 C57
2021-03-14 08:14:06 S 10 38 34.846 -49 00 19.44 V C57
2021-03-14 08:14:06 s 1 -80922.503 0 +367490.23 3020.0 C57
2021-03-14 08:24:06 S 10 38 35.134 -49 00 04.68 V C57
2021-03-14 08:24:06 s 1 -81271.915 0 +367348.73 8250.0 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)