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
2021-03-10 17:24:05 s 1 +105242.14 2 +300559.33 4640.0 C57
2021-03-10 17:34:05 S 10 34 42.228 -51 24 15.91 V C57
2021-03-10 17:34:05 s 1 +104931.15 0 +300983.69 350.0 C57
2021-03-10 18:34:05 S 10 34 46.910 -51 22 42.31 V C57
2021-03-10 18:34:05 s 1 +103055.47 1 +303502.03 2880.0 C57
2021-03-10 22:14:05 S 10 35 02.988 -51 16 55.45 V C57
2021-03-10 22:14:05 s 1 +96042.840 0 +312333.43 5680.0 C57
2021-03-10 22:34:05 S 10 35 04.704 -51 16 23.77 V C57
2021-03-10 22:34:05 s 1 +95395.378 0 +313105.31 9860.0 C57
2021-03-10 22:44:05 S 10 35 05.537 -51 16 11.57 V C57
2021-03-10 22:44:05 s 1 +95071.053 0 +313489.34 5600.0 C57
2021-03-10 22:54:05 S 10 35 06.334 -51 15 55.55 V C57
2021-03-10 22:54:05 s 1 +94746.337 0 +313872.09 460.0 C57
2021-03-10 23:04:05 S 10 35 06.806 -51 15 44.10 V C57
2021-03-10 23:04:05 s 1 +94421.231 0 +314253.56 4430.0 C57
2021-03-10 23:14:05 S 10 35 07.894 -51 15 25.88 V C57
2021-03-10 23:14:05 s 1 +94095.737 0 +314633.77 7530.0 C57
2021-03-10 23:24:05 S 10 35 08.371 -51 15 05.90 V C57
2021-03-10 23:24:05 s 1 +93769.857 0 +315012.70 9740.0 C57
2021-03-10 23:34:05 S 10 35 09.202 -51 14 55.18 V C57
2021-03-10 23:34:05 s 1 +93443.594 0 +315390.37 1090.0 C57
2021-03-10 23:44:05 S 10 35 09.866 -51 14 37.03 V C57
2021-03-10 23:44:05 s 1 +93116.950 0 +315766.77 1570.0 C57
2021-03-10 23:54:05 S 10 35 10.378 -51 14 23.46 V C57
2021-03-10 23:54:05 s 1 +92789.927 0 +316141.90 1180.0 C57
2021-03-11 00:04:05 S 10 35 11.232 -51 14 07.08 V C57
2021-03-11 00:04:05 s 1 +92462.528 0 +316515.77 9940.0 C57
2021-03-11 00:14:05 S 10 35 11.818 -51 13 51.13 V C57
2021-03-11 00:14:05 s 1 +92134.754 0 +316888.37 7850.0 C57
2021-03-11 00:24:05 S 10 35 12.624 -51 13 32.20 V C57
2021-03-11 00:24:05 s 1 +91806.607 0 +317259.72 4910.0 C57
2021-03-11 00:34:05 S 10 35 13.258 -51 13 18.01 V C57
2021-03-11 00:34:05 s 1 +91478.090 0 +317629.80 1120.0 C57
2021-03-11 00:44:05 S 10 35 14.258 -51 13 01.63 V C57
2021-03-11 00:44:05 s 1 +91149.205 0 +317998.63 6490.0 C57
2021-03-11 00:54:05 S 10 35 14.616 -51 12 48.17 V C57
2021-03-11 00:54:05 s 1 +90819.954 0 +318366.20 1030.0 C57
2021-03-11 01:14:05 S 10 35 16.229 -51 12 15.37 V C57
2021-03-11 01:14:05 s 1 +90160.362 0 +319097.57 7620.0 C57
2021-03-11 01:24:05 S 10 35 17.206 -51 12 00.18 V C57
2021-03-11 01:24:05 s 1 +89830.025 0 +319461.38 9670.0 C57
2021-03-11 01:34:05 S 10 35 17.587 -51 11 45.42 V C57
2021-03-11 01:34:05 s 1 +89499.331 0 +319823.93 910.0 C57
2021-03-11 01:44:05 S 10 35 18.442 -51 11 27.85 V C57
2021-03-11 01:44:05 s 1 +89168.282 0 +320185.24 1340.0 C57
2021-03-11 01:54:05 S 10 35 19.061 -51 11 13.70 V C57
2021-03-11 01:54:05 s 1 +88836.879 0 +320545.30 950.0 C57
2021-03-11 05:34:06 S 10 35 34.162 -51 05 27.28 V C57
2021-03-11 05:34:06 s 1 +81460.092 0 +328154.19 4870.0 C57
2021-03-11 05:54:06 S 10 35 35.450 -51 04 54.34 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)