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
2021-01-28 23:24:07 S 07 33 34.250 -76 53 23.78 V C57
2021-01-28 23:24:07 s 1 +152394.14 0 +165180.96 6140.0 C57
2021-01-28 23:34:07 S 07 33 41.902 -76 53 24.68 V C57
2021-01-28 23:34:07 s 1 +152318.75 9 +165989.92 2830.0 C57
2021-01-28 23:44:07 S 07 33 49.368 -76 53 25.94 V C57
2021-01-28 23:44:07 s 1 +152241.50 7 +166796.83 6080.0 C57
2021-01-28 23:54:07 S 07 33 56.609 -76 53 26.77 V C57
2021-01-28 23:54:07 s 1 +152162.39 9 +167601.70 5920.0 C57
2021-01-29 00:04:07 S 07 34 04.366 -76 53 30.12 V C57
2021-01-29 00:04:07 s 1 +152081.44 9 +168404.54 2380.0 C57
2021-01-29 00:14:07 S 07 34 11.486 -76 53 28.90 V C57
2021-01-29 00:14:07 s 1 +151998.66 9 +169205.34 5470.0 C57
2021-01-29 00:24:07 S 07 34 19.735 -76 53 30.30 V C57
2021-01-29 00:24:07 s 1 +151914.07 5 +170004.12 5220.0 C57
2021-01-29 00:34:07 S 07 34 26.698 -76 53 33.14 V C57
2021-01-29 00:34:07 s 1 +151827.67 9 +170800.88 1660.0 C57
2021-01-29 00:44:07 S 07 34 33.842 -76 53 33.36 V C57
2021-01-29 00:44:07 s 1 +151739.49 5 +171595.63 4810.0 C57
2021-01-29 00:54:07 S 07 34 42.348 -76 53 35.16 V C57
2021-01-29 00:54:07 s 1 +151649.53 7 +172388.36 4700.0 C57
2021-01-29 01:04:07 S 07 34 49.589 -76 53 34.98 V C57
2021-01-29 01:04:07 s 1 +151557.81 7 +173179.08 1340.0 C57
2021-01-29 01:14:07 S 07 34 57.281 -76 53 37.39 V C57
2021-01-29 01:14:07 s 1 +151464.34 9 +173967.80 4770.0 C57
2021-01-29 01:24:07 S 07 35 04.289 -76 53 40.67 V C57
2021-01-29 01:24:07 s 1 +151369.14 5 +174754.53 5010.0 C57
2021-01-29 01:34:07 S 07 35 11.940 -76 53 39.26 V C57
2021-01-29 01:34:07 s 1 +151272.21 8 +175539.26 2080.0 C57
2021-01-29 01:44:07 S 07 35 19.886 -76 53 40.31 V C57
2021-01-29 01:44:07 s 1 +151173.58 1 +176321.99 6000.0 C57
2021-01-29 02:04:07 S 07 35 35.141 -76 53 43.26 V C57
2021-01-29 02:04:07 s 1 +150971.22 8 +177881.52 4490.0 C57
2021-01-29 02:24:07 S 07 35 50.616 -76 53 46.28 V C57
2021-01-29 02:24:07 s 1 +150762.18 3 +179433.14 670.0 C57
2021-01-29 02:34:07 S 07 35 56.784 -76 53 40.85 V C57
2021-01-29 02:34:07 s 1 +150655.18 1 +180206.00 9190.0 C57
2021-01-29 02:44:07 S 07 36 04.346 -76 53 42.90 V C57
2021-01-29 02:44:07 s 1 +150546.54 3 +180976.90 4710.0 C57
2021-01-29 03:04:07 S 07 36 18.526 -76 53 46.68 V C57
2021-01-29 03:04:07 s 1 +150324.40 5 +182512.82 6770.0 C57
2021-01-29 03:14:07 S 07 36 27.077 -76 53 45.85 V C57
2021-01-29 03:14:07 s 1 +150210.92 7 +183277.86 3370.0 C57
2021-01-29 03:24:07 S 07 36 33.864 -76 53 46.61 V C57
2021-01-29 03:24:07 s 1 +150095.86 0 +184040.95 7040.0 C57
2021-01-29 03:34:07 S 07 36 41.218 -76 53 49.38 V C57
2021-01-29 03:34:07 s 1 +149979.21 4 +184802.10 7810.0 C57
2021-01-29 03:44:07 S 07 36 49.013 -76 53 49.42 V C57
2021-01-29 03:44:07 s 1 +149861.00 1 +185561.31 5680.0 C57
2021-01-29 03:54:07 S 07 36 56.304 -76 53 49.63 V C57
2021-01-29 03:54:07 s 1 +149741.23 1 +186318.59 690.0 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)