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
2021-03-08 17:54:05 s 1 +157726.00 0 +116292.09 780.0 C57
2021-03-08 18:04:05 S 10 29 32.021 -52 38 40.38 V C57
2021-03-08 18:04:05 s 1 +157770.25 5 +117199.35 7630.0 C57
2021-03-08 18:14:05 S 10 29 33.360 -52 38 21.70 V C57
2021-03-08 18:14:05 s 1 +157811.63 9 +118104.47 8690.0 C57
2021-03-08 18:24:05 S 10 29 34.781 -52 38 06.50 V C57
2021-03-08 18:24:05 s 1 +157850.17 6 +119007.46 3980.0 C57
2021-03-08 18:34:05 S 10 29 36.233 -52 37 53.40 V C57
2021-03-08 18:34:05 s 1 +157885.89 1 +119908.33 3570.0 C57
2021-03-08 18:44:05 S 10 29 37.572 -52 37 33.89 V C57
2021-03-08 18:44:05 s 1 +157918.80 5 +120807.06 7480.0 C57
2021-03-08 18:54:05 S 10 29 39.269 -52 37 20.39 V C57
2021-03-08 18:54:05 s 1 +157948.94 2 +121703.68 5780.0 C57
2021-03-08 19:04:05 S 10 29 40.901 -52 37 02.53 V C57
2021-03-08 19:04:05 s 1 +157976.32 5 +122598.17 8500.0 C57
2021-03-08 19:14:05 S 10 29 42.029 -52 36 43.60 V C57
2021-03-08 19:14:05 s 1 +158000.97 6 +123490.54 5690.0 C57
2021-03-08 19:24:05 S 10 29 43.037 -52 36 29.52 V C57
2021-03-08 19:24:05 s 1 +158022.91 8 +124380.79 7380.0 C57
2021-03-08 19:34:05 S 10 29 45.415 -52 36 15.62 V C57
2021-03-08 19:34:05 s 1 +158042.17 1 +125268.93 3630.0 C57
2021-03-08 19:44:05 S 10 29 46.812 -52 35 54.24 V C57
2021-03-08 19:44:05 s 1 +158058.75 9 +126154.95 4480.0 C57
2021-03-08 19:54:05 S 10 29 48.101 -52 35 35.99 V C57
2021-03-08 19:54:05 s 1 +158072.70 2 +127038.87 9960.0 C57
2021-03-08 20:04:05 S 10 29 49.651 -52 35 20.04 V C57
2021-03-08 20:04:05 s 1 +158084.02 1 +127920.68 120.0 C57
2021-03-08 20:14:05 S 10 29 50.856 -52 35 09.20 V C57
2021-03-08 20:14:05 s 1 +158092.73 9 +128800.38 5000.0 C57
2021-03-08 20:34:05 S 10 29 53.717 -52 34 34.46 V C57
2021-03-08 20:34:05 s 1 +158102.45 0 +130553.47 9080.0 C57
2021-03-08 20:44:05 S 10 29 55.730 -52 34 17.54 V C57
2021-03-08 20:44:05 s 1 +158103.48 5 +131426.87 8370.0 C57
2021-03-08 21:04:05 S 10 30 00.991 -52 33 59.15 V C57
2021-03-08 21:04:05 s 1 +158098.01 3 +133167.39 1620.0 C57
2021-03-08 21:24:05 S 10 30 01.010 -52 33 11.16 V C57
2021-03-08 21:24:05 s 1 +158082.61 8 +134899.55 4700.0 C57
2021-03-08 21:54:05 S 10 30 05.462 -52 32 25.55 V C57
2021-03-08 21:54:05 s 1 +158041.25 9 +137482.18 2170.0 C57
2021-03-08 22:04:05 S 10 30 06.787 -52 32 07.87 V C57
2021-03-08 22:04:05 s 1 +158022.67 8 +138338.90 1570.0 C57
2021-03-08 22:14:05 S 10 30 08.112 -52 31 54.34 V C57
2021-03-08 22:14:05 s 1 +158001.72 9 +139193.55 6150.0 C57
2021-03-08 22:24:05 S 10 30 09.418 -52 31 36.41 V C57
2021-03-08 22:24:05 s 1 +157978.43 3 +140046.13 5940.0 C57
2021-03-08 22:44:05 S 10 30 12.394 -52 31 02.86 V C57
2021-03-08 22:44:05 s 1 +157924.86 7 +141745.10 1330.0 C57
2021-03-08 23:04:05 S 10 30 15.240 -52 30 31.36 V C57
2021-03-08 23:04:05 s 1 +157862.12 3 +143435.84 8010.0 C57
2021-03-08 23:14:05 S 10 30 16.481 -52 30 13.75 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)