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
2021-03-21 21:14:06 S 10 44 34.022 -42 03 01.26 V C57
2021-03-21 21:14:06 s 1 +167980.42 1 +128288.94 1080.0 C57
2021-03-21 21:24:06 S 10 44 35.057 -42 02 42.79 V C57
2021-03-21 21:24:06 s 1 +167991.32 8 +129143.79 4340.0 C57
2021-03-21 21:34:06 S 10 44 36.101 -42 02 22.34 V C57
2021-03-21 21:34:06 s 1 +167999.79 0 +129996.76 2760.0 C57
2021-03-21 21:44:06 S 10 44 37.229 -42 02 04.81 V C57
2021-03-21 21:44:06 s 1 +168005.82 3 +130847.86 6380.0 C57
2021-03-21 21:54:06 S 10 44 38.549 -42 01 44.44 V C57
2021-03-21 21:54:06 s 1 +168009.44 5 +131697.07 5240.0 C57
2021-03-21 22:14:06 S 10 44 40.598 -42 01 06.42 V C57
2021-03-21 22:14:06 s 1 +168009.52 7 +133389.86 8780.0 C57
2021-03-21 22:24:06 S 10 44 41.621 -42 00 46.30 V C57
2021-03-21 22:24:06 s 1 +168006.02 1 +134233.44 3520.0 C57
2021-03-21 22:34:06 S 10 44 42.938 -42 00 29.12 V C57
2021-03-21 22:34:06 s 1 +168000.17 2 +135075.14 3640.0 C57
2021-03-21 22:44:06 S 10 44 43.982 -42 00 07.92 V C57
2021-03-21 22:44:06 s 1 +167991.99 7 +135914.98 9150.0 C57
2021-03-21 22:54:06 S 10 44 45.029 -41 59 48.08 V C57
2021-03-21 22:54:06 s 1 +167981.51 4 +136752.94 80.0 C57
2021-03-21 23:04:06 S 10 44 46.270 -41 59 30.37 V C57
2021-03-21 23:04:06 s 1 +167968.73 7 +137589.04 6470.0 C57
2021-03-21 23:14:06 S 10 44 47.222 -41 59 08.20 V C57
2021-03-21 23:14:06 s 1 +167953.68 3 +138423.27 8360.0 C57
2021-03-21 23:24:06 S 10 44 48.427 -41 58 50.63 V C57
2021-03-21 23:24:06 s 1 +167936.36 9 +139255.63 5760.0 C57
2021-03-21 23:44:06 S 10 44 50.846 -41 58 14.99 V C57
2021-03-21 23:44:06 s 1 +167895.02 1 +140914.76 7250.0 C57
2021-03-21 23:54:06 S 10 44 52.010 -41 57 53.96 V C57
2021-03-21 23:54:06 s 1 +167871.01 9 +141741.54 1400.0 C57
2021-03-22 00:14:06 S 10 44 53.986 -41 57 16.20 V C57
2021-03-22 00:14:06 s 1 +167816.43 6 +143389.52 6650.0 C57
2021-03-22 00:24:06 S 10 44 55.111 -41 57 00.14 V C57
2021-03-22 00:24:06 s 1 +167785.88 5 +144210.72 7810.0 C57
2021-03-22 00:34:06 S 10 44 56.186 -41 56 40.06 V C57
2021-03-22 00:34:06 s 1 +167753.18 2 +145030.08 4700.0 C57
2021-03-22 00:44:06 S 10 44 57.103 -41 56 19.86 V C57
2021-03-22 00:44:06 s 1 +167718.34 1 +145847.58 7350.0 C57
2021-03-22 00:54:06 S 10 44 58.471 -41 56 00.49 V C57
2021-03-22 00:54:06 s 1 +167681.37 7 +146663.23 5790.0 C57
2021-03-22 01:04:06 S 10 44 59.580 -41 55 41.81 V C57
2021-03-22 01:04:06 s 1 +167642.30 4 +147477.04 30.0 C57
2021-03-22 01:14:06 S 10 45 00.619 -41 55 20.82 V C57
2021-03-22 01:14:06 s 1 +167601.13 8 +148289.01 120.0 C57
2021-03-22 01:24:06 S 10 45 01.582 -41 55 02.60 V C57
2021-03-22 01:24:06 s 1 +167557.89 2 +149099.13 6080.0 C57
2021-03-22 01:34:06 S 10 45 02.722 -41 54 46.26 V C57
2021-03-22 01:34:06 s 1 +167512.58 0 +149907.41 7940.0 C57
2021-03-22 01:44:06 S 10 45 03.751 -41 54 24.95 V C57
2021-03-22 01:44:06 s 1 +167465.21 7 +150713.85 5720.0 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)