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
2021-03-27 04:24:06 S 10 52 32.198 -38 09 52.78 V C57
2021-03-27 04:24:06 s 1 -61297.451 0 +370639.07 4960.0 C57
2021-03-27 05:34:06 S 10 52 34.238 -38 07 36.88 V C57
2021-03-27 05:34:06 s 1 -63837.395 0 +369827.64 7520.0 C57
2021-03-27 06:04:06 S 10 52 35.278 -38 06 42.98 V C57
2021-03-27 06:04:06 s 1 -64923.287 0 +369464.62 8270.0 C57
2021-03-27 06:14:06 S 10 52 35.030 -38 06 29.41 V C57
2021-03-27 06:14:06 s 1 -65284.889 0 +369341.58 7890.0 C57
2021-03-27 06:44:06 S 10 52 36.338 -38 05 26.27 V C57
2021-03-27 06:44:06 s 1 -66368.593 0 +368966.34 4800.0 C57
2021-03-27 06:54:06 S 10 52 36.499 -38 05 11.22 V C57
2021-03-27 06:54:06 s 1 -66729.458 0 +368839.22 3130.0 C57
2021-03-27 07:04:06 S 10 52 36.833 -38 04 50.41 V C57
2021-03-27 07:04:06 s 1 -67090.135 0 +368711.09 1120.0 C57
2021-03-27 07:14:06 S 10 52 37.313 -38 04 31.98 V C57
2021-03-27 07:14:06 s 1 -67450.624 0 +368581.94 8790.0 C57
2021-03-27 07:24:06 S 10 52 37.579 -38 04 14.12 V C57
2021-03-27 07:24:06 s 1 -67810.924 0 +368451.76 6120.0 C57
2021-03-27 07:34:06 S 10 52 37.762 -38 03 54.36 V C57
2021-03-27 07:34:06 s 1 -68171.034 0 +368320.57 3110.0 C57
2021-03-27 07:44:06 S 10 52 38.237 -38 03 36.14 V C57
2021-03-27 07:44:06 s 1 -68530.952 0 +368188.36 9770.0 C57
2021-03-27 07:54:06 S 10 52 38.532 -38 03 17.21 V C57
2021-03-27 07:54:06 s 1 -68890.678 0 +368055.13 6090.0 C57
2021-03-27 08:04:06 S 10 52 38.746 -38 02 58.92 V C57
2021-03-27 08:04:06 s 1 -69250.210 0 +367920.88 2070.0 C57
2021-03-27 08:14:06 S 10 52 38.890 -38 02 38.58 V C57
2021-03-27 08:14:06 s 1 -69609.548 0 +367785.62 7700.0 C57
2021-03-27 08:24:06 S 10 52 39.269 -38 02 21.59 V C57
2021-03-27 08:24:06 s 1 -69968.690 0 +367649.33 2990.0 C57
2021-03-27 08:34:06 S 10 52 39.691 -38 02 02.44 V C57
2021-03-27 08:34:06 s 1 -70327.635 0 +367512.02 7940.0 C57
2021-03-27 08:44:06 S 10 52 39.811 -38 01 42.31 V C57
2021-03-27 08:44:06 s 1 -70686.382 0 +367373.69 2530.0 C57
2021-03-27 08:54:06 S 10 52 40.195 -38 01 23.99 V C57
2021-03-27 08:54:06 s 1 -71044.930 0 +367234.35 6770.0 C57
2021-03-27 09:04:06 S 10 52 40.622 -38 01 05.88 V C57
2021-03-27 09:04:06 s 1 -71403.278 0 +367093.98 660.0 C57
2021-03-27 09:14:06 S 10 52 40.843 -38 00 46.51 V C57
2021-03-27 09:14:06 s 1 -71761.425 0 +366952.59 4190.0 C57
2021-03-27 09:24:06 S 10 52 40.975 -38 00 27.76 V C57
2021-03-27 09:24:06 s 1 -72119.370 0 +366810.18 7360.0 C57
2021-03-27 09:34:06 S 10 52 41.251 -38 00 09.14 V C57
2021-03-27 09:34:06 s 1 -72477.111 0 +366666.76 180.0 C57
2021-03-27 09:44:06 S 10 52 41.628 -37 59 50.86 V C57
2021-03-27 09:44:06 s 1 -72834.648 0 +366522.31 2630.0 C57
2021-03-27 09:54:06 S 10 52 41.880 -37 59 30.55 V C57
2021-03-27 09:54:06 s 1 -73191.979 0 +366376.84 4710.0 C57
2021-03-27 10:04:06 S 10 52 42.182 -37 59 12.80 V C57
2021-03-27 10:04:06 s 1 -73549.103 0 +366230.34 6430.0 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)