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 18:34:06 S 10 52 55.961 -37 43 04.40 V C57
2021-03-27 18:34:06 s 1 -91461.938 0 +357401.13 6620.0 C57
2021-03-27 18:44:06 S 10 52 56.266 -37 42 46.73 V C57
2021-03-27 18:44:06 s 1 -91806.748 0 +357201.28 6230.0 C57
2021-03-27 18:54:06 S 10 52 56.616 -37 42 28.73 V C57
2021-03-27 18:54:06 s 1 -92151.290 0 +357000.39 5360.0 C57
2021-03-27 19:04:06 S 10 52 56.736 -37 42 08.39 V C57
2021-03-27 19:04:06 s 1 -92495.562 0 +356798.47 4000.0 C57
2021-03-27 19:14:06 S 10 52 57.108 -37 41 49.31 V C57
2021-03-27 19:14:06 s 1 -92839.565 0 +356595.52 2150.0 C57
2021-03-27 19:24:06 S 10 52 57.247 -37 41 31.78 V C57
2021-03-27 19:24:06 s 1 -93183.295 0 +356391.54 9810.0 C57
2021-03-27 19:34:06 S 10 52 57.470 -37 41 12.52 V C57
2021-03-27 19:34:06 s 1 -93526.753 0 +356186.52 6980.0 C57
2021-03-27 19:44:06 S 10 52 57.754 -37 40 53.47 V C57
2021-03-27 19:44:06 s 1 -93869.937 0 +355980.47 3650.0 C57
2021-03-27 19:54:06 S 10 52 58.111 -37 40 34.75 V C57
2021-03-27 19:54:06 s 1 -94212.846 0 +355773.39 9810.0 C57
2021-03-27 20:04:06 S 10 52 58.406 -37 40 15.10 V C57
2021-03-27 20:04:06 s 1 -94555.478 0 +355565.27 5480.0 C57
2021-03-27 20:14:06 S 10 52 58.656 -37 39 56.27 V C57
2021-03-27 20:14:06 s 1 -94897.832 0 +355356.11 640.0 C57
2021-03-27 20:24:06 S 10 52 58.927 -37 39 36.40 V C57
2021-03-27 20:24:06 s 1 -95239.908 0 +355145.92 5300.0 C57
2021-03-27 20:34:06 S 10 52 59.191 -37 39 17.93 V C57
2021-03-27 20:34:06 s 1 -95581.703 0 +354934.70 9440.0 C57
2021-03-27 20:44:06 S 10 52 59.371 -37 38 58.81 V C57
2021-03-27 20:44:06 s 1 -95923.217 0 +354722.43 3080.0 C57
2021-03-27 20:54:06 S 10 52 59.659 -37 38 40.20 V C57
2021-03-27 20:54:06 s 1 -96264.448 0 +354509.14 6200.0 C57
2021-03-27 21:04:06 S 10 52 59.822 -37 38 21.01 V C57
2021-03-27 21:04:06 s 1 -96605.396 0 +354294.80 8810.0 C57
2021-03-27 21:14:06 S 10 53 00.091 -37 38 03.52 V C57
2021-03-27 21:14:06 s 1 -96946.058 0 +354079.43 890.0 C57
2021-03-27 21:34:06 S 10 53 01.022 -37 37 22.33 V C57
2021-03-27 21:34:06 s 1 -97626.522 0 +353645.58 3500.0 C57
2021-03-27 22:14:06 S 10 53 01.608 -37 36 06.59 V C57
2021-03-27 22:14:06 s 1 -98983.973 0 +352765.43 2390.0 C57
2021-03-27 22:34:06 S 10 53 02.030 -37 35 28.75 V C57
2021-03-27 22:34:06 s 1 -99660.939 0 +352319.11 8630.0 C57
2021-03-27 22:44:06 S 10 53 02.328 -37 35 11.18 V C57
2021-03-27 22:44:06 s 1 -99998.979 0 +352094.40 5940.0 C57
2021-03-27 22:54:06 S 10 53 02.318 -37 34 49.58 V C57
2021-03-27 22:54:06 s 1 -100336.72 0 +351868.65 2700.0 C57
2021-03-27 23:04:06 S 10 53 02.635 -37 34 29.71 V C57
2021-03-27 23:04:06 s 1 -100674.16 2 +351641.85 8930.0 C57
2021-03-27 23:14:06 S 10 53 02.849 -37 34 11.86 V C57
2021-03-27 23:14:06 s 1 -101011.30 4 +351414.02 4600.0 C57
2021-03-27 23:24:06 S 10 53 03.264 -37 33 53.03 V C57
2021-03-27 23:24:06 s 1 -101348.14 4 +351185.14 9720.0 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)