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
2021-03-12 02:34:06 s 1 +36864.167 0 +360748.40 9760.0 C57
2021-03-12 02:44:06 S 10 36 47.688 -50 31 33.78 V C57
2021-03-12 02:44:06 s 1 +36499.153 0 +360935.61 7950.0 C57
2021-03-12 02:54:06 S 10 36 48.334 -50 31 12.86 V C57
2021-03-12 02:54:06 s 1 +36134.020 0 +361121.73 5810.0 C57
2021-03-12 03:04:06 S 10 36 48.874 -50 30 56.30 V C57
2021-03-12 03:04:06 s 1 +35768.771 0 +361306.75 3360.0 C57
2021-03-12 03:14:06 S 10 36 49.481 -50 30 42.95 V C57
2021-03-12 03:14:06 s 1 +35403.405 0 +361490.70 580.0 C57
2021-03-12 03:24:06 S 10 36 49.730 -50 30 24.59 V C57
2021-03-12 03:24:06 s 1 +35037.924 0 +361673.55 7490.0 C57
2021-03-12 03:34:06 S 10 36 50.153 -50 30 12.53 V C57
2021-03-12 03:34:06 s 1 +34672.330 0 +361855.32 4080.0 C57
2021-03-12 03:44:06 S 10 36 50.659 -50 29 53.12 V C57
2021-03-12 03:44:06 s 1 +34306.624 0 +362036.00 360.0 C57
2021-03-12 03:54:06 S 10 36 50.846 -50 29 36.24 V C57
2021-03-12 03:54:06 s 1 +33940.806 0 +362215.60 6320.0 C57
2021-03-12 04:04:06 S 10 36 51.358 -50 29 19.07 V C57
2021-03-12 04:04:06 s 1 +33574.878 0 +362394.11 1990.0 C57
2021-03-12 04:14:06 S 10 36 52.140 -50 29 06.07 V C57
2021-03-12 04:14:06 s 1 +33208.842 0 +362571.54 7340.0 C57
2021-03-12 04:24:06 S 10 36 52.896 -50 28 44.62 V C57
2021-03-12 04:24:06 s 1 +32842.698 0 +362747.89 2400.0 C57
2021-03-12 04:34:06 S 10 36 52.798 -50 28 32.77 V C57
2021-03-12 04:34:06 s 1 +32476.447 0 +362923.16 7150.0 C57
2021-03-12 04:54:06 S 10 36 53.693 -50 28 03.36 V C57
2021-03-12 04:54:06 s 1 +31743.631 0 +363270.45 5770.0 C57
2021-03-12 05:04:06 S 10 36 55.174 -50 27 39.64 V C57
2021-03-12 05:04:06 s 1 +31377.069 0 +363442.48 9640.0 C57
2021-03-12 05:24:06 S 10 36 55.615 -50 27 10.69 V C57
2021-03-12 05:24:06 s 1 +30643.639 0 +363783.29 6510.0 C57
2021-03-12 05:34:06 S 10 36 56.222 -50 26 53.74 V C57
2021-03-12 05:34:06 s 1 +30276.775 0 +363952.08 9520.0 C57
2021-03-12 05:44:06 S 10 36 56.520 -50 26 36.24 V C57
2021-03-12 05:44:06 s 1 +29909.812 0 +364119.80 2240.0 C57
2021-03-12 05:54:06 S 10 36 57.070 -50 26 21.73 V C57
2021-03-12 05:54:06 s 1 +29542.753 0 +364286.43 4690.0 C57
2021-03-12 06:04:06 S 10 36 57.518 -50 26 04.52 V C57
2021-03-12 06:04:06 s 1 +29175.597 0 +364452.00 6850.0 C57
2021-03-12 06:14:06 S 10 36 58.106 -50 25 50.23 V C57
2021-03-12 06:14:06 s 1 +28808.347 0 +364616.48 8750.0 C57
2021-03-12 06:24:06 S 10 36 58.601 -50 25 31.33 V C57
2021-03-12 06:24:06 s 1 +28441.004 0 +364779.90 360.0 C57
2021-03-12 06:34:06 S 10 36 58.634 -50 25 15.10 V C57
2021-03-12 06:34:06 s 1 +28073.568 0 +364942.24 1710.0 C57
2021-03-12 06:44:06 S 10 36 59.669 -50 25 01.20 V C57
2021-03-12 06:44:06 s 1 +27706.041 0 +365103.51 2790.0 C57
2021-03-12 06:54:06 S 10 36 59.731 -50 24 44.46 V C57
2021-03-12 06:54:06 s 1 +27338.424 0 +365263.70 3600.0 C57
2021-03-12 07:04:06 S 10 37 00.372 -50 24 26.53 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)