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
2021-03-13 23:44:06 S 10 38 24.300 -49 15 28.48 V C57
2021-03-13 23:44:06 s 1 -62850.893 0 +373386.63 5690.0 C57
2021-03-13 23:54:06 S 10 38 24.686 -49 15 10.51 V C57
2021-03-13 23:54:06 s 1 -63209.553 0 +373295.88 5850.0 C57
2021-03-14 00:04:06 S 10 38 24.439 -49 14 54.42 V C57
2021-03-14 00:04:06 s 1 -63568.057 0 +373204.14 5770.0 C57
2021-03-14 00:14:06 S 10 38 25.018 -49 14 35.84 V C57
2021-03-14 00:14:06 s 1 -63926.403 0 +373111.41 5450.0 C57
2021-03-14 00:24:06 S 10 38 25.178 -49 14 17.45 V C57
2021-03-14 00:24:06 s 1 -64284.591 0 +373017.68 4870.0 C57
2021-03-14 00:34:06 S 10 38 25.375 -49 13 58.84 V C57
2021-03-14 00:34:06 s 1 -64642.619 0 +372922.96 4060.0 C57
2021-03-14 00:44:06 S 10 38 25.351 -49 13 44.15 V C57
2021-03-14 00:44:06 s 1 -65000.488 0 +372827.24 2990.0 C57
2021-03-14 00:54:06 S 10 38 25.404 -49 13 25.50 V C57
2021-03-14 00:54:06 s 1 -65358.195 0 +372730.53 1660.0 C57
2021-03-14 01:04:06 S 10 38 26.064 -49 13 05.74 V C57
2021-03-14 01:04:06 s 1 -65715.740 0 +372632.82 90.0 C57
2021-03-14 01:14:06 S 10 38 26.578 -49 12 52.45 V C57
2021-03-14 01:14:06 s 1 -66073.121 0 +372534.12 8260.0 C57
2021-03-14 01:24:06 S 10 38 26.318 -49 12 29.70 V C57
2021-03-14 01:24:06 s 1 -66430.339 0 +372434.42 6170.0 C57
2021-03-14 01:34:06 S 10 38 26.510 -49 12 14.08 V C57
2021-03-14 01:34:06 s 1 -66787.391 0 +372333.73 3810.0 C57
2021-03-14 01:54:06 S 10 38 27.120 -49 11 38.62 V C57
2021-03-14 01:54:06 s 1 -67500.996 0 +372129.37 8320.0 C57
2021-03-14 02:04:06 S 10 38 27.290 -49 11 20.83 V C57
2021-03-14 02:04:06 s 1 -67857.547 0 +372025.69 5180.0 C57
2021-03-14 02:14:06 S 10 38 27.787 -49 11 03.77 V C57
2021-03-14 02:14:06 s 1 -68213.928 0 +371921.02 1770.0 C57
2021-03-14 02:24:06 S 10 38 27.922 -49 10 43.82 V C57
2021-03-14 02:24:06 s 1 -68570.140 0 +371815.36 8080.0 C57
2021-03-14 02:34:06 S 10 38 28.392 -49 10 25.25 V C57
2021-03-14 02:34:06 s 1 -68926.180 0 +371708.70 4130.0 C57
2021-03-14 02:44:06 S 10 38 28.181 -49 10 10.31 V C57
2021-03-14 02:44:06 s 1 -69282.048 0 +371601.05 9900.0 C57
2021-03-14 02:54:06 S 10 38 28.550 -49 09 51.59 V C57
2021-03-14 02:54:06 s 1 -69637.743 0 +371492.40 5390.0 C57
2021-03-14 03:04:06 S 10 38 28.716 -49 09 34.92 V C57
2021-03-14 03:04:06 s 1 -69993.263 0 +371382.76 610.0 C57
2021-03-14 03:14:06 S 10 38 28.922 -49 09 15.12 V C57
2021-03-14 03:14:06 s 1 -70348.609 0 +371272.12 5540.0 C57
2021-03-14 03:24:06 S 10 38 29.119 -49 09 00.07 V C57
2021-03-14 03:24:06 s 1 -70703.778 0 +371160.49 190.0 C57
2021-03-14 03:34:06 S 10 38 29.107 -49 08 41.39 V C57
2021-03-14 03:34:06 s 1 -71058.771 0 +371047.87 4560.0 C57
2021-03-14 03:44:06 S 10 38 29.765 -49 08 22.31 V C57
2021-03-14 03:44:06 s 1 -71413.585 0 +370934.25 8640.0 C57
2021-03-14 03:54:06 S 10 38 29.832 -49 08 06.14 V C57
2021-03-14 03:54:06 s 1 -71768.219 0 +370819.63 2440.0 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)