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
2021-01-23 20:14:07 S 05 21 29.122 -78 36 59.54 V C57
2021-01-23 20:14:07 s 1 -187004.04 4 +260724.03 9550.0 C57
2021-01-23 20:24:07 S 05 21 38.390 -78 36 49.75 V C57
2021-01-23 20:24:07 s 1 -187159.03 5 +260211.08 1320.0 C57
2021-01-23 20:34:07 S 05 21 47.897 -78 36 46.87 V C57
2021-01-23 20:34:07 s 1 -187313.22 1 +259697.02 1690.0 C57
2021-01-23 20:44:07 S 05 21 56.933 -78 36 39.82 V C57
2021-01-23 20:44:07 s 1 -187466.60 0 +259181.85 660.0 C57
2021-01-23 20:54:07 S 05 22 07.008 -78 36 35.28 V C57
2021-01-23 20:54:07 s 1 -187619.16 8 +258665.55 8220.0 C57
2021-01-23 21:04:07 S 05 22 16.507 -78 36 26.89 V C57
2021-01-23 21:04:07 s 1 -187770.92 1 +258148.14 4370.0 C57
2021-01-23 21:14:07 S 05 22 26.117 -78 36 18.58 V C57
2021-01-23 21:14:07 s 1 -187921.85 7 +257629.61 9110.0 C57
2021-01-23 21:24:07 S 05 22 34.680 -78 36 16.06 V C57
2021-01-23 21:24:07 s 1 -188071.97 3 +257109.96 2420.0 C57
2021-01-23 21:34:07 S 05 22 45.643 -78 36 06.12 V C57
2021-01-23 21:34:07 s 1 -188221.26 6 +256589.18 4300.0 C57
2021-01-23 21:44:07 S 05 22 54.958 -78 35 59.82 V C57
2021-01-23 21:44:07 s 1 -188369.73 1 +256067.28 4750.0 C57
2021-01-23 21:54:07 S 05 23 04.217 -78 35 53.45 V C57
2021-01-23 21:54:07 s 1 -188517.36 6 +255544.26 3760.0 C57
2021-01-23 22:04:07 S 05 23 13.678 -78 35 48.19 V C57
2021-01-23 22:04:07 s 1 -188664.16 9 +255020.11 1320.0 C57
2021-01-23 22:14:07 S 05 23 23.621 -78 35 39.66 V C57
2021-01-23 22:14:07 s 1 -188810.13 4 +254494.83 7430.0 C57
2021-01-23 22:24:07 S 05 23 32.314 -78 35 34.33 V C57
2021-01-23 22:24:07 s 1 -188955.26 0 +253968.43 2090.0 C57
2021-01-23 22:34:07 S 05 23 42.912 -78 35 28.14 V C57
2021-01-23 22:34:07 s 1 -189099.54 3 +253440.90 5280.0 C57
2021-01-23 22:44:07 S 05 23 52.685 -78 35 19.03 V C57
2021-01-23 22:44:07 s 1 -189242.97 9 +252912.23 7000.0 C57
2021-01-23 22:54:07 S 05 24 01.975 -78 35 13.63 V C57
2021-01-23 22:54:07 s 1 -189385.56 6 +252382.44 7250.0 C57
2021-01-23 23:04:07 S 05 24 11.314 -78 35 06.65 V C57
2021-01-23 23:04:07 s 1 -189527.29 9 +251851.51 6010.0 C57
2021-01-23 23:14:07 S 05 24 20.167 -78 35 00.17 V C57
2021-01-23 23:14:07 s 1 -189668.17 7 +251319.45 3290.0 C57
2021-01-23 23:24:07 S 05 24 29.791 -78 34 55.27 V C57
2021-01-23 23:24:07 s 1 -189808.19 4 +250786.26 9080.0 C57
2021-01-23 23:34:07 S 05 24 39.146 -78 34 45.98 V C57
2021-01-23 23:34:07 s 1 -189947.34 8 +250251.92 3360.0 C57
2021-01-23 23:44:07 S 05 24 48.878 -78 34 42.10 V C57
2021-01-23 23:44:07 s 1 -190085.63 6 +249716.45 6140.0 C57
2021-01-23 23:54:07 S 05 24 58.831 -78 34 32.99 V C57
2021-01-23 23:54:07 s 1 -190223.05 3 +249179.85 7410.0 C57
2021-01-24 00:04:07 S 05 25 07.930 -78 34 25.39 V C57
2021-01-24 00:04:07 s 1 -190359.59 8 +248642.10 7160.0 C57
2021-01-24 00:14:07 S 05 25 17.734 -78 34 20.50 V C57
2021-01-24 00:14:07 s 1 -190495.26 5 +248103.21 5390.0 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)