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
2021-03-15 21:04:06 S 10 38 57.806 -47 51 43.96 V C57
2021-03-15 21:04:06 s 1 -151011.19 3 +311574.33 4990.0 C57
2021-03-15 21:14:06 S 10 38 58.128 -47 51 24.55 V C57
2021-03-15 21:14:06 s 1 -151284.78 2 +311205.82 4440.0 C57
2021-03-15 21:24:06 S 10 38 58.099 -47 51 04.28 V C57
2021-03-15 21:24:06 s 1 -151557.86 2 +310836.23 2960.0 C57
2021-03-15 21:34:06 S 10 38 58.092 -47 50 46.68 V C57
2021-03-15 21:34:06 s 1 -151830.43 0 +310465.56 530.0 C57
2021-03-15 21:44:06 S 10 38 57.938 -47 50 25.80 V C57
2021-03-15 21:44:06 s 1 -152102.48 5 +310093.82 7150.0 C57
2021-03-15 21:54:06 S 10 38 57.953 -47 50 06.40 V C57
2021-03-15 21:54:06 s 1 -152374.02 5 +309720.99 2830.0 C57
2021-03-15 22:04:06 S 10 38 58.310 -47 49 45.73 V C57
2021-03-15 22:04:06 s 1 -152645.04 8 +309347.08 7550.0 C57
2021-03-15 22:14:06 S 10 38 58.080 -47 49 27.52 V C57
2021-03-15 22:14:06 s 1 -152915.55 3 +308972.10 1310.0 C57
2021-03-15 22:24:06 S 10 38 57.914 -47 49 07.75 V C57
2021-03-15 22:24:06 s 1 -153185.53 6 +308596.03 4110.0 C57
2021-03-15 22:34:06 S 10 38 58.219 -47 48 48.10 V C57
2021-03-15 22:34:06 s 1 -153454.99 7 +308218.88 5950.0 C57
2021-03-15 22:44:06 S 10 38 58.214 -47 48 27.50 V C57
2021-03-15 22:44:06 s 1 -153723.93 3 +307840.64 6820.0 C57
2021-03-15 22:54:06 S 10 38 58.013 -47 48 10.62 V C57
2021-03-15 22:54:06 s 1 -153992.34 2 +307461.32 6710.0 C57
2021-03-15 23:04:06 S 10 38 57.852 -47 47 52.19 V C57
2021-03-15 23:04:06 s 1 -154260.22 3 +307080.92 5630.0 C57
2021-03-15 23:14:06 S 10 38 58.142 -47 47 28.82 V C57
2021-03-15 23:14:06 s 1 -154527.57 3 +306699.43 3560.0 C57
2021-03-15 23:24:06 S 10 38 58.001 -47 47 10.32 V C57
2021-03-15 23:24:06 s 1 -154794.39 1 +306316.86 520.0 C57
2021-03-15 23:34:06 S 10 38 58.274 -47 46 50.09 V C57
2021-03-15 23:34:06 s 1 -155060.67 4 +305933.20 6480.0 C57
2021-03-15 23:44:06 S 10 38 58.462 -47 46 32.99 V C57
2021-03-15 23:44:06 s 1 -155326.42 1 +305548.45 1450.0 C57
2021-03-15 23:54:06 S 10 38 58.534 -47 46 13.12 V C57
2021-03-15 23:54:06 s 1 -155591.63 0 +305162.62 5430.0 C57
2021-03-16 00:04:06 S 10 38 58.322 -47 45 51.70 V C57
2021-03-16 00:04:06 s 1 -155856.29 8 +304775.69 8410.0 C57
2021-03-16 00:14:06 S 10 38 58.118 -47 45 31.82 V C57
2021-03-16 00:14:06 s 1 -156120.42 4 +304387.68 390.0 C57
2021-03-16 00:24:06 S 10 38 58.409 -47 45 13.43 V C57
2021-03-16 00:24:06 s 1 -156384.00 5 +303998.58 1350.0 C57
2021-03-16 00:44:06 S 10 38 58.253 -47 44 33.86 V C57
2021-03-16 00:44:06 s 1 -156909.52 6 +303217.10 250.0 C57
2021-03-16 00:54:06 S 10 38 58.406 -47 44 14.93 V C57
2021-03-16 00:54:06 s 1 -157171.46 3 +302824.72 8170.0 C57
2021-03-16 01:04:06 S 10 38 58.411 -47 43 53.72 V C57
2021-03-16 01:04:06 s 1 -157432.84 6 +302431.25 5070.0 C57
2021-03-16 01:14:06 S 10 38 58.231 -47 43 38.60 V C57
2021-03-16 01:14:06 s 1 -157693.67 5 +302036.69 950.0 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)