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
2021-01-29 19:54:07 S 07 47 51.785 -76 52 41.66 V C57
2021-01-29 19:54:07 s 1 +132376.58 1 +250641.95 8090.0 C57
2021-01-29 20:04:07 S 07 47 57.958 -76 52 38.89 V C57
2021-01-29 20:04:07 s 1 +132146.27 5 +251230.64 8430.0 C57
2021-01-29 20:24:07 S 07 48 11.256 -76 52 33.78 V C57
2021-01-29 20:24:07 s 1 +131683.20 1 +252403.32 4540.0 C57
2021-01-29 20:34:07 S 07 48 16.313 -76 52 36.08 V C57
2021-01-29 20:34:07 s 1 +131450.44 3 +252987.32 310.0 C57
2021-01-29 20:44:07 S 07 48 24.182 -76 52 36.26 V C57
2021-01-29 20:44:07 s 1 +131216.87 8 +253569.75 4580.0 C57
2021-01-29 21:04:07 S 07 48 35.957 -76 52 25.86 V C57
2021-01-29 21:04:07 s 1 +130747.34 3 +254729.97 8630.0 C57
2021-01-29 21:14:07 S 07 48 42.509 -76 52 23.05 V C57
2021-01-29 21:14:07 s 1 +130511.38 4 +255307.76 8430.0 C57
2021-01-29 21:24:07 S 07 48 49.116 -76 52 26.72 V C57
2021-01-29 21:24:07 s 1 +130274.63 7 +255883.99 6760.0 C57
2021-01-29 21:34:07 S 07 48 54.890 -76 52 21.76 V C57
2021-01-29 21:34:07 s 1 +130037.10 6 +256458.69 3630.0 C57
2021-01-29 21:44:07 S 07 49 01.922 -76 52 17.40 V C57
2021-01-29 21:44:07 s 1 +129798.79 6 +257031.84 9040.0 C57
2021-01-29 21:54:07 S 07 49 07.630 -76 52 14.45 V C57
2021-01-29 21:54:07 s 1 +129559.71 1 +257603.46 3000.0 C57
2021-01-29 22:14:07 S 07 49 20.760 -76 52 13.33 V C57
2021-01-29 22:14:07 s 1 +129079.23 8 +258742.10 6630.0 C57
2021-01-29 22:24:07 S 07 49 26.657 -76 52 10.13 V C57
2021-01-29 22:24:07 s 1 +128837.85 8 +259309.13 6310.0 C57
2021-01-29 22:34:07 S 07 49 33.535 -76 52 05.12 V C57
2021-01-29 22:34:07 s 1 +128595.72 2 +259874.63 4570.0 C57
2021-01-29 22:44:07 S 07 49 39.331 -76 52 04.55 V C57
2021-01-29 22:44:07 s 1 +128352.83 4 +260438.60 1430.0 C57
2021-01-29 22:54:07 S 07 49 45.420 -76 52 01.70 V C57
2021-01-29 22:54:07 s 1 +128109.19 9 +261001.06 6890.0 C57
2021-01-29 23:04:07 S 07 49 52.150 -76 51 59.65 V C57
2021-01-29 23:04:07 s 1 +127864.82 1 +261562.00 960.0 C57
2021-01-29 23:14:07 S 07 49 58.260 -76 51 58.03 V C57
2021-01-29 23:14:07 s 1 +127619.70 5 +262121.43 3650.0 C57
2021-01-29 23:24:07 S 07 50 04.553 -76 51 54.40 V C57
2021-01-29 23:24:07 s 1 +127373.85 5 +262679.34 4970.0 C57
2021-01-29 23:34:07 S 07 50 10.543 -76 51 53.78 V C57
2021-01-29 23:34:07 s 1 +127127.27 5 +263235.75 4920.0 C57
2021-01-29 23:44:07 S 07 50 16.433 -76 51 52.13 V C57
2021-01-29 23:44:07 s 1 +126879.97 0 +263790.65 3520.0 C57
2021-01-29 23:54:07 S 07 50 23.208 -76 51 47.27 V C57
2021-01-29 23:54:07 s 1 +126631.94 4 +264344.05 760.0 C57
2021-01-30 00:04:07 S 07 50 29.383 -76 51 45.00 V C57
2021-01-30 00:04:07 s 1 +126383.20 1 +264895.95 6670.0 C57
2021-01-30 00:14:07 S 07 50 35.390 -76 51 43.45 V C57
2021-01-30 00:14:07 s 1 +126133.74 5 +265446.35 1240.0 C57
2021-01-30 00:24:07 S 07 50 41.844 -76 51 40.21 V C57
2021-01-30 00:24:07 s 1 +125883.58 0 +265995.25 4480.0 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)