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
2021-03-17 01:24:06 s 1 -188390.35 7 +232826.72 8300.0 C57
2021-03-17 01:34:06 S 10 38 52.406 -46 54 10.04 V C57
2021-03-17 01:34:06 s 1 -188542.64 9 +232263.35 1170.0 C57
2021-03-17 01:44:06 S 10 38 52.159 -46 53 45.49 V C57
2021-03-17 01:44:06 s 1 -188693.96 0 +231698.76 2210.0 C57
2021-03-17 01:54:06 S 10 38 52.121 -46 53 27.89 V C57
2021-03-17 01:54:06 s 1 -188844.28 4 +231132.94 1380.0 C57
2021-03-17 02:04:06 S 10 38 52.274 -46 53 05.89 V C57
2021-03-17 02:04:06 s 1 -188993.61 7 +230565.89 8690.0 C57
2021-03-17 02:14:06 S 10 38 51.674 -46 52 43.61 V C57
2021-03-17 02:14:06 s 1 -189141.95 6 +229997.61 4120.0 C57
2021-03-17 02:24:06 S 10 38 52.032 -46 52 22.01 V C57
2021-03-17 02:24:06 s 1 -189289.29 5 +229428.09 7680.0 C57
2021-03-17 02:34:06 S 10 38 51.840 -46 52 00.70 V C57
2021-03-17 02:34:06 s 1 -189435.63 2 +228857.34 9340.0 C57
2021-03-17 02:44:06 S 10 38 51.799 -46 51 41.76 V C57
2021-03-17 02:44:06 s 1 -189580.96 1 +228285.35 9110.0 C57
2021-03-17 02:54:06 S 10 38 51.550 -46 51 17.71 V C57
2021-03-17 02:54:06 s 1 -189725.27 8 +227712.13 6970.0 C57
2021-03-17 03:04:06 S 10 38 51.694 -46 50 57.26 V C57
2021-03-17 03:04:06 s 1 -189868.57 9 +227137.66 2920.0 C57
2021-03-17 03:14:06 S 10 38 51.403 -46 50 38.72 V C57
2021-03-17 03:14:06 s 1 -190010.86 0 +226561.96 6950.0 C57
2021-03-17 03:24:06 S 10 38 51.240 -46 50 17.30 V C57
2021-03-17 03:24:06 s 1 -190152.11 6 +225985.02 9040.0 C57
2021-03-17 03:34:06 S 10 38 51.526 -46 49 52.21 V C57
2021-03-17 03:34:06 s 1 -190292.34 2 +225406.84 9200.0 C57
2021-03-17 03:44:06 S 10 38 51.084 -46 49 34.90 V C57
2021-03-17 03:44:06 s 1 -190431.53 6 +224827.41 7410.0 C57
2021-03-17 03:54:06 S 10 38 50.978 -46 49 09.26 V C57
2021-03-17 03:54:06 s 1 -190569.69 1 +224246.74 3660.0 C57
2021-03-17 04:04:06 S 10 38 50.674 -46 48 51.26 V C57
2021-03-17 04:04:06 s 1 -190706.80 4 +223664.83 7950.0 C57
2021-03-17 04:14:06 S 10 38 50.892 -46 48 23.33 V C57
2021-03-17 04:14:06 s 1 -190842.87 0 +223081.67 270.0 C57
2021-03-17 04:24:06 S 10 38 50.657 -46 48 11.38 V C57
2021-03-17 04:24:06 s 1 -190977.88 5 +222497.27 600.0 C57
2021-03-17 04:34:06 S 10 38 50.630 -46 47 47.22 V C57
2021-03-17 04:34:06 s 1 -191111.84 4 +221911.61 8950.0 C57
2021-03-17 04:44:06 S 10 38 50.743 -46 47 24.32 V C57
2021-03-17 04:44:06 s 1 -191244.74 2 +221324.71 5290.0 C57
2021-03-17 04:54:06 S 10 38 50.239 -46 47 02.51 V C57
2021-03-17 04:54:06 s 1 -191376.57 5 +220736.55 9630.0 C57
2021-03-17 05:04:06 S 10 38 50.558 -46 46 42.20 V C57
2021-03-17 05:04:06 s 1 -191507.33 9 +220147.15 1950.0 C57
2021-03-17 05:14:06 S 10 38 50.278 -46 46 21.54 V C57
2021-03-17 05:14:06 s 1 -191637.02 8 +219556.49 2250.0 C57
2021-03-17 05:24:06 S 10 38 49.954 -46 45 57.96 V C57
2021-03-17 05:24:06 s 1 -191765.63 9 +218964.58 510.0 C57
2021-03-17 05:34:06 S 10 38 50.266 -46 45 39.02 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)