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
2021-03-25 06:44:06 S 10 50 44.239 -39 34 11.82 V C57
2021-03-25 06:44:06 s 1 +41182.556 0 +362968.61 2610.0 C57
2021-03-25 06:54:06 S 10 50 44.652 -39 33 51.48 V C57
2021-03-25 06:54:06 s 1 +40811.019 0 +363139.44 4910.0 C57
2021-03-25 07:04:06 S 10 50 44.976 -39 33 35.21 V C57
2021-03-25 07:04:06 s 1 +40439.362 0 +363309.18 6930.0 C57
2021-03-25 07:14:06 S 10 50 45.432 -39 33 17.17 V C57
2021-03-25 07:14:06 s 1 +40067.588 0 +363477.84 8660.0 C57
2021-03-25 07:24:06 S 10 50 46.145 -39 32 58.34 V C57
2021-03-25 07:24:06 s 1 +39695.697 0 +363645.42 130.0 C57
2021-03-25 07:34:06 S 10 50 46.574 -39 32 41.06 V C57
2021-03-25 07:34:06 s 1 +39323.691 0 +363811.92 1320.0 C57
2021-03-25 07:44:06 S 10 50 47.112 -39 32 22.49 V C57
2021-03-25 07:44:06 s 1 +38951.571 0 +363977.34 2240.0 C57
2021-03-25 07:54:06 S 10 50 47.563 -39 32 03.70 V C57
2021-03-25 07:54:06 s 1 +38579.338 0 +364141.68 2890.0 C57
2021-03-25 08:04:06 S 10 50 47.885 -39 31 43.82 V C57
2021-03-25 08:04:06 s 1 +38206.993 0 +364304.93 3280.0 C57
2021-03-25 08:14:06 S 10 50 48.434 -39 31 26.80 V C57
2021-03-25 08:14:06 s 1 +37834.537 0 +364467.11 3410.0 C57
2021-03-25 08:24:06 S 10 50 48.914 -39 31 09.08 V C57
2021-03-25 08:24:06 s 1 +37461.973 0 +364628.21 3270.0 C57
2021-03-25 08:34:06 S 10 50 49.548 -39 30 51.59 V C57
2021-03-25 08:34:06 s 1 +37089.300 0 +364788.23 2880.0 C57
2021-03-25 08:44:06 S 10 50 49.850 -39 30 32.72 V C57
2021-03-25 08:44:06 s 1 +36716.520 0 +364947.17 2230.0 C57
2021-03-25 08:54:06 S 10 50 50.410 -39 30 14.36 V C57
2021-03-25 08:54:06 s 1 +36343.635 0 +365105.03 1330.0 C57
2021-03-25 09:04:06 S 10 50 50.885 -39 29 55.97 V C57
2021-03-25 09:04:06 s 1 +35970.645 0 +365261.82 180.0 C57
2021-03-25 09:14:06 S 10 50 51.686 -39 29 34.37 V C57
2021-03-25 09:14:06 s 1 +35597.552 0 +365417.53 8780.0 C57
2021-03-25 09:24:06 S 10 50 52.022 -39 29 18.42 V C57
2021-03-25 09:24:06 s 1 +35224.357 0 +365572.17 7140.0 C57
2021-03-25 09:34:06 S 10 50 52.433 -39 29 02.04 V C57
2021-03-25 09:34:06 s 1 +34851.061 0 +365725.73 5250.0 C57
2021-03-25 09:44:06 S 10 50 52.742 -39 28 41.12 V C57
2021-03-25 09:44:06 s 1 +34477.666 0 +365878.21 3120.0 C57
2021-03-25 09:54:06 S 10 50 53.246 -39 28 25.07 V C57
2021-03-25 09:54:06 s 1 +34104.172 0 +366029.62 760.0 C57
2021-03-25 10:04:06 S 10 50 53.702 -39 28 07.25 V C57
2021-03-25 10:04:06 s 1 +33730.581 0 +366179.96 8150.0 C57
2021-03-25 10:14:06 S 10 50 54.290 -39 27 48.64 V C57
2021-03-25 10:14:06 s 1 +33356.894 0 +366329.23 5320.0 C57
2021-03-25 10:24:06 S 10 50 54.876 -39 27 30.96 V C57
2021-03-25 10:24:06 s 1 +32983.112 0 +366477.42 2250.0 C57
2021-03-25 10:44:06 S 10 50 55.673 -39 26 53.27 V C57
2021-03-25 10:44:06 s 1 +32235.267 0 +366770.59 5440.0 C57
2021-03-25 10:54:06 S 10 50 56.177 -39 26 33.68 V C57
2021-03-25 10:54:06 s 1 +31861.208 0 +366915.57 1690.0 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)