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
2021-03-28 14:54:06 S 10 53 23.237 -37 04 02.28 V C57
2021-03-28 14:54:06 s 1 -131166.15 4 +325292.87 4600.0 C57
2021-03-28 15:04:05 S 10 53 23.393 -37 03 41.90 V C57
2021-03-28 15:04:05 s 1 -131468.38 0 +324964.21 5920.0 C57
2021-03-28 15:14:06 S 10 53 23.722 -37 03 21.28 V C57
2021-03-28 15:14:06 s 1 -131770.16 5 +324634.47 6410.0 C57
2021-03-28 15:24:05 S 10 53 23.794 -37 03 03.46 V C57
2021-03-28 15:24:05 s 1 -132071.50 7 +324303.65 6080.0 C57
2021-03-28 15:34:06 S 10 53 23.916 -37 02 43.76 V C57
2021-03-28 15:34:06 s 1 -132372.40 5 +323971.74 4930.0 C57
2021-03-28 15:44:06 S 10 53 24.305 -37 02 23.78 V C57
2021-03-28 15:44:06 s 1 -132672.85 6 +323638.73 2950.0 C57
2021-03-28 15:54:06 S 10 53 24.228 -37 02 04.06 V C57
2021-03-28 15:54:06 s 1 -132972.85 9 +323304.65 130.0 C57
2021-03-28 16:04:06 S 10 53 24.557 -37 01 45.73 V C57
2021-03-28 16:04:06 s 1 -133272.41 2 +322969.47 6480.0 C57
2021-03-28 16:14:06 S 10 53 24.778 -37 01 27.08 V C57
2021-03-28 16:14:06 s 1 -133571.51 4 +322633.20 1990.0 C57
2021-03-28 16:24:06 S 10 53 24.936 -37 01 07.57 V C57
2021-03-28 16:24:06 s 1 -133870.16 2 +322295.84 6660.0 C57
2021-03-28 16:34:05 S 10 53 25.200 -37 00 46.08 V C57
2021-03-28 16:34:05 s 1 -134168.35 6 +321957.39 480.0 C57
2021-03-28 16:44:06 S 10 53 25.334 -37 00 28.55 V C57
2021-03-28 16:44:06 s 1 -134466.09 2 +321617.85 3450.0 C57
2021-03-28 16:54:05 S 10 53 25.457 -37 00 08.39 V C57
2021-03-28 16:54:05 s 1 -134763.37 0 +321277.21 5570.0 C57
2021-03-28 17:04:06 S 10 53 25.690 -36 59 48.70 V C57
2021-03-28 17:04:06 s 1 -135060.18 8 +320935.49 6830.0 C57
2021-03-28 17:14:06 S 10 53 25.872 -36 59 29.36 V C57
2021-03-28 17:14:06 s 1 -135356.54 4 +320592.66 7230.0 C57
2021-03-28 17:24:06 S 10 53 25.973 -36 59 08.59 V C57
2021-03-28 17:24:06 s 1 -135652.43 6 +320248.75 6770.0 C57
2021-03-28 17:34:06 S 10 53 26.009 -36 58 53.29 V C57
2021-03-28 17:34:06 s 1 -135947.86 3 +319903.74 5440.0 C57
2021-03-28 18:04:05 S 10 53 26.834 -36 57 50.72 V C57
2021-03-28 18:04:05 s 1 -136831.33 1 +318862.13 6230.0 C57
2021-03-28 18:14:06 S 10 53 27.017 -36 57 32.00 V C57
2021-03-28 18:14:06 s 1 -137124.87 7 +318512.74 1400.0 C57
2021-03-28 18:24:05 S 10 53 27.120 -36 57 12.71 V C57
2021-03-28 18:24:05 s 1 -137417.94 9 +318162.24 5690.0 C57
2021-03-28 18:34:06 S 10 53 27.319 -36 56 54.20 V C57
2021-03-28 18:34:06 s 1 -137710.54 5 +317810.65 9100.0 C57
2021-03-28 18:44:06 S 10 53 27.538 -36 56 33.43 V C57
2021-03-28 18:44:06 s 1 -138002.66 2 +317457.96 1610.0 C57
2021-03-28 18:54:06 S 10 53 27.552 -36 56 14.57 V C57
2021-03-28 18:54:06 s 1 -138294.29 9 +317104.16 3220.0 C57
2021-03-28 19:04:06 S 10 53 27.938 -36 55 53.98 V C57
2021-03-28 19:04:06 s 1 -138585.45 5 +316749.27 3940.0 C57
2021-03-28 19:14:06 S 10 53 28.044 -36 55 35.29 V C57
2021-03-28 19:14:06 s 1 -138876.12 7 +316393.27 3760.0 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)