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
2021-03-30 10:54:05 S 10 53 55.474 -35 35 46.10 V C57
2021-03-30 10:54:05 s 1 -188785.78 9 +198335.63 8590.0 C57
2021-03-30 11:04:05 S 10 53 55.627 -35 35 25.30 V C57
2021-03-30 11:04:05 s 1 -188883.31 0 +197689.23 2940.0 C57
2021-03-30 11:14:05 S 10 53 55.610 -35 35 02.65 V C57
2021-03-30 11:14:05 s 1 -188979.53 4 +197041.47 4810.0 C57
2021-03-30 11:24:05 S 10 53 55.567 -35 34 42.13 V C57
2021-03-30 11:24:05 s 1 -189074.45 5 +196392.35 4190.0 C57
2021-03-30 11:34:05 S 10 53 55.728 -35 34 20.60 V C57
2021-03-30 11:34:05 s 1 -189168.06 6 +195741.87 1070.0 C57
2021-03-30 11:44:05 S 10 53 55.666 -35 33 59.40 V C57
2021-03-30 11:44:05 s 1 -189260.36 2 +195090.02 5440.0 C57
2021-03-30 11:54:05 S 10 53 55.709 -35 33 40.72 V C57
2021-03-30 11:54:05 s 1 -189351.33 6 +194436.81 7270.0 C57
2021-03-30 12:04:05 S 10 53 55.642 -35 33 18.40 V C57
2021-03-30 12:04:05 s 1 -189440.98 2 +193782.24 6570.0 C57
2021-03-30 12:14:05 S 10 53 55.766 -35 32 57.95 V C57
2021-03-30 12:14:05 s 1 -189529.29 2 +193126.30 3320.0 C57
2021-03-30 12:24:05 S 10 53 55.903 -35 32 35.52 V C57
2021-03-30 12:24:05 s 1 -189616.26 2 +192468.99 7500.0 C57
2021-03-30 12:34:05 S 10 53 55.889 -35 32 14.82 V C57
2021-03-30 12:34:05 s 1 -189701.88 3 +191810.31 9100.0 C57
2021-03-30 12:44:05 S 10 53 56.146 -35 31 57.86 V C57
2021-03-30 12:44:05 s 1 -189786.15 0 +191150.26 8120.0 C57
2021-03-30 13:24:05 S 10 53 56.232 -35 30 30.96 V C57
2021-03-30 13:24:05 s 1 -190109.54 2 +188496.32 8020.0 C57
2021-03-30 13:34:05 S 10 53 56.424 -35 30 08.24 V C57
2021-03-30 13:34:05 s 1 -190186.93 7 +187829.40 3890.0 C57
2021-03-30 13:44:05 S 10 53 56.290 -35 29 48.52 V C57
2021-03-30 13:44:05 s 1 -190262.93 7 +187161.09 7090.0 C57
2021-03-30 13:54:05 S 10 53 56.434 -35 29 27.74 V C57
2021-03-30 13:54:05 s 1 -190337.53 6 +186491.41 7600.0 C57
2021-03-30 14:04:05 S 10 53 56.434 -35 29 07.66 V C57
2021-03-30 14:04:05 s 1 -190410.72 6 +185820.34 5430.0 C57
2021-03-30 14:14:05 S 10 53 56.472 -35 28 47.39 V C57
2021-03-30 14:14:05 s 1 -190482.50 1 +185147.89 540.0 C57
2021-03-30 14:24:05 S 10 53 56.393 -35 28 22.73 V C57
2021-03-30 14:24:05 s 1 -190552.85 3 +184474.06 2930.0 C57
2021-03-30 14:34:05 S 10 53 56.491 -35 28 03.18 V C57
2021-03-30 14:34:05 s 1 -190621.77 5 +183798.84 2590.0 C57
2021-03-30 14:44:05 S 10 53 56.542 -35 27 43.63 V C57
2021-03-30 14:44:05 s 1 -190689.26 1 +183122.23 9490.0 C57
2021-03-30 14:54:05 S 10 53 56.544 -35 27 22.00 V C57
2021-03-30 14:54:05 s 1 -190755.30 2 +182444.23 3630.0 C57
2021-03-30 15:04:05 S 10 53 56.717 -35 27 02.05 V C57
2021-03-30 15:04:05 s 1 -190819.89 3 +181764.85 4990.0 C57
2021-03-30 15:14:05 S 10 53 56.626 -35 26 38.36 V C57
2021-03-30 15:14:05 s 1 -190883.02 5 +181084.07 3560.0 C57
2021-03-30 15:24:05 S 10 53 56.962 -35 26 17.70 V C57
2021-03-30 15:24:05 s 1 -190944.69 1 +180401.91 9320.0 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)