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
2021-03-31 01:24:05 S 10 53 58.390 -35 04 53.40 V C57
2021-03-31 01:24:05 s 1 -191649.98 6 +136878.14 8730.0 C57
2021-03-31 01:44:05 S 10 53 58.541 -35 04 10.88 V C57
2021-03-31 01:44:05 s 1 -191559.89 5 +135338.11 330.0 C57
2021-03-31 01:54:05 S 10 53 58.606 -35 03 47.12 V C57
2021-03-31 01:54:05 s 1 -191511.77 0 +134565.91 5190.0 C57
2021-03-31 02:04:05 S 10 53 58.603 -35 03 26.71 V C57
2021-03-31 02:04:05 s 1 -191461.57 4 +133792.26 6080.0 C57
2021-03-31 02:14:05 S 10 53 58.685 -35 03 05.18 V C57
2021-03-31 02:14:05 s 1 -191409.29 8 +133017.15 2950.0 C57
2021-03-31 02:24:05 S 10 53 58.634 -35 02 44.02 V C57
2021-03-31 02:24:05 s 1 -191354.92 7 +132240.58 5780.0 C57
2021-03-31 02:34:05 S 10 53 58.819 -35 02 21.19 V C57
2021-03-31 02:34:05 s 1 -191298.45 0 +131462.55 4560.0 C57
2021-03-31 02:44:05 S 10 53 58.658 -35 01 59.95 V C57
2021-03-31 02:44:05 s 1 -191239.85 5 +130683.07 9260.0 C57
2021-03-31 02:54:05 S 10 53 58.865 -35 01 37.34 V C57
2021-03-31 02:54:05 s 1 -191179.12 9 +129902.12 9860.0 C57
2021-03-31 03:04:05 S 10 53 58.618 -35 01 15.06 V C57
2021-03-31 03:04:05 s 1 -191116.25 9 +129119.72 6320.0 C57
2021-03-31 03:14:05 S 10 53 58.836 -35 00 53.35 V C57
2021-03-31 03:14:05 s 1 -191051.23 4 +128335.85 8630.0 C57
2021-03-31 03:24:05 S 10 53 58.584 -35 00 32.22 V C57
2021-03-31 03:24:05 s 1 -190984.03 9 +127550.53 6750.0 C57
2021-03-31 03:34:05 S 10 53 58.826 -35 00 09.90 V C57
2021-03-31 03:34:05 s 1 -190914.66 3 +126763.74 670.0 C57
2021-03-31 03:44:05 S 10 53 58.594 -34 59 48.01 V C57
2021-03-31 03:44:05 s 1 -190843.09 2 +125975.50 370.0 C57
2021-03-31 03:54:05 S 10 53 59.227 -34 59 23.35 V C57
2021-03-31 03:54:05 s 1 -190769.31 3 +125185.80 5800.0 C57
2021-03-31 04:14:05 S 10 53 58.930 -34 58 43.43 V C57
2021-03-31 04:14:05 s 1 -190615.07 9 +123602.01 3800.0 C57
2021-03-31 04:24:05 S 10 53 58.805 -34 58 20.46 V C57
2021-03-31 04:24:05 s 1 -190534.59 7 +122807.92 6310.0 C57
2021-03-31 04:34:05 S 10 53 58.824 -34 57 58.54 V C57
2021-03-31 04:34:05 s 1 -190451.85 3 +122012.37 4450.0 C57
2021-03-31 04:44:05 S 10 53 58.942 -34 57 35.39 V C57
2021-03-31 04:44:05 s 1 -190366.83 4 +121215.37 8210.0 C57
2021-03-31 04:54:05 S 10 53 58.774 -34 57 11.77 V C57
2021-03-31 04:54:05 s 1 -190279.52 7 +120416.90 7560.0 C57
2021-03-31 05:04:05 S 10 53 58.867 -34 56 52.04 V C57
2021-03-31 05:04:05 s 1 -190189.91 6 +119616.97 2460.0 C57
2021-03-31 05:14:05 S 10 53 58.913 -34 56 30.26 V C57
2021-03-31 05:14:05 s 1 -190097.98 9 +118815.58 2900.0 C57
2021-03-31 05:24:05 S 10 53 58.723 -34 56 07.76 V C57
2021-03-31 05:24:05 s 1 -190003.73 1 +118012.74 8830.0 C57
2021-03-31 05:34:05 S 10 53 58.949 -34 55 48.00 V C57
2021-03-31 05:34:05 s 1 -189907.12 7 +117208.43 240.0 C57
2021-03-31 05:44:05 S 10 53 58.690 -34 55 22.40 V C57
2021-03-31 05:44:05 s 1 -189808.16 4 +116402.66 7100.0 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)