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
2021-03-24 04:14:06 S 10 49 15.082 -40 22 13.37 V C57
2021-03-24 04:14:06 s 1 +97803.102 0 +321525.87 3450.0 C57
2021-03-24 05:34:06 S 10 49 20.119 -40 19 49.55 V C57
2021-03-24 05:34:06 s 1 +95118.020 0 +324315.55 1850.0 C57
2021-03-24 05:54:06 S 10 49 21.233 -40 19 11.14 V C57
2021-03-24 05:54:06 s 1 +94443.171 0 +325000.80 6310.0 C57
2021-03-24 06:04:06 S 10 49 21.847 -40 18 54.18 V C57
2021-03-24 06:04:06 s 1 +94105.221 0 +325341.61 2430.0 C57
2021-03-24 06:44:06 S 10 49 24.362 -40 17 42.72 V C57
2021-03-24 06:44:06 s 1 +92749.962 0 +326692.75 9480.0 C57
2021-03-24 07:04:06 S 10 49 25.634 -40 17 06.90 V C57
2021-03-24 07:04:06 s 1 +92070.284 0 +327361.08 3620.0 C57
2021-03-24 07:24:06 S 10 49 26.786 -40 16 29.35 V C57
2021-03-24 07:24:06 s 1 +91389.260 0 +328024.59 4890.0 C57
2021-03-24 08:14:06 S 10 49 29.822 -40 14 58.38 V C57
2021-03-24 08:14:06 s 1 +89680.917 0 +329662.37 5650.0 C57
2021-03-24 08:34:06 S 10 49 31.003 -40 14 21.59 V C57
2021-03-24 08:34:06 s 1 +88995.305 0 +330309.10 7080.0 C57
2021-03-24 08:44:06 S 10 49 31.750 -40 14 04.92 V C57
2021-03-24 08:44:06 s 1 +88652.019 0 +330630.67 1770.0 C57
2021-03-24 08:54:06 S 10 49 32.582 -40 13 42.10 V C57
2021-03-24 08:54:06 s 1 +88308.416 0 +330951.05 5770.0 C57
2021-03-24 09:14:06 S 10 49 33.374 -40 13 11.35 V C57
2021-03-24 09:14:06 s 1 +87620.264 0 +331588.24 1750.0 C57
2021-03-24 09:54:06 S 10 49 36.074 -40 11 56.83 V C57
2021-03-24 09:54:06 s 1 +86240.230 0 +332848.34 5670.0 C57
2021-03-24 10:04:06 S 10 49 36.626 -40 11 39.52 V C57
2021-03-24 10:04:06 s 1 +85894.455 0 +333160.40 5010.0 C57
2021-03-24 10:14:06 S 10 49 37.044 -40 11 22.88 V C57
2021-03-24 10:14:06 s 1 +85548.377 0 +333471.28 3690.0 C57
2021-03-24 10:24:06 S 10 49 37.670 -40 11 04.81 V C57
2021-03-24 10:24:06 s 1 +85201.998 0 +333780.97 1720.0 C57
2021-03-24 10:34:06 S 10 49 38.335 -40 10 45.84 V C57
2021-03-24 10:34:06 s 1 +84855.320 0 +334089.48 9100.0 C57
2021-03-24 10:44:06 S 10 49 38.995 -40 10 26.44 V C57
2021-03-24 10:44:06 s 1 +84508.343 0 +334396.81 5850.0 C57
2021-03-24 10:54:06 S 10 49 39.833 -40 10 06.60 V C57
2021-03-24 10:54:06 s 1 +84161.071 0 +334702.96 1950.0 C57
2021-03-24 11:24:06 S 10 49 41.424 -40 09 16.88 V C57
2021-03-24 11:24:06 s 1 +83117.497 0 +335614.33 6480.0 C57
2021-03-24 11:34:06 S 10 49 41.933 -40 08 56.94 V C57
2021-03-24 11:34:06 s 1 +82769.059 0 +335915.77 70.0 C57
2021-03-24 12:34:06 S 10 49 45.506 -40 07 09.91 V C57
2021-03-24 12:34:06 s 1 +80672.459 0 +337699.75 8690.0 C57
2021-03-24 12:44:06 S 10 49 46.082 -40 06 51.05 V C57
2021-03-24 12:44:06 s 1 +80322.046 0 +337992.98 8010.0 C57
2021-03-24 13:34:06 S 10 49 48.876 -40 05 19.72 V C57
2021-03-24 13:34:06 s 1 +78565.889 0 +339441.64 5720.0 C57
2021-03-24 15:04:06 S 10 49 54.043 -40 02 35.77 V C57
2021-03-24 15:04:06 s 1 +75388.130 0 +341976.00 7370.0 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)