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
2021-03-15 02:54:06 S 10 38 51.098 -48 26 14.68 V C57
2021-03-15 02:54:06 s 1 -118513.98 0 +345407.23 3920.0 C57
2021-03-15 03:04:06 S 10 38 51.158 -48 26 00.67 V C57
2021-03-15 03:04:06 s 1 -118833.14 8 +345152.91 6460.0 C57
2021-03-15 03:14:06 S 10 38 51.444 -48 25 41.52 V C57
2021-03-15 03:14:06 s 1 -119151.97 7 +344897.55 8380.0 C57
2021-03-15 03:24:06 S 10 38 51.130 -48 25 21.25 V C57
2021-03-15 03:24:06 s 1 -119470.46 6 +344641.18 9700.0 C57
2021-03-15 03:34:06 S 10 38 51.130 -48 25 03.86 V C57
2021-03-15 03:34:06 s 1 -119788.61 4 +344383.78 410.0 C57
2021-03-15 03:54:06 S 10 38 51.482 -48 24 24.52 V C57
2021-03-15 03:54:06 s 1 -120423.88 2 +343865.91 9980.0 C57
2021-03-15 04:04:06 S 10 38 51.811 -48 24 06.98 V C57
2021-03-15 04:04:06 s 1 -120740.99 9 +343605.44 8840.0 C57
2021-03-15 04:14:06 S 10 38 51.979 -48 23 47.69 V C57
2021-03-15 04:14:06 s 1 -121057.76 9 +343343.94 7070.0 C57
2021-03-15 04:24:06 S 10 38 51.965 -48 23 29.72 V C57
2021-03-15 04:24:06 s 1 -121374.19 2 +343081.41 4680.0 C57
2021-03-15 04:34:06 S 10 38 51.996 -48 23 10.03 V C57
2021-03-15 04:34:06 s 1 -121690.26 5 +342817.87 1670.0 C57
2021-03-15 04:44:06 S 10 38 52.313 -48 22 53.18 V C57
2021-03-15 04:44:06 s 1 -122005.98 8 +342553.29 8020.0 C57
2021-03-15 04:54:06 S 10 38 52.291 -48 22 33.78 V C57
2021-03-15 04:54:06 s 1 -122321.35 9 +342287.69 3750.0 C57
2021-03-15 05:04:06 S 10 38 52.558 -48 22 13.55 V C57
2021-03-15 05:04:06 s 1 -122636.37 6 +342021.06 8830.0 C57
2021-03-15 05:14:06 S 10 38 52.565 -48 21 56.30 V C57
2021-03-15 05:14:06 s 1 -122951.03 9 +341753.40 3280.0 C57
2021-03-15 05:24:06 S 10 38 52.733 -48 21 36.61 V C57
2021-03-15 05:24:06 s 1 -123265.34 6 +341484.72 7090.0 C57
2021-03-15 05:34:06 S 10 38 52.622 -48 21 18.07 V C57
2021-03-15 05:34:06 s 1 -123579.29 6 +341215.00 260.0 C57
2021-03-15 05:44:06 S 10 38 52.562 -48 21 00.29 V C57
2021-03-15 05:44:06 s 1 -123892.88 7 +340944.26 2780.0 C57
2021-03-15 05:54:06 S 10 38 53.030 -48 20 40.67 V C57
2021-03-15 05:54:06 s 1 -124206.11 8 +340672.49 4650.0 C57
2021-03-15 06:04:06 S 10 38 53.196 -48 20 19.39 V C57
2021-03-15 06:04:06 s 1 -124518.98 7 +340399.69 5870.0 C57
2021-03-15 06:14:06 S 10 38 53.110 -48 20 03.05 V C57
2021-03-15 06:14:06 s 1 -124831.49 4 +340125.86 6430.0 C57
2021-03-15 06:24:06 S 10 38 53.033 -48 19 47.68 V C57
2021-03-15 06:24:06 s 1 -125143.63 6 +339851.00 6340.0 C57
2021-03-15 06:34:06 S 10 38 53.242 -48 19 26.22 V C57
2021-03-15 06:34:06 s 1 -125455.41 2 +339575.11 5590.0 C57
2021-03-15 06:44:06 S 10 38 53.378 -48 19 06.35 V C57
2021-03-15 06:44:06 s 1 -125766.82 2 +339298.18 4180.0 C57
2021-03-15 06:54:06 S 10 38 53.489 -48 18 49.18 V C57
2021-03-15 06:54:06 s 1 -126077.86 3 +339020.23 2100.0 C57
2021-03-15 07:04:06 S 10 38 53.400 -48 18 28.58 V C57
2021-03-15 07:04:06 s 1 -126388.53 4 +338741.24 9360.0 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)