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 15:34:05 S 10 53 56.810 -35 25 58.40 V C57
2021-03-30 15:34:05 s 1 -191004.88 4 +179718.34 2250.0 C57
2021-03-30 15:44:05 S 10 53 57.034 -35 25 37.13 V C57
2021-03-30 15:44:05 s 1 -191063.59 6 +179033.39 2360.0 C57
2021-03-30 15:54:05 S 10 53 56.866 -35 25 16.90 V C57
2021-03-30 15:54:05 s 1 -191120.82 0 +178347.03 9610.0 C57
2021-03-30 16:04:05 S 10 53 56.995 -35 24 54.00 V C57
2021-03-30 16:04:05 s 1 -191176.54 9 +177659.28 4000.0 C57
2021-03-30 16:14:05 S 10 53 56.873 -35 24 32.08 V C57
2021-03-30 16:14:05 s 1 -191230.77 4 +176970.13 5500.0 C57
2021-03-30 16:24:05 S 10 53 57.058 -35 24 11.84 V C57
2021-03-30 16:24:05 s 1 -191283.48 9 +176279.58 4110.0 C57
2021-03-30 16:34:05 S 10 53 57.043 -35 23 50.89 V C57
2021-03-30 16:34:05 s 1 -191334.68 4 +175587.63 9820.0 C57
2021-03-30 16:44:05 S 10 53 57.062 -35 23 28.86 V C57
2021-03-30 16:44:05 s 1 -191384.35 4 +174894.28 2590.0 C57
2021-03-30 16:54:05 S 10 53 57.055 -35 23 07.33 V C57
2021-03-30 16:54:05 s 1 -191432.48 9 +174199.52 2430.0 C57
2021-03-30 17:04:05 S 10 53 57.298 -35 22 48.25 V C57
2021-03-30 17:04:05 s 1 -191479.08 2 +173503.35 9310.0 C57
2021-03-30 17:14:05 S 10 53 57.290 -35 22 26.69 V C57
2021-03-30 17:14:05 s 1 -191524.12 5 +172805.78 3220.0 C57
2021-03-30 17:24:05 S 10 53 57.240 -35 22 03.22 V C57
2021-03-30 17:24:05 s 1 -191567.61 0 +172106.81 4140.0 C57
2021-03-30 17:34:05 S 10 53 57.298 -35 21 43.67 V C57
2021-03-30 17:34:05 s 1 -191609.52 9 +171406.42 2060.0 C57
2021-03-30 17:44:05 S 10 53 57.336 -35 21 21.49 V C57
2021-03-30 17:44:05 s 1 -191649.87 4 +170704.62 6960.0 C57
2021-03-30 17:54:05 S 10 53 57.384 -35 21 01.51 V C57
2021-03-30 17:54:05 s 1 -191688.63 7 +170001.42 8820.0 C57
2021-03-30 18:04:05 S 10 53 57.235 -35 20 39.84 V C57
2021-03-30 18:04:05 s 1 -191725.80 9 +169296.80 7640.0 C57
2021-03-30 18:14:05 S 10 53 57.319 -35 20 18.67 V C57
2021-03-30 18:14:05 s 1 -191761.38 2 +168590.76 3390.0 C57
2021-03-30 18:24:05 S 10 53 57.389 -35 19 58.44 V C57
2021-03-30 18:24:05 s 1 -191795.34 8 +167883.31 6050.0 C57
2021-03-30 18:34:05 S 10 53 57.528 -35 19 36.41 V C57
2021-03-30 18:34:05 s 1 -191827.69 8 +167174.45 5620.0 C57
2021-03-30 18:44:05 S 10 53 57.636 -35 19 14.41 V C57
2021-03-30 18:44:05 s 1 -191858.42 4 +166464.16 2070.0 C57
2021-03-30 18:54:05 S 10 53 57.571 -35 18 52.99 V C57
2021-03-30 18:54:05 s 1 -191887.51 8 +165752.46 5390.0 C57
2021-03-30 19:04:05 S 10 53 57.655 -35 18 31.86 V C57
2021-03-30 19:04:05 s 1 -191914.97 0 +165039.34 5560.0 C57
2021-03-30 19:14:05 S 10 53 57.706 -35 18 09.29 V C57
2021-03-30 19:14:05 s 1 -191940.77 2 +164324.80 2560.0 C57
2021-03-30 19:24:05 S 10 53 57.703 -35 17 48.34 V C57
2021-03-30 19:24:05 s 1 -191964.91 6 +163608.83 6380.0 C57
2021-03-30 19:34:05 S 10 53 57.710 -35 17 26.77 V C57
2021-03-30 19:34:05 s 1 -191987.39 3 +162891.44 7000.0 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)