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
2021-01-24 00:24:07 S 05 25 26.638 -78 34 10.67 V C57
2021-01-24 00:24:07 s 1 -190630.05 1 +247563.18 2090.0 C57
2021-01-24 00:34:07 S 05 25 37.056 -78 34 04.62 V C57
2021-01-24 00:34:07 s 1 -190763.95 4 +247022.00 7250.0 C57
2021-01-24 00:54:07 S 05 25 56.354 -78 33 48.60 V C57
2021-01-24 00:54:07 s 1 -191029.09 4 +245936.22 2940.0 C57
2021-01-24 01:04:07 S 05 26 04.728 -78 33 43.06 V C57
2021-01-24 01:04:07 s 1 -191160.32 3 +245391.61 3460.0 C57
2021-01-24 01:14:07 S 05 26 15.530 -78 33 37.80 V C57
2021-01-24 01:14:07 s 1 -191290.65 5 +244845.84 2410.0 C57
2021-01-24 01:24:07 S 05 26 23.376 -78 33 32.33 V C57
2021-01-24 01:24:07 s 1 -191420.08 5 +244298.93 9790.0 C57
2021-01-24 01:34:07 S 05 26 34.908 -78 33 15.05 V C57
2021-01-24 01:34:07 s 1 -191548.60 9 +243750.87 5600.0 C57
2021-01-24 01:44:07 S 05 26 44.902 -78 33 00.50 V C57
2021-01-24 01:44:07 s 1 -191676.22 4 +243201.66 9830.0 C57
2021-01-24 01:54:07 S 05 26 53.556 -78 33 01.91 V C57
2021-01-24 01:54:07 s 1 -191802.92 7 +242651.29 2480.0 C57
2021-01-24 02:04:07 S 05 27 02.748 -78 32 56.83 V C57
2021-01-24 02:04:07 s 1 -191928.71 3 +242099.77 3520.0 C57
2021-01-24 02:14:07 S 05 27 12.262 -78 32 49.92 V C57
2021-01-24 02:14:07 s 1 -192053.57 9 +241547.10 2970.0 C57
2021-01-24 02:24:07 S 05 27 20.431 -78 32 40.34 V C57
2021-01-24 02:24:07 s 1 -192177.52 1 +240993.26 810.0 C57
2021-01-24 02:34:07 S 05 27 31.186 -78 32 34.22 V C57
2021-01-24 02:34:07 s 1 -192300.53 5 +240438.27 7040.0 C57
2021-01-24 02:44:07 S 05 27 40.774 -78 32 26.48 V C57
2021-01-24 02:44:07 s 1 -192422.61 8 +239882.12 1640.0 C57
2021-01-24 02:54:07 S 05 27 50.182 -78 32 19.28 V C57
2021-01-24 02:54:07 s 1 -192543.76 6 +239324.81 4620.0 C57
2021-01-24 03:04:07 S 05 27 58.982 -78 32 13.88 V C57
2021-01-24 03:04:07 s 1 -192663.97 5 +238766.34 5960.0 C57
2021-01-24 03:14:07 S 05 28 08.916 -78 32 03.55 V C57
2021-01-24 03:14:07 s 1 -192783.24 1 +238206.70 5660.0 C57
2021-01-24 03:24:07 S 05 28 18.756 -78 31 55.85 V C57
2021-01-24 03:24:07 s 1 -192901.56 0 +237645.90 3710.0 C57
2021-01-24 03:34:07 S 05 28 29.198 -78 31 49.94 V C57
2021-01-24 03:34:07 s 1 -193018.92 9 +237083.93 110.0 C57
2021-01-24 03:44:07 S 05 28 38.993 -78 31 42.20 V C57
2021-01-24 03:44:07 s 1 -193135.34 3 +236520.79 4840.0 C57
2021-01-24 03:54:07 S 05 28 47.146 -78 31 34.28 V C57
2021-01-24 03:54:07 s 1 -193250.79 9 +235956.49 7910.0 C57
2021-01-24 04:04:07 S 05 28 57.586 -78 31 26.65 V C57
2021-01-24 04:04:07 s 1 -193365.29 2 +235391.02 9300.0 C57
2021-01-24 04:14:07 S 05 29 06.362 -78 31 19.63 V C57
2021-01-24 04:14:07 s 1 -193478.81 9 +234824.37 9000.0 C57
2021-01-24 04:24:07 S 05 29 16.027 -78 31 11.06 V C57
2021-01-24 04:24:07 s 1 -193591.37 6 +234256.56 7010.0 C57
2021-01-24 04:34:07 S 05 29 25.992 -78 31 03.32 V C57
2021-01-24 04:34:07 s 1 -193702.95 8 +233687.57 3330.0 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)