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
2021-01-28 09:14:07 S 07 21 50.136 -76 49 38.93 V C57
2021-01-28 09:14:07 s 1 +150030.68 9 +88493.784 160.0 C57
2021-01-28 09:24:07 S 07 21 59.186 -76 49 40.12 V C57
2021-01-28 09:24:07 s 1 +150187.14 5 +89491.268 1270.0 C57
2021-01-28 09:34:07 S 07 22 08.568 -76 49 44.98 V C57
2021-01-28 09:34:07 s 1 +150339.71 2 +90486.429 5290.0 C57
2021-01-28 09:44:07 S 07 22 16.860 -76 49 50.99 V C57
2021-01-28 09:44:07 s 1 +150488.42 7 +91479.264 2270.0 C57
2021-01-28 09:54:07 S 07 22 25.574 -76 49 51.46 V C57
2021-01-28 09:54:07 s 1 +150633.32 7 +92469.774 2290.0 C57
2021-01-28 10:04:07 S 07 22 34.507 -76 49 56.35 V C57
2021-01-28 10:04:07 s 1 +150774.44 9 +93457.958 5410.0 C57
2021-01-28 10:14:07 S 07 22 43.147 -76 50 00.42 V C57
2021-01-28 10:14:07 s 1 +150911.83 0 +94443.817 1700.0 C57
2021-01-28 10:54:07 S 07 23 19.486 -76 50 14.82 V C57
2021-01-28 10:54:07 s 1 +151424.65 2 +98364.005 9850.0 C57
2021-01-28 11:04:07 S 07 23 28.097 -76 50 20.76 V C57
2021-01-28 11:04:07 s 1 +151543.85 6 +99338.243 2940.0 C57
2021-01-28 11:14:07 S 07 23 36.343 -76 50 20.72 V C57
2021-01-28 11:14:07 s 1 +151659.52 8 +100310.15 9590.0 C57
2021-01-28 11:24:07 S 07 23 46.368 -76 50 27.17 V C57
2021-01-28 11:24:07 s 1 +151771.70 2 +101279.75 9840.0 C57
2021-01-28 11:34:07 S 07 23 54.420 -76 50 30.08 V C57
2021-01-28 11:34:07 s 1 +151880.40 9 +102247.03 3760.0 C57
2021-01-28 11:44:07 S 07 24 02.340 -76 50 33.90 V C57
2021-01-28 11:44:07 s 1 +151985.68 3 +103211.99 1410.0 C57
2021-01-28 11:54:07 S 07 24 12.115 -76 50 37.82 V C57
2021-01-28 11:54:07 s 1 +152087.55 5 +104174.63 2840.0 C57
2021-01-28 12:04:07 S 07 24 20.302 -76 50 41.60 V C57
2021-01-28 12:04:07 s 1 +152186.05 8 +105134.96 8110.0 C57
2021-01-28 12:14:07 S 07 24 27.811 -76 50 42.25 V C57
2021-01-28 12:14:07 s 1 +152281.22 2 +106092.97 7280.0 C57
2021-01-28 12:24:07 S 07 24 38.268 -76 50 49.34 V C57
2021-01-28 12:24:07 s 1 +152373.07 8 +107048.68 410.0 C57
2021-01-28 12:34:07 S 07 24 46.339 -76 50 51.76 V C57
2021-01-28 12:34:07 s 1 +152461.65 8 +108002.07 7540.0 C57
2021-01-28 12:44:07 S 07 24 54.540 -76 50 52.19 V C57
2021-01-28 12:44:07 s 1 +152546.99 0 +108953.16 8750.0 C57
2021-01-28 12:54:07 S 07 25 03.389 -76 50 57.84 V C57
2021-01-28 12:54:07 s 1 +152629.10 5 +109901.95 4060.0 C57
2021-01-28 13:04:07 S 07 25 11.554 -76 51 00.86 V C57
2021-01-28 13:04:07 s 1 +152708.03 2 +110848.43 3550.0 C57
2021-01-28 13:14:07 S 07 25 20.335 -76 51 05.90 V C57
2021-01-28 13:14:07 s 1 +152783.80 0 +111792.62 7270.0 C57
2021-01-28 13:24:07 S 07 25 28.154 -76 51 07.96 V C57
2021-01-28 13:24:07 s 1 +152856.43 9 +112734.51 5260.0 C57
2021-01-28 13:34:07 S 07 25 37.687 -76 51 05.51 V C57
2021-01-28 13:34:07 s 1 +152925.97 5 +113674.10 7580.0 C57
2021-01-28 13:44:07 S 07 25 46.380 -76 51 13.25 V C57
2021-01-28 13:44:07 s 1 +152992.43 8 +114611.41 4280.0 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)