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 18:14:07 S 07 29 30.132 -76 52 28.31 V C57
2021-01-28 18:14:07 s 1 +153718.61 5 +139064.78 9790.0 C57
2021-01-28 19:14:07 S 07 30 18.067 -76 52 39.86 V C57
2021-01-28 19:14:07 s 1 +153626.14 6 +144279.50 440.0 C57
2021-01-28 19:24:07 S 07 30 26.362 -76 52 43.07 V C57
2021-01-28 19:24:07 s 1 +153602.58 9 +145141.03 2280.0 C57
2021-01-28 19:34:07 S 07 30 34.872 -76 52 45.80 V C57
2021-01-28 19:34:07 s 1 +153576.75 6 +146000.41 9940.0 C57
2021-01-28 19:44:07 S 07 30 41.866 -76 52 45.95 V C57
2021-01-28 19:44:07 s 1 +153548.66 4 +146857.63 3460.0 C57
2021-01-28 19:54:07 S 07 30 50.580 -76 52 50.74 V C57
2021-01-28 19:54:07 s 1 +153518.33 1 +147712.70 2870.0 C57
2021-01-28 20:04:07 S 07 30 58.606 -76 52 49.33 V C57
2021-01-28 20:04:07 s 1 +153485.77 7 +148565.63 8200.0 C57
2021-01-28 20:14:07 S 07 31 05.076 -76 52 48.47 V C57
2021-01-28 20:14:07 s 1 +153451.01 8 +149416.42 9490.0 C57
2021-01-28 20:24:07 S 07 31 14.885 -76 52 51.46 V C57
2021-01-28 20:24:07 s 1 +153414.07 3 +150265.07 6770.0 C57
2021-01-28 20:34:07 S 07 31 21.173 -76 52 58.40 V C57
2021-01-28 20:34:07 s 1 +153374.95 8 +151111.60 60.0 C57
2021-01-28 20:44:07 S 07 31 30.019 -76 53 02.65 V C57
2021-01-28 20:44:07 s 1 +153333.69 1 +151955.99 9410.0 C57
2021-01-28 20:54:07 S 07 31 37.778 -76 53 00.74 V C57
2021-01-28 20:54:07 s 1 +153290.28 9 +152798.27 4840.0 C57
2021-01-28 21:04:07 S 07 31 45.758 -76 53 01.57 V C57
2021-01-28 21:04:07 s 1 +153244.76 9 +153638.43 6380.0 C57
2021-01-28 21:14:07 S 07 31 53.064 -76 53 04.96 V C57
2021-01-28 21:14:07 s 1 +153197.14 8 +154476.48 4060.0 C57
2021-01-28 21:24:07 S 07 32 01.272 -76 53 05.06 V C57
2021-01-28 21:24:07 s 1 +153147.44 2 +155312.42 7910.0 C57
2021-01-28 21:34:07 S 07 32 09.410 -76 53 08.02 V C57
2021-01-28 21:34:07 s 1 +153095.66 8 +156146.26 7970.0 C57
2021-01-28 21:44:07 S 07 32 16.834 -76 53 07.76 V C57
2021-01-28 21:44:07 s 1 +153041.84 1 +156978.00 4260.0 C57
2021-01-28 21:54:07 S 07 32 24.266 -76 53 09.20 V C57
2021-01-28 21:54:07 s 1 +152985.97 8 +157807.64 6810.0 C57
2021-01-28 22:04:07 S 07 32 31.879 -76 53 11.80 V C57
2021-01-28 22:04:07 s 1 +152928.09 4 +158635.20 5650.0 C57
2021-01-28 22:14:07 S 07 32 39.924 -76 53 12.84 V C57
2021-01-28 22:14:07 s 1 +152868.20 6 +159460.67 810.0 C57
2021-01-28 22:24:07 S 07 32 46.879 -76 53 13.70 V C57
2021-01-28 22:24:07 s 1 +152806.32 9 +160284.06 2310.0 C57
2021-01-28 22:34:07 S 07 32 56.366 -76 53 18.13 V C57
2021-01-28 22:34:07 s 1 +152742.47 8 +161105.37 190.0 C57
2021-01-28 22:54:07 S 07 33 11.167 -76 53 20.29 V C57
2021-01-28 22:54:07 s 1 +152608.91 4 +162741.79 5170.0 C57
2021-01-28 23:04:07 S 07 33 19.032 -76 53 21.52 V C57
2021-01-28 23:04:07 s 1 +152539.23 2 +163556.90 2340.0 C57
2021-01-28 23:14:07 S 07 33 26.026 -76 53 21.91 V C57
2021-01-28 23:14:07 s 1 +152467.63 5 +164369.96 5980.0 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)