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
2021-03-16 14:14:06 s 1 -176146.54 6 +267828.67 1910.0 C57
2021-03-16 14:24:06 S 10 38 56.690 -47 17 16.62 V C57
2021-03-16 14:24:06 s 1 -176356.30 3 +267345.23 2660.0 C57
2021-03-16 14:34:06 S 10 38 56.568 -47 16 54.34 V C57
2021-03-16 14:34:06 s 1 -176565.31 0 +266860.63 2010.0 C57
2021-03-16 14:44:06 S 10 38 56.806 -47 16 34.00 V C57
2021-03-16 14:44:06 s 1 -176773.56 4 +266374.87 9950.0 C57
2021-03-16 14:54:06 S 10 38 56.477 -47 16 11.71 V C57
2021-03-16 14:54:06 s 1 -176981.06 2 +265887.95 6470.0 C57
2021-03-16 15:04:06 S 10 38 56.686 -47 15 53.24 V C57
2021-03-16 15:04:06 s 1 -177187.80 1 +265399.87 1580.0 C57
2021-03-16 15:14:06 S 10 38 56.650 -47 15 36.29 V C57
2021-03-16 15:14:06 s 1 -177393.77 9 +264910.62 5250.0 C57
2021-03-16 15:24:06 S 10 38 56.465 -47 15 12.85 V C57
2021-03-16 15:24:06 s 1 -177598.99 2 +264420.21 7500.0 C57
2021-03-16 15:34:06 S 10 38 56.491 -47 14 53.30 V C57
2021-03-16 15:34:06 s 1 -177803.43 7 +263928.63 8310.0 C57
2021-03-16 15:44:06 S 10 38 56.585 -47 14 31.45 V C57
2021-03-16 15:44:06 s 1 -178007.11 2 +263435.89 7670.0 C57
2021-03-16 15:54:06 S 10 38 56.472 -47 14 12.44 V C57
2021-03-16 15:54:06 s 1 -178210.01 3 +262941.98 5590.0 C57
2021-03-16 16:04:06 S 10 38 56.280 -47 13 52.86 V C57
2021-03-16 16:04:06 s 1 -178412.13 7 +262446.90 2050.0 C57
2021-03-16 16:14:06 S 10 38 56.304 -47 13 32.52 V C57
2021-03-16 16:14:06 s 1 -178613.48 1 +261950.65 7060.0 C57
2021-03-16 16:24:06 S 10 38 56.246 -47 13 11.82 V C57
2021-03-16 16:24:06 s 1 -178814.04 3 +261453.23 590.0 C57
2021-03-16 16:44:06 S 10 38 56.201 -47 12 29.48 V C57
2021-03-16 16:44:06 s 1 -179212.80 4 +260454.88 3240.0 C57
2021-03-16 16:54:06 S 10 38 56.042 -47 12 08.86 V C57
2021-03-16 16:54:06 s 1 -179410.99 9 +259953.95 2340.0 C57
2021-03-16 17:04:06 S 10 38 55.805 -47 11 49.09 V C57
2021-03-16 17:04:06 s 1 -179608.39 8 +259451.84 9950.0 C57
2021-03-16 17:14:06 S 10 38 55.848 -47 11 27.92 V C57
2021-03-16 17:14:06 s 1 -179804.99 8 +258948.55 6060.0 C57
2021-03-16 17:24:06 S 10 38 55.843 -47 11 06.65 V C57
2021-03-16 17:24:06 s 1 -180000.79 7 +258444.09 670.0 C57
2021-03-16 17:34:06 S 10 38 55.824 -47 10 45.73 V C57
2021-03-16 17:34:06 s 1 -180195.79 1 +257938.46 3780.0 C57
2021-03-16 17:44:06 S 10 38 55.625 -47 10 26.26 V C57
2021-03-16 17:44:06 s 1 -180389.97 7 +257431.64 5360.0 C57
2021-03-16 17:54:06 S 10 38 55.702 -47 10 04.87 V C57
2021-03-16 17:54:06 s 1 -180583.35 3 +256923.64 5430.0 C57
2021-03-16 18:04:06 S 10 38 55.608 -47 09 44.32 V C57
2021-03-16 18:04:06 s 1 -180775.91 3 +256414.47 3970.0 C57
2021-03-16 18:14:06 S 10 38 55.380 -47 09 23.69 V C57
2021-03-16 18:14:06 s 1 -180967.65 6 +255904.11 980.0 C57
2021-03-16 18:24:06 S 10 38 55.488 -47 09 06.12 V C57
2021-03-16 18:24:06 s 1 -181158.57 9 +255392.57 6450.0 C57
2021-03-16 18:34:06 S 10 38 55.634 -47 08 42.11 V 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)