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
2021-03-09 14:24:05 s 1 +147024.19 7 +212789.11 9620.0 C57
2021-03-09 14:34:05 S 10 32 11.057 -52 06 06.48 V C57
2021-03-09 14:34:05 s 1 +146837.67 4 +213457.62 2690.0 C57
2021-03-09 14:44:05 S 10 32 12.199 -52 05 50.82 V C57
2021-03-09 14:44:05 s 1 +146649.96 0 +214124.40 3270.0 C57
2021-03-09 14:54:05 S 10 32 13.207 -52 05 36.67 V C57
2021-03-09 14:54:05 s 1 +146461.06 4 +214789.46 1370.0 C57
2021-03-09 15:04:05 S 10 32 14.453 -52 05 21.23 V C57
2021-03-09 15:04:05 s 1 +146270.99 3 +215452.80 7000.0 C57
2021-03-09 15:14:05 S 10 32 15.365 -52 05 02.54 V C57
2021-03-09 15:14:05 s 1 +146079.75 4 +216114.42 170.0 C57
2021-03-09 15:24:05 S 10 32 16.378 -52 04 48.76 V C57
2021-03-09 15:24:05 s 1 +145887.35 4 +216774.33 910.0 C57
2021-03-09 15:34:05 S 10 32 17.213 -52 04 32.59 V C57
2021-03-09 15:34:05 s 1 +145693.80 0 +217432.53 9230.0 C57
2021-03-09 15:44:05 S 10 32 18.542 -52 04 16.68 V C57
2021-03-09 15:44:05 s 1 +145499.10 1 +218089.02 5140.0 C57
2021-03-09 15:54:05 S 10 32 19.421 -52 04 04.15 V C57
2021-03-09 15:54:05 s 1 +145303.26 1 +218743.80 8650.0 C57
2021-03-09 16:04:05 S 10 32 20.683 -52 03 47.41 V C57
2021-03-09 16:04:05 s 1 +145106.29 0 +219396.89 9790.0 C57
2021-03-09 16:14:05 S 10 32 22.231 -52 03 33.62 V C57
2021-03-09 16:14:05 s 1 +144908.19 3 +220048.27 8550.0 C57
2021-03-09 16:24:05 S 10 32 22.958 -52 03 15.26 V C57
2021-03-09 16:24:05 s 1 +144708.97 8 +220697.96 4970.0 C57
2021-03-09 16:54:05 S 10 32 26.218 -52 02 29.90 V C57
2021-03-09 16:54:05 s 1 +144104.69 2 +222636.90 230.0 C57
2021-03-09 17:04:05 S 10 32 27.499 -52 02 13.09 V C57
2021-03-09 17:04:05 s 1 +143901.07 2 +223279.85 7370.0 C57
2021-03-09 17:14:05 S 10 32 28.272 -52 01 59.52 V C57
2021-03-09 17:14:05 s 1 +143696.36 7 +223921.12 2220.0 C57
2021-03-09 17:24:05 S 10 32 29.654 -52 01 43.61 V C57
2021-03-09 17:24:05 s 1 +143490.58 5 +224560.71 4800.0 C57
2021-03-09 17:34:05 S 10 32 30.461 -52 01 28.70 V C57
2021-03-09 17:34:05 s 1 +143283.73 1 +225198.62 5130.0 C57
2021-03-09 17:44:05 S 10 32 31.826 -52 01 13.94 V C57
2021-03-09 17:44:05 s 1 +143075.81 2 +225834.87 3200.0 C57
2021-03-09 17:54:05 S 10 32 32.458 -52 00 56.70 V C57
2021-03-09 17:54:05 s 1 +142866.83 6 +226469.45 9050.0 C57
2021-03-09 18:04:05 S 10 32 33.710 -52 00 43.31 V C57
2021-03-09 18:04:05 s 1 +142656.80 7 +227102.37 2670.0 C57
2021-03-09 18:14:05 S 10 32 34.608 -52 00 26.14 V C57
2021-03-09 18:14:05 s 1 +142445.73 3 +227733.63 4090.0 C57
2021-03-09 18:34:05 S 10 32 37.116 -51 59 54.96 V C57
2021-03-09 18:34:05 s 1 +142020.47 3 +228991.18 350.0 C57
2021-03-09 18:44:05 S 10 32 37.766 -51 59 39.19 V C57
2021-03-09 18:44:05 s 1 +141806.30 0 +229617.48 5220.0 C57
2021-03-09 18:54:05 S 10 32 38.983 -51 59 24.40 V C57
2021-03-09 18:54:05 s 1 +141591.10 6 +230242.12 7930.0 C57
2021-03-09 19:04:05 S 10 32 39.876 -51 59 07.30 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)