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 09:54:07 S 05 34 31.915 -78 26 36.53 V C57
2021-01-24 09:54:07 s 1 -196733.76 8 +214852.28 3540.0 C57
2021-01-24 10:24:07 S 05 35 01.013 -78 26 01.93 V C57
2021-01-24 10:24:07 s 1 -196961.40 6 +213023.21 5460.0 C57
2021-01-24 10:34:07 S 05 35 10.286 -78 25 53.22 V C57
2021-01-24 10:34:07 s 1 -197035.01 9 +212411.08 5470.0 C57
2021-01-24 10:44:07 S 05 35 19.862 -78 25 45.01 V C57
2021-01-24 10:44:07 s 1 -197107.49 1 +211797.72 3480.0 C57
2021-01-24 10:54:07 S 05 35 28.550 -78 25 35.36 V C57
2021-01-24 10:54:07 s 1 -197178.81 6 +211183.14 9480.0 C57
2021-01-24 11:04:07 S 05 35 38.674 -78 25 26.15 V C57
2021-01-24 11:04:07 s 1 -197248.98 9 +210567.33 3470.0 C57
2021-01-24 11:14:07 S 05 35 46.750 -78 25 17.87 V C57
2021-01-24 11:14:07 s 1 -197318.00 6 +209950.29 5430.0 C57
2021-01-24 11:24:07 S 05 35 56.765 -78 25 08.54 V C57
2021-01-24 11:24:07 s 1 -197385.86 0 +209332.03 5360.0 C57
2021-01-24 11:34:07 S 05 36 07.591 -78 24 59.44 V C57
2021-01-24 11:34:07 s 1 -197452.54 8 +208712.53 3240.0 C57
2021-01-24 11:44:07 S 05 36 16.270 -78 24 50.83 V C57
2021-01-24 11:44:07 s 1 -197518.06 3 +208091.80 9070.0 C57
2021-01-24 11:54:07 S 05 36 25.440 -78 24 42.52 V C57
2021-01-24 11:54:07 s 1 -197582.40 0 +207469.83 2840.0 C57
2021-01-24 12:04:07 S 05 36 35.556 -78 24 29.66 V C57
2021-01-24 12:04:07 s 1 -197645.55 4 +206846.63 4530.0 C57
2021-01-24 12:14:07 S 05 36 44.429 -78 24 19.91 V C57
2021-01-24 12:14:07 s 1 -197707.52 0 +206222.20 4140.0 C57
2021-01-24 12:24:07 S 05 36 54.079 -78 24 11.95 V C57
2021-01-24 12:24:07 s 1 -197768.29 2 +205596.52 1660.0 C57
2021-01-24 12:34:07 S 05 37 04.666 -78 24 00.86 V C57
2021-01-24 12:34:07 s 1 -197827.86 5 +204969.60 7080.0 C57
2021-01-24 12:44:07 S 05 37 13.675 -78 23 51.04 V C57
2021-01-24 12:44:07 s 1 -197886.23 3 +204341.45 390.0 C57
2021-01-24 12:54:07 S 05 37 22.855 -78 23 40.78 V C57
2021-01-24 12:54:07 s 1 -197943.39 1 +203712.05 1580.0 C57
2021-01-24 13:04:07 S 05 37 32.654 -78 23 30.44 V C57
2021-01-24 13:04:07 s 1 -197999.33 4 +203081.41 630.0 C57
2021-01-24 13:14:07 S 05 37 42.934 -78 23 21.37 V C57
2021-01-24 13:14:07 s 1 -198054.05 6 +202449.52 7550.0 C57
2021-01-24 13:34:07 S 05 38 01.572 -78 23 03.95 V C57
2021-01-24 13:34:07 s 1 -198159.81 3 +201182.00 4910.0 C57
2021-01-24 13:44:07 S 05 38 10.855 -78 22 50.27 V C57
2021-01-24 13:44:07 s 1 -198210.83 7 +200546.36 5340.0 C57
2021-01-24 13:54:07 S 05 38 20.342 -78 22 43.82 V C57
2021-01-24 13:54:07 s 1 -198260.61 7 +199909.48 3590.0 C57
2021-01-24 14:04:07 S 05 38 30.547 -78 22 36.59 V C57
2021-01-24 14:04:07 s 1 -198309.14 8 +199271.34 9650.0 C57
2021-01-24 14:14:07 S 05 38 40.306 -78 22 21.79 V C57
2021-01-24 14:14:07 s 1 -198356.42 4 +198631.95 3500.0 C57
2021-01-24 14:24:07 S 05 38 49.550 -78 22 14.20 V C57
2021-01-24 14:24:07 s 1 -198402.43 9 +197991.30 5140.0 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)