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
2021-03-23 17:54:06 S 10 48 33.614 -40 40 51.67 V C57
2021-03-23 17:54:06 s 1 +117724.07 1 +297201.08 7010.0 C57
2021-03-23 18:04:06 S 10 48 34.327 -40 40 34.39 V C57
2021-03-23 18:04:06 s 1 +117416.88 4 +297632.37 8120.0 C57
2021-03-23 18:14:06 S 10 48 35.054 -40 40 15.02 V C57
2021-03-23 18:14:06 s 1 +117109.18 3 +298062.36 8160.0 C57
2021-03-23 18:24:06 S 10 48 35.726 -40 39 57.85 V C57
2021-03-23 18:24:06 s 1 +116800.97 1 +298491.04 7120.0 C57
2021-03-23 18:34:06 S 10 48 36.427 -40 39 40.14 V C57
2021-03-23 18:34:06 s 1 +116492.25 2 +298918.42 5030.0 C57
2021-03-23 18:44:06 S 10 48 37.291 -40 39 20.45 V C57
2021-03-23 18:44:06 s 1 +116183.02 8 +299344.50 1870.0 C57
2021-03-23 18:54:06 S 10 48 37.838 -40 39 01.37 V C57
2021-03-23 18:54:06 s 1 +115873.30 1 +299769.28 7660.0 C57
2021-03-23 19:04:06 S 10 48 38.306 -40 38 45.35 V C57
2021-03-23 19:04:06 s 1 +115563.07 5 +300192.76 2400.0 C57
2021-03-23 19:14:06 S 10 48 39.091 -40 38 28.03 V C57
2021-03-23 19:14:06 s 1 +115252.35 1 +300614.95 6100.0 C57
2021-03-23 19:24:06 S 10 48 39.742 -40 38 08.41 V C57
2021-03-23 19:24:06 s 1 +114941.13 3 +301035.83 8760.0 C57
2021-03-23 19:34:06 S 10 48 40.490 -40 37 50.81 V C57
2021-03-23 19:34:06 s 1 +114629.42 3 +301455.43 390.0 C57
2021-03-23 19:44:06 S 10 48 41.328 -40 37 33.31 V C57
2021-03-23 19:44:06 s 1 +114317.22 4 +301873.73 990.0 C57
2021-03-23 19:54:06 S 10 48 42.002 -40 37 15.17 V C57
2021-03-23 19:54:06 s 1 +114004.53 8 +302290.74 570.0 C57
2021-03-23 20:04:06 S 10 48 42.590 -40 36 55.55 V C57
2021-03-23 20:04:06 s 1 +113691.36 7 +302706.46 9130.0 C57
2021-03-23 20:14:06 S 10 48 43.130 -40 36 38.88 V C57
2021-03-23 20:14:06 s 1 +113377.71 5 +303120.89 6680.0 C57
2021-03-23 20:24:06 S 10 48 43.922 -40 36 20.66 V C57
2021-03-23 20:24:06 s 1 +113063.58 4 +303534.04 3230.0 C57
2021-03-23 20:34:06 S 10 48 44.652 -40 36 00.43 V C57
2021-03-23 20:34:06 s 1 +112748.97 6 +303945.90 8770.0 C57
2021-03-23 20:44:06 S 10 48 45.312 -40 35 45.60 V C57
2021-03-23 20:44:06 s 1 +112433.89 4 +304356.48 3310.0 C57
2021-03-23 20:54:06 S 10 48 45.734 -40 35 26.59 V C57
2021-03-23 20:54:06 s 1 +112118.34 0 +304765.77 6860.0 C57
2021-03-23 21:04:06 S 10 48 46.812 -40 35 09.13 V C57
2021-03-23 21:04:06 s 1 +111802.31 7 +305173.79 9430.0 C57
2021-03-23 21:14:06 S 10 48 47.208 -40 34 51.24 V C57
2021-03-23 21:14:06 s 1 +111485.82 8 +305580.52 1010.0 C57
2021-03-23 21:24:06 S 10 48 48.144 -40 34 31.15 V C57
2021-03-23 21:24:06 s 1 +111168.87 4 +305985.97 1620.0 C57
2021-03-23 21:34:06 S 10 48 48.799 -40 34 15.24 V C57
2021-03-23 21:34:06 s 1 +110851.45 9 +306390.15 1250.0 C57
2021-03-23 21:44:06 S 10 48 49.404 -40 33 56.30 V C57
2021-03-23 21:44:06 s 1 +110533.58 4 +306793.06 9920.0 C57
2021-03-23 21:54:06 S 10 48 50.143 -40 33 38.38 V C57
2021-03-23 21:54:06 s 1 +110215.25 3 +307194.69 7630.0 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)