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
2021-03-10 03:54:05 s 1 +128610.26 9 +261605.24 1110.0 C57
2021-03-10 04:04:05 S 10 33 33.091 -51 45 11.38 V C57
2021-03-10 04:04:05 s 1 +128347.29 1 +262143.59 1880.0 C57
2021-03-10 04:14:05 S 10 33 34.200 -51 44 56.18 V C57
2021-03-10 04:14:05 s 1 +128083.57 8 +262680.44 1060.0 C57
2021-03-10 04:54:05 S 10 33 37.920 -51 43 57.11 V C57
2021-03-10 04:54:05 s 1 +127021.45 0 +264812.95 2110.0 C57
2021-03-10 05:04:05 S 10 33 38.959 -51 43 42.82 V C57
2021-03-10 05:04:05 s 1 +126754.12 0 +265342.36 3490.0 C57
2021-03-10 05:34:05 S 10 33 41.537 -51 42 57.35 V C57
2021-03-10 05:34:05 s 1 +125947.87 9 +266921.72 8450.0 C57
2021-03-10 05:44:05 S 10 33 42.386 -51 42 38.20 V C57
2021-03-10 05:44:05 s 1 +125677.72 8 +267445.23 3730.0 C57
2021-03-10 06:34:05 S 10 33 46.721 -51 41 22.09 V C57
2021-03-10 06:34:05 s 1 +124316.62 4 +270040.72 7730.0 C57
2021-03-10 06:44:05 S 10 33 47.688 -51 41 04.31 V C57
2021-03-10 06:44:05 s 1 +124042.36 0 +270555.43 4100.0 C57
2021-03-10 06:54:05 S 10 33 48.706 -51 40 51.46 V C57
2021-03-10 06:54:05 s 1 +123767.42 4 +271068.68 9020.0 C57
2021-03-10 07:14:05 S 10 33 50.611 -51 40 17.54 V C57
2021-03-10 07:14:05 s 1 +123215.55 1 +272090.82 4500.0 C57
2021-03-10 07:44:05 S 10 33 53.318 -51 39 32.47 V C57
2021-03-10 07:44:05 s 1 +122382.79 5 +273613.16 1990.0 C57
2021-03-10 08:24:05 S 10 33 56.933 -51 38 33.00 V C57
2021-03-10 08:24:05 s 1 +121263.37 2 +275622.74 8900.0 C57
2021-03-10 08:44:05 S 10 33 58.409 -51 38 03.08 V C57
2021-03-10 08:44:05 s 1 +120699.83 4 +276618.91 9020.0 C57
2021-03-10 08:54:05 S 10 33 59.417 -51 37 43.00 V C57
2021-03-10 08:54:05 s 1 +120417.12 0 +277114.85 7020.0 C57
2021-03-10 09:04:05 S 10 34 00.470 -51 37 25.90 V C57
2021-03-10 09:04:05 s 1 +120133.78 2 +277609.36 3660.0 C57
2021-03-10 09:24:05 S 10 34 01.894 -51 36 57.49 V C57
2021-03-10 09:24:05 s 1 +119565.24 5 +278594.10 2890.0 C57
2021-03-10 09:34:05 S 10 34 02.738 -51 36 42.08 V C57
2021-03-10 09:34:05 s 1 +119280.05 3 +279084.34 5490.0 C57
2021-03-10 09:54:05 S 10 34 04.457 -51 36 10.19 V C57
2021-03-10 09:54:05 s 1 +118707.84 0 +280060.56 6680.0 C57
2021-03-10 10:04:05 S 10 34 05.714 -51 35 54.38 V C57
2021-03-10 10:04:05 s 1 +118420.82 6 +280546.54 5300.0 C57
2021-03-10 11:14:05 S 10 34 11.532 -51 34 05.88 V C57
2021-03-10 11:14:05 s 1 +116395.08 7 +283908.97 9200.0 C57
2021-03-10 13:34:05 S 10 34 23.165 -51 30 30.49 V C57
2021-03-10 13:34:05 s 1 +112259.74 5 +290428.91 2920.0 C57
2021-03-10 15:14:05 S 10 34 30.946 -51 27 54.97 V C57
2021-03-10 15:14:05 s 1 +109241.29 5 +294921.19 3080.0 C57
2021-03-10 16:54:05 S 10 34 39.262 -51 25 20.82 V C57
2021-03-10 16:54:05 s 1 +106172.28 8 +299278.29 1210.0 C57
2021-03-10 17:14:05 S 10 34 40.517 -51 24 47.34 V C57
2021-03-10 17:14:05 s 1 +105552.66 4 +300133.65 7880.0 C57
2021-03-10 17:24:05 S 10 34 41.206 -51 24 31.28 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)