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
2021-03-29 08:34:06 S 10 53 40.495 -36 29 17.77 V C57
2021-03-29 08:34:06 s 1 -160386.07 9 +284278.34 8070.0 C57
2021-03-29 08:44:05 S 10 53 40.337 -36 28 55.78 V C57
2021-03-29 08:44:05 s 1 -160630.75 4 +283830.56 1720.0 C57
2021-03-29 08:54:06 S 10 53 40.925 -36 28 39.90 V C57
2021-03-29 08:54:06 s 1 -160874.76 6 +283381.61 4130.0 C57
2021-03-29 09:04:05 S 10 53 40.925 -36 28 18.12 V C57
2021-03-29 09:04:05 s 1 -161118.11 4 +282931.49 5280.0 C57
2021-03-29 09:14:06 S 10 53 40.910 -36 27 59.87 V C57
2021-03-29 09:14:06 s 1 -161360.79 4 +282480.20 5180.0 C57
2021-03-29 09:24:05 S 10 53 41.215 -36 27 39.35 V C57
2021-03-29 09:24:05 s 1 -161602.80 4 +282027.75 3820.0 C57
2021-03-29 09:34:05 S 10 53 41.316 -36 27 19.30 V C57
2021-03-29 09:34:05 s 1 -161844.14 1 +281574.11 1190.0 C57
2021-03-29 09:44:06 S 10 53 41.335 -36 26 59.89 V C57
2021-03-29 09:44:06 s 1 -162084.80 4 +281119.31 7290.0 C57
2021-03-29 09:54:05 S 10 53 41.534 -36 26 40.34 V C57
2021-03-29 09:54:05 s 1 -162324.78 8 +280663.33 2120.0 C57
2021-03-29 10:04:06 S 10 53 41.501 -36 26 19.50 V C57
2021-03-29 10:04:06 s 1 -162564.09 2 +280206.18 5660.0 C57
2021-03-29 10:14:05 S 10 53 41.851 -36 26 00.67 V C57
2021-03-29 10:14:05 s 1 -162802.71 3 +279747.85 7910.0 C57
2021-03-29 10:24:06 S 10 53 41.849 -36 25 40.44 V C57
2021-03-29 10:24:06 s 1 -163040.64 7 +279288.34 8880.0 C57
2021-03-29 10:34:05 S 10 53 42.070 -36 25 20.10 V C57
2021-03-29 10:34:05 s 1 -163277.89 4 +278827.66 8550.0 C57
2021-03-29 10:44:06 S 10 53 42.259 -36 24 59.33 V C57
2021-03-29 10:44:06 s 1 -163514.44 8 +278365.79 6910.0 C57
2021-03-29 10:54:05 S 10 53 42.106 -36 24 40.07 V C57
2021-03-29 10:54:05 s 1 -163750.30 9 +277902.75 3970.0 C57
2021-03-29 11:04:05 S 10 53 42.576 -36 24 20.16 V C57
2021-03-29 11:04:05 s 1 -163985.47 3 +277438.52 9710.0 C57
2021-03-29 11:14:06 S 10 53 42.514 -36 24 00.50 V C57
2021-03-29 11:14:06 s 1 -164219.93 8 +276973.11 4140.0 C57
2021-03-29 11:24:05 S 10 53 42.749 -36 23 38.76 V C57
2021-03-29 11:24:05 s 1 -164453.70 0 +276506.52 7240.0 C57
2021-03-29 11:34:06 S 10 53 42.874 -36 23 19.86 V C57
2021-03-29 11:34:06 s 1 -164686.75 7 +276038.75 9020.0 C57
2021-03-29 11:44:05 S 10 53 42.914 -36 23 00.02 V C57
2021-03-29 11:44:05 s 1 -164919.10 7 +275569.79 9460.0 C57
2021-03-29 11:54:06 S 10 53 43.267 -36 22 42.53 V C57
2021-03-29 11:54:06 s 1 -165150.74 6 +275099.64 8560.0 C57
2021-03-29 12:04:05 S 10 53 43.322 -36 22 20.21 V C57
2021-03-29 12:04:05 s 1 -165381.67 1 +274628.31 6310.0 C57
2021-03-29 12:34:05 S 10 53 43.630 -36 21 22.90 V C57
2021-03-29 12:34:05 s 1 -166070.13 8 +273207.18 1450.0 C57
2021-03-29 12:44:06 S 10 53 43.646 -36 21 01.40 V C57
2021-03-29 12:44:06 s 1 -166298.18 2 +272731.09 3770.0 C57
2021-03-29 12:54:05 S 10 53 43.762 -36 20 39.16 V C57
2021-03-29 12:54:05 s 1 -166525.49 7 +272253.80 4720.0 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)