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
2021-03-22 01:54:06 S 10 45 04.735 -41 54 05.98 V C57
2021-03-22 01:54:06 s 1 +167415.81 7 +151518.46 9460.0 C57
2021-03-22 02:04:06 S 10 45 05.755 -41 53 48.01 V C57
2021-03-22 02:04:06 s 1 +167364.39 4 +152321.23 9170.0 C57
2021-03-22 02:14:06 S 10 45 06.926 -41 53 29.54 V C57
2021-03-22 02:14:06 s 1 +167310.96 0 +153122.17 4880.0 C57
2021-03-22 02:24:06 S 10 45 08.011 -41 53 10.10 V C57
2021-03-22 02:24:06 s 1 +167255.53 0 +153921.29 6630.0 C57
2021-03-22 02:34:06 S 10 45 09.276 -41 52 52.36 V C57
2021-03-22 02:34:06 s 1 +167198.11 8 +154718.57 4430.0 C57
2021-03-22 02:44:06 S 10 45 10.202 -41 52 32.92 V C57
2021-03-22 02:44:06 s 1 +167138.73 6 +155514.03 8320.0 C57
2021-03-22 02:54:06 S 10 45 11.467 -41 52 12.94 V C57
2021-03-22 02:54:06 s 1 +167077.39 7 +156307.67 8310.0 C57
2021-03-22 03:04:06 S 10 45 12.317 -41 51 55.08 V C57
2021-03-22 03:04:06 s 1 +167014.11 6 +157099.49 4440.0 C57
2021-03-22 03:14:06 S 10 45 13.589 -41 51 36.00 V C57
2021-03-22 03:14:06 s 1 +166948.90 5 +157889.48 6720.0 C57
2021-03-22 03:24:06 S 10 45 14.614 -41 51 16.67 V C57
2021-03-22 03:24:06 s 1 +166881.77 6 +158677.67 5190.0 C57
2021-03-22 03:34:06 S 10 45 15.564 -41 50 58.34 V C57
2021-03-22 03:34:06 s 1 +166812.74 3 +159464.04 9860.0 C57
2021-03-22 03:44:06 S 10 45 16.714 -41 50 40.63 V C57
2021-03-22 03:44:06 s 1 +166741.81 7 +160248.60 770.0 C57
2021-03-22 03:54:06 S 10 45 17.772 -41 50 19.61 V C57
2021-03-22 03:54:06 s 1 +166669.01 3 +161031.35 7940.0 C57
2021-03-22 04:04:06 S 10 45 18.775 -41 50 01.50 V C57
2021-03-22 04:04:06 s 1 +166594.34 2 +161812.29 1380.0 C57
2021-03-22 04:14:06 S 10 45 19.654 -41 49 43.21 V C57
2021-03-22 04:14:06 s 1 +166517.81 6 +162591.43 1130.0 C57
2021-03-22 04:24:06 S 10 45 20.789 -41 49 23.59 V C57
2021-03-22 04:24:06 s 1 +166439.44 7 +163368.77 7210.0 C57
2021-03-22 04:34:06 S 10 45 21.828 -41 49 05.63 V C57
2021-03-22 04:34:06 s 1 +166359.24 9 +164144.31 9630.0 C57
2021-03-22 04:44:06 S 10 45 22.752 -41 48 45.68 V C57
2021-03-22 04:44:06 s 1 +166277.23 2 +164918.05 8440.0 C57
2021-03-22 04:54:06 S 10 45 23.830 -41 48 28.15 V C57
2021-03-22 04:54:06 s 1 +166193.40 9 +165690.00 3630.0 C57
2021-03-22 05:04:06 S 10 45 24.816 -41 48 07.31 V C57
2021-03-22 05:04:06 s 1 +166107.79 1 +166460.16 5250.0 C57
2021-03-22 05:14:06 S 10 45 25.925 -41 47 51.22 V C57
2021-03-22 05:14:06 s 1 +166020.39 1 +167228.53 3320.0 C57
2021-03-22 05:24:06 S 10 45 26.957 -41 47 32.21 V C57
2021-03-22 05:24:06 s 1 +165931.21 9 +167995.11 7840.0 C57
2021-03-22 05:34:06 S 10 45 27.845 -41 47 12.59 V C57
2021-03-22 05:34:06 s 1 +165840.28 7 +168759.91 8860.0 C57
2021-03-22 05:44:06 S 10 45 28.838 -41 46 53.80 V C57
2021-03-22 05:44:06 s 1 +165747.60 7 +169522.93 6380.0 C57
2021-03-22 05:54:06 S 10 45 30.259 -41 46 35.18 V C57
2021-03-22 05:54:06 s 1 +165653.19 0 +170284.16 440.0 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)