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
2021-03-17 15:14:06 s 1 -197258.93 0 +181781.15 2200.0 C57
2021-03-17 15:24:06 S 10 38 43.234 -46 24 14.51 V C57
2021-03-17 15:24:06 s 1 -197313.07 7 +181111.91 9740.0 C57
2021-03-17 15:34:06 S 10 38 43.128 -46 23 50.28 V C57
2021-03-17 15:34:06 s 1 -197365.79 9 +180441.34 4580.0 C57
2021-03-17 15:44:06 S 10 38 42.785 -46 23 31.27 V C57
2021-03-17 15:44:06 s 1 -197417.08 8 +179769.46 6710.0 C57
2021-03-17 15:54:06 S 10 38 42.746 -46 23 08.30 V C57
2021-03-17 15:54:06 s 1 -197466.93 7 +179096.24 6110.0 C57
2021-03-17 16:04:06 S 10 38 42.538 -46 22 44.15 V C57
2021-03-17 16:04:06 s 1 -197515.34 0 +178421.71 2780.0 C57
2021-03-17 16:14:06 S 10 38 42.586 -46 22 25.00 V C57
2021-03-17 16:14:06 s 1 -197562.28 9 +177745.84 6690.0 C57
2021-03-17 16:24:06 S 10 38 42.305 -46 22 03.36 V C57
2021-03-17 16:24:06 s 1 -197607.77 7 +177068.65 7830.0 C57
2021-03-17 16:34:06 S 10 38 42.086 -46 21 39.96 V C57
2021-03-17 16:34:06 s 1 -197651.79 8 +176390.12 6190.0 C57
2021-03-17 16:44:06 S 10 38 42.050 -46 21 17.96 V C57
2021-03-17 16:44:06 s 1 -197694.34 3 +175710.27 1760.0 C57
2021-03-17 16:54:06 S 10 38 41.818 -46 20 55.28 V C57
2021-03-17 16:54:06 s 1 -197735.40 6 +175029.08 4520.0 C57
2021-03-17 17:04:06 S 10 38 41.798 -46 20 32.60 V C57
2021-03-17 17:04:06 s 1 -197774.97 9 +174346.56 4450.0 C57
2021-03-17 17:14:06 S 10 38 41.510 -46 20 11.87 V C57
2021-03-17 17:14:06 s 1 -197813.05 5 +173662.71 1550.0 C57
2021-03-17 17:34:06 S 10 38 41.561 -46 19 26.51 V C57
2021-03-17 17:34:06 s 1 -197884.68 7 +172291.00 7190.0 C57
2021-03-17 17:44:06 S 10 38 41.311 -46 19 03.47 V C57
2021-03-17 17:44:06 s 1 -197918.22 8 +171603.15 5690.0 C57
2021-03-17 18:14:06 S 10 38 41.203 -46 17 57.52 V C57
2021-03-17 18:14:06 s 1 -198009.65 7 +169531.54 3790.0 C57
2021-03-17 18:24:06 S 10 38 40.752 -46 17 35.52 V C57
2021-03-17 18:24:06 s 1 -198037.04 5 +168838.33 630.0 C57
2021-03-17 18:34:06 S 10 38 40.471 -46 17 11.22 V C57
2021-03-17 18:34:06 s 1 -198062.87 4 +168143.77 4520.0 C57
2021-03-17 18:44:06 S 10 38 40.399 -46 16 51.17 V C57
2021-03-17 18:44:06 s 1 -198087.13 8 +167447.87 5440.0 C57
2021-03-17 18:54:06 S 10 38 40.231 -46 16 29.57 V C57
2021-03-17 18:54:06 s 1 -198109.82 9 +166750.63 3380.0 C57
2021-03-17 19:04:06 S 10 38 40.030 -46 16 04.66 V C57
2021-03-17 19:04:06 s 1 -198130.93 8 +166052.04 8320.0 C57
2021-03-17 19:14:06 S 10 38 39.994 -46 15 43.09 V C57
2021-03-17 19:14:06 s 1 -198150.45 8 +165352.11 240.0 C57
2021-03-17 19:24:06 S 10 38 39.912 -46 15 17.57 V C57
2021-03-17 19:24:06 s 1 -198168.38 1 +164650.84 9140.0 C57
2021-03-17 19:34:06 S 10 38 39.929 -46 14 59.86 V C57
2021-03-17 19:34:06 s 1 -198184.69 8 +163948.21 4990.0 C57
2021-03-17 19:44:06 S 10 38 39.540 -46 14 33.61 V C57
2021-03-17 19:44:06 s 1 -198199.40 2 +163244.24 7780.0 C57
2021-03-17 19:54:06 S 10 38 39.230 -46 14 13.42 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)