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
2021-01-23 16:04:07 S 05 17 31.414 -78 39 24.08 V C57
2021-01-23 16:04:07 s 1 -182876.47 4 +273188.35 7590.0 C57
2021-01-23 16:14:07 S 05 17 41.254 -78 39 18.04 V C57
2021-01-23 16:14:07 s 1 -183050.62 1 +272702.93 2520.0 C57
2021-01-23 16:24:08 S 05 17 50.220 -78 39 15.19 V C57
2021-01-23 16:24:08 s 1 -183224.03 6 +272216.43 6180.0 C57
2021-01-23 16:34:07 S 05 17 58.606 -78 39 10.01 V C57
2021-01-23 16:34:07 s 1 -183396.71 6 +271728.84 8580.0 C57
2021-01-23 16:44:07 S 05 18 09.701 -78 39 02.23 V C57
2021-01-23 16:44:07 s 1 -183568.65 8 +271240.15 9690.0 C57
2021-01-23 16:54:07 S 05 18 18.571 -78 38 57.19 V C57
2021-01-23 16:54:07 s 1 -183739.86 0 +270750.38 9530.0 C57
2021-01-23 17:04:07 S 05 18 28.169 -78 38 51.86 V C57
2021-01-23 17:04:07 s 1 -183910.31 9 +270259.51 8080.0 C57
2021-01-23 17:14:07 S 05 18 37.010 -78 38 48.73 V C57
2021-01-23 17:14:07 s 1 -184080.03 1 +269767.55 5340.0 C57
2021-01-23 17:24:07 S 05 18 48.259 -78 38 42.76 V C57
2021-01-23 17:24:07 s 1 -184248.99 5 +269274.50 1300.0 C57
2021-01-23 17:34:07 S 05 18 56.710 -78 38 32.93 V C57
2021-01-23 17:34:07 s 1 -184417.20 8 +268780.34 5970.0 C57
2021-01-23 17:44:07 S 05 19 06.115 -78 38 27.78 V C57
2021-01-23 17:44:07 s 1 -184584.66 6 +268285.10 9330.0 C57
2021-01-23 17:54:08 S 05 19 15.074 -78 38 22.99 V C57
2021-01-23 17:54:08 s 1 -184751.36 7 +267788.75 1370.0 C57
2021-01-23 18:04:07 S 05 19 24.408 -78 38 16.01 V C57
2021-01-23 18:04:07 s 1 -184917.30 8 +267291.31 2110.0 C57
2021-01-23 18:14:07 S 05 19 34.774 -78 38 08.27 V C57
2021-01-23 18:14:07 s 1 -185082.48 6 +266792.76 1520.0 C57
2021-01-23 18:24:07 S 05 19 44.585 -78 38 05.71 V C57
2021-01-23 18:24:07 s 1 -185246.89 8 +266293.11 9600.0 C57
2021-01-23 18:34:07 S 05 19 54.190 -78 38 00.06 V C57
2021-01-23 18:34:07 s 1 -185410.54 1 +265792.37 6360.0 C57
2021-01-23 18:44:07 S 05 20 03.571 -78 37 56.21 V C57
2021-01-23 18:44:07 s 1 -185573.41 3 +265290.52 1780.0 C57
2021-01-23 18:54:07 S 05 20 13.022 -78 37 47.35 V C57
2021-01-23 18:54:07 s 1 -185735.51 0 +264787.56 5860.0 C57
2021-01-23 19:04:07 S 05 20 22.462 -78 37 40.94 V C57
2021-01-23 19:04:07 s 1 -185896.82 9 +264283.50 8590.0 C57
2021-01-23 19:14:07 S 05 20 32.016 -78 37 38.53 V C57
2021-01-23 19:14:07 s 1 -186057.36 8 +263778.33 9970.0 C57
2021-01-23 19:24:07 S 05 20 41.280 -78 37 29.75 V C57
2021-01-23 19:24:07 s 1 -186217.12 4 +263272.06 9990.0 C57
2021-01-23 19:34:07 S 05 20 50.952 -78 37 23.84 V C57
2021-01-23 19:34:07 s 1 -186376.09 3 +262764.67 8650.0 C57
2021-01-23 19:44:07 S 05 21 00.984 -78 37 18.41 V C57
2021-01-23 19:44:07 s 1 -186534.27 2 +262256.18 5940.0 C57
2021-01-23 19:54:07 S 05 21 10.666 -78 37 12.11 V C57
2021-01-23 19:54:07 s 1 -186691.65 9 +261746.57 1860.0 C57
2021-01-23 20:04:07 S 05 21 19.870 -78 37 04.69 V C57
2021-01-23 20:04:07 s 1 -186848.25 1 +261235.86 6390.0 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)