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 17:24:05 S 10 53 46.850 -36 11 37.14 V C57
2021-03-29 17:24:05 s 1 -172377.02 9 +258912.55 290.0 C57
2021-03-29 17:34:06 S 10 53 47.026 -36 11 16.40 V C57
2021-03-29 17:34:06 s 1 -172582.74 0 +258401.45 420.0 C57
2021-03-29 17:44:05 S 10 53 47.038 -36 10 56.82 V C57
2021-03-29 17:44:05 s 1 -172787.63 3 +257889.12 9010.0 C57
2021-03-29 17:54:06 S 10 53 47.297 -36 10 38.64 V C57
2021-03-29 17:54:06 s 1 -172991.70 6 +257375.57 6040.0 C57
2021-03-29 18:04:05 S 10 53 47.347 -36 10 18.01 V C57
2021-03-29 18:04:05 s 1 -173194.95 4 +256860.79 1520.0 C57
2021-03-29 18:14:05 S 10 53 47.338 -36 09 57.10 V C57
2021-03-29 18:14:05 s 1 -173397.37 4 +256344.78 5420.0 C57
2021-03-29 18:24:05 S 10 53 47.527 -36 09 37.08 V C57
2021-03-29 18:24:05 s 1 -173598.96 3 +255827.55 7750.0 C57
2021-03-29 18:34:05 S 10 53 47.534 -36 09 16.45 V C57
2021-03-29 18:34:05 s 1 -173799.71 7 +255309.08 8510.0 C57
2021-03-29 18:44:06 S 10 53 47.779 -36 08 55.28 V C57
2021-03-29 18:44:06 s 1 -173999.63 3 +254789.39 7670.0 C57
2021-03-29 18:54:05 S 10 53 47.844 -36 08 35.56 V C57
2021-03-29 18:54:05 s 1 -174198.70 8 +254268.46 5250.0 C57
2021-03-29 19:04:06 S 10 53 47.806 -36 08 15.97 V C57
2021-03-29 19:04:06 s 1 -174396.93 8 +253746.30 1220.0 C57
2021-03-29 19:14:05 S 10 53 48.115 -36 07 57.43 V C57
2021-03-29 19:14:05 s 1 -174594.31 9 +253222.91 5590.0 C57
2021-03-29 19:24:06 S 10 53 48.137 -36 07 34.32 V C57
2021-03-29 19:24:06 s 1 -174790.84 8 +252698.28 8340.0 C57
2021-03-29 19:34:05 S 10 53 48.266 -36 07 15.17 V C57
2021-03-29 19:34:05 s 1 -174986.52 1 +252172.41 9480.0 C57
2021-03-29 19:44:05 S 10 53 48.379 -36 06 54.97 V C57
2021-03-29 19:44:05 s 1 -175181.33 6 +251645.31 8980.0 C57
2021-03-29 19:54:05 S 10 53 48.276 -36 06 33.30 V C57
2021-03-29 19:54:05 s 1 -175375.28 8 +251116.96 6850.0 C57
2021-03-29 20:04:05 S 10 53 48.547 -36 06 14.80 V C57
2021-03-29 20:04:05 s 1 -175568.37 3 +250587.38 3080.0 C57
2021-03-29 20:14:06 S 10 53 48.499 -36 05 53.20 V C57
2021-03-29 20:14:06 s 1 -175760.58 9 +250056.56 7670.0 C57
2021-03-29 20:24:05 S 10 53 48.319 -36 05 32.42 V C57
2021-03-29 20:24:05 s 1 -175951.93 2 +249524.49 600.0 C57
2021-03-29 20:54:05 S 10 53 49.138 -36 04 32.48 V C57
2021-03-29 20:54:05 s 1 -176520.68 1 +247920.82 9380.0 C57
2021-03-29 21:04:05 S 10 53 48.989 -36 04 11.21 V C57
2021-03-29 21:04:05 s 1 -176708.49 3 +247383.78 5610.0 C57
2021-03-29 21:14:05 S 10 53 49.294 -36 03 52.52 V C57
2021-03-29 21:14:05 s 1 -176895.41 3 +246845.48 160.0 C57
2021-03-29 21:24:05 S 10 53 49.310 -36 03 33.48 V C57
2021-03-29 21:24:05 s 1 -177081.43 7 +246305.93 3010.0 C57
2021-03-29 21:34:05 S 10 53 49.354 -36 03 10.33 V C57
2021-03-29 21:34:05 s 1 -177266.56 2 +245765.13 4150.0 C57
2021-03-29 21:44:06 S 10 53 49.690 -36 02 52.80 V C57
2021-03-29 21:44:06 s 1 -177450.78 4 +245223.08 3580.0 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)