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
2021-03-15 07:14:06 S 10 38 53.424 -48 18 08.68 V C57
2021-03-15 07:14:06 s 1 -126698.83 4 +338461.22 5940.0 C57
2021-03-15 07:24:06 S 10 38 53.544 -48 17 52.26 V C57
2021-03-15 07:24:06 s 1 -127008.76 1 +338180.17 1860.0 C57
2021-03-15 07:34:06 S 10 38 53.688 -48 17 31.85 V C57
2021-03-15 07:34:06 s 1 -127318.31 4 +337898.09 7090.0 C57
2021-03-15 07:44:06 S 10 38 53.729 -48 17 12.19 V C57
2021-03-15 07:44:06 s 1 -127627.49 2 +337614.97 1650.0 C57
2021-03-15 07:54:06 S 10 38 53.734 -48 16 55.67 V C57
2021-03-15 07:54:06 s 1 -127936.29 2 +337330.82 5520.0 C57
2021-03-15 08:04:06 S 10 38 54.154 -48 16 33.13 V C57
2021-03-15 08:04:06 s 1 -128244.71 4 +337045.63 8710.0 C57
2021-03-15 08:24:06 S 10 38 54.444 -48 15 55.40 V C57
2021-03-15 08:24:06 s 1 -128860.41 7 +336472.15 3030.0 C57
2021-03-15 08:34:06 S 10 38 54.466 -48 15 41.76 V C57
2021-03-15 08:34:06 s 1 -129167.69 5 +336183.85 4150.0 C57
2021-03-15 08:44:06 S 10 38 54.554 -48 15 20.70 V C57
2021-03-15 08:44:06 s 1 -129474.58 9 +335894.52 4570.0 C57
2021-03-15 08:54:06 S 10 38 54.290 -48 15 04.00 V C57
2021-03-15 08:54:06 s 1 -129781.09 8 +335604.16 4300.0 C57
2021-03-15 09:04:06 S 10 38 54.300 -48 14 44.05 V C57
2021-03-15 09:04:06 s 1 -130087.21 9 +335312.75 3320.0 C57
2021-03-15 09:14:06 S 10 38 54.593 -48 14 26.20 V C57
2021-03-15 09:14:06 s 1 -130392.95 1 +335020.31 1640.0 C57
2021-03-15 09:34:06 S 10 38 54.641 -48 13 46.63 V C57
2021-03-15 09:34:06 s 1 -131003.24 5 +334432.31 6160.0 C57
2021-03-15 09:44:06 S 10 38 54.734 -48 13 29.06 V C57
2021-03-15 09:44:06 s 1 -131307.80 3 +334136.76 2350.0 C57
2021-03-15 09:54:06 S 10 38 54.703 -48 13 11.35 V C57
2021-03-15 09:54:06 s 1 -131611.96 7 +333840.16 7820.0 C57
2021-03-15 10:04:06 S 10 38 54.890 -48 12 50.18 V C57
2021-03-15 10:04:06 s 1 -131915.73 4 +333542.52 2580.0 C57
2021-03-15 10:14:06 S 10 38 54.792 -48 12 30.92 V C57
2021-03-15 10:14:06 s 1 -132219.10 5 +333243.84 6610.0 C57
2021-03-15 10:24:06 S 10 38 54.914 -48 12 11.63 V C57
2021-03-15 10:24:06 s 1 -132522.07 6 +332944.13 9920.0 C57
2021-03-15 10:34:06 S 10 38 55.039 -48 11 53.81 V C57
2021-03-15 10:34:06 s 1 -132824.64 7 +332643.37 2500.0 C57
2021-03-15 10:44:06 S 10 38 55.368 -48 11 32.86 V C57
2021-03-15 10:44:06 s 1 -133126.81 6 +332341.56 4350.0 C57
2021-03-15 10:54:06 S 10 38 55.049 -48 11 13.74 V C57
2021-03-15 10:54:06 s 1 -133428.58 1 +332038.72 5470.0 C57
2021-03-15 11:04:06 S 10 38 54.919 -48 10 57.32 V C57
2021-03-15 11:04:06 s 1 -133729.94 2 +331734.83 5850.0 C57
2021-03-15 12:04:06 S 10 38 55.860 -48 09 03.06 V C57
2021-03-15 12:04:06 s 1 -135529.51 5 +329889.58 2510.0 C57
2021-03-15 12:14:06 S 10 38 55.738 -48 08 44.59 V C57
2021-03-15 12:14:06 s 1 -135827.99 8 +329578.38 7650.0 C57
2021-03-15 12:24:06 S 10 38 55.666 -48 08 23.42 V C57
2021-03-15 12:24:06 s 1 -136126.06 3 +329266.14 2030.0 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)