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 21:54:05 S 10 53 49.649 -36 02 31.99 V C57
2021-03-29 21:54:05 s 1 -177634.09 9 +244679.78 1290.0 C57
2021-03-29 22:04:06 S 10 53 49.651 -36 02 09.42 V C57
2021-03-29 22:04:06 s 1 -177816.50 3 +244135.22 7270.0 C57
2021-03-29 22:14:05 S 10 53 49.795 -36 01 52.79 V C57
2021-03-29 22:14:05 s 1 -177997.99 2 +243589.41 1520.0 C57
2021-03-29 22:24:05 S 10 53 49.774 -36 01 27.88 V C57
2021-03-29 22:24:05 s 1 -178178.56 3 +243042.34 4020.0 C57
2021-03-29 22:34:05 S 10 53 49.846 -36 01 10.96 V C57
2021-03-29 22:34:05 s 1 -178358.21 2 +242494.01 4780.0 C57
2021-03-29 22:44:05 S 10 53 50.042 -36 00 46.55 V C57
2021-03-29 22:44:05 s 1 -178536.93 4 +241944.42 3770.0 C57
2021-03-29 22:54:05 S 10 53 50.182 -36 00 29.88 V C57
2021-03-29 22:54:05 s 1 -178714.72 6 +241393.57 1010.0 C57
2021-03-29 23:04:05 S 10 53 50.311 -36 00 10.04 V C57
2021-03-29 23:04:05 s 1 -178891.58 3 +240841.46 6460.0 C57
2021-03-29 23:14:06 S 10 53 50.273 -35 59 48.77 V C57
2021-03-29 23:14:06 s 1 -179067.50 3 +240288.08 140.0 C57
2021-03-29 23:24:05 S 10 53 50.496 -35 59 31.85 V C57
2021-03-29 23:24:05 s 1 -179242.48 0 +239733.45 2030.0 C57
2021-03-29 23:34:06 S 10 53 50.522 -35 59 08.52 V C57
2021-03-29 23:34:06 s 1 -179416.51 1 +239177.54 2130.0 C57
2021-03-29 23:44:05 S 10 53 50.993 -35 58 45.66 V C57
2021-03-29 23:44:05 s 1 -179589.59 2 +238620.37 410.0 C57
2021-03-29 23:54:05 S 10 53 50.988 -35 58 29.46 V C57
2021-03-29 23:54:05 s 1 -179761.71 9 +238061.93 6890.0 C57
2021-03-30 00:14:05 S 10 53 50.837 -35 57 41.22 V C57
2021-03-30 00:14:05 s 1 -180103.09 2 +236941.24 4380.0 C57
2021-03-30 00:34:05 S 10 53 51.041 -35 57 06.37 V C57
2021-03-30 00:34:05 s 1 -180440.59 9 +235815.46 4520.0 C57
2021-03-30 00:44:06 S 10 53 51.101 -35 56 45.71 V C57
2021-03-30 00:44:06 s 1 -180607.89 2 +235250.66 1820.0 C57
2021-03-30 00:54:05 S 10 53 51.154 -35 56 23.39 V C57
2021-03-30 00:54:05 s 1 -180774.20 6 +234684.58 7260.0 C57
2021-03-30 01:04:06 S 10 53 51.293 -35 56 03.01 V C57
2021-03-30 01:04:06 s 1 -180939.53 6 +234117.23 830.0 C57
2021-03-30 01:14:05 S 10 53 51.259 -35 55 44.87 V C57
2021-03-30 01:14:05 s 1 -181103.87 9 +233548.60 2520.0 C57
2021-03-30 01:24:05 S 10 53 51.478 -35 55 22.48 V C57
2021-03-30 01:24:05 s 1 -181267.22 9 +232978.69 2330.0 C57
2021-03-30 01:34:05 S 10 53 51.624 -35 55 02.53 V C57
2021-03-30 01:34:05 s 1 -181429.58 3 +232407.50 240.0 C57
2021-03-30 01:44:05 S 10 53 51.602 -35 54 42.48 V C57
2021-03-30 01:44:05 s 1 -181590.93 7 +231835.02 6250.0 C57
2021-03-30 01:54:05 S 10 53 51.828 -35 54 21.96 V C57
2021-03-30 01:54:05 s 1 -181751.28 5 +231261.26 350.0 C57
2021-03-30 02:04:05 S 10 53 51.734 -35 54 00.65 V C57
2021-03-30 02:04:05 s 1 -181910.62 5 +230686.22 2530.0 C57
2021-03-30 02:14:06 S 10 53 51.982 -35 53 40.78 V C57
2021-03-30 02:14:06 s 1 -182068.95 0 +230109.89 2790.0 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)