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
2021-03-30 06:44:06 S 10 53 53.856 -35 44 23.39 V C57
2021-03-30 06:44:06 s 1 -185943.65 5 +214058.06 8320.0 C57
2021-03-30 06:54:05 S 10 53 53.995 -35 44 04.09 V C57
2021-03-30 06:54:05 s 1 -186071.69 2 +213445.18 910.0 C57
2021-03-30 07:04:05 S 10 53 53.945 -35 43 43.07 V C57
2021-03-30 07:04:05 s 1 -186198.57 4 +212830.98 1300.0 C57
2021-03-30 07:14:05 S 10 53 54.120 -35 43 23.27 V C57
2021-03-30 07:14:05 s 1 -186324.29 8 +212215.45 9480.0 C57
2021-03-30 07:24:05 S 10 53 54.252 -35 43 01.85 V C57
2021-03-30 07:24:05 s 1 -186448.85 7 +211598.60 5440.0 C57
2021-03-30 07:34:05 S 10 53 54.283 -35 42 40.28 V C57
2021-03-30 07:34:05 s 1 -186572.24 6 +210980.42 9170.0 C57
2021-03-30 07:44:05 S 10 53 54.324 -35 42 20.99 V C57
2021-03-30 07:44:05 s 1 -186694.45 9 +210360.90 650.0 C57
2021-03-30 07:54:05 S 10 53 54.346 -35 42 00.90 V C57
2021-03-30 07:54:05 s 1 -186815.49 2 +209740.06 9890.0 C57
2021-03-30 08:04:05 S 10 53 54.319 -35 41 37.43 V C57
2021-03-30 08:04:05 s 1 -186935.33 9 +209117.88 6860.0 C57
2021-03-30 08:14:06 S 10 53 54.475 -35 41 18.60 V C57
2021-03-30 08:14:06 s 1 -187053.99 5 +208494.37 1560.0 C57
2021-03-30 08:24:05 S 10 53 54.461 -35 40 58.01 V C57
2021-03-30 08:24:05 s 1 -187171.45 3 +207869.52 3980.0 C57
2021-03-30 08:34:05 S 10 53 54.533 -35 40 37.42 V C57
2021-03-30 08:34:05 s 1 -187287.70 8 +207243.34 4100.0 C57
2021-03-30 08:44:05 S 10 53 54.682 -35 40 16.14 V C57
2021-03-30 08:44:05 s 1 -187402.75 5 +206615.82 1910.0 C57
2021-03-30 08:54:05 S 10 53 54.754 -35 39 55.55 V C57
2021-03-30 08:54:05 s 1 -187516.58 8 +205986.96 7410.0 C57
2021-03-30 09:04:05 S 10 53 54.802 -35 39 34.45 V C57
2021-03-30 09:04:05 s 1 -187629.20 1 +205356.75 580.0 C57
2021-03-30 09:14:05 S 10 53 54.902 -35 39 13.93 V C57
2021-03-30 09:14:05 s 1 -187740.58 9 +204725.21 1410.0 C57
2021-03-30 09:24:05 S 10 53 54.955 -35 38 52.26 V C57
2021-03-30 09:24:05 s 1 -187850.74 6 +204092.32 9890.0 C57
2021-03-30 09:34:05 S 10 53 54.929 -35 38 33.04 V C57
2021-03-30 09:34:05 s 1 -187959.66 6 +203458.09 6010.0 C57
2021-03-30 09:44:05 S 10 53 55.078 -35 38 11.90 V C57
2021-03-30 09:44:05 s 1 -188067.34 3 +202822.51 9760.0 C57
2021-03-30 09:54:05 S 10 53 55.133 -35 37 49.44 V C57
2021-03-30 09:54:05 s 1 -188173.77 1 +202185.58 1120.0 C57
2021-03-30 10:04:05 S 10 53 55.226 -35 37 30.07 V C57
2021-03-30 10:04:05 s 1 -188278.94 5 +201547.30 90.0 C57
2021-03-30 10:14:05 S 10 53 55.267 -35 37 07.10 V C57
2021-03-30 10:14:05 s 1 -188382.85 9 +200907.67 6650.0 C57
2021-03-30 10:24:05 S 10 53 55.248 -35 36 48.38 V C57
2021-03-30 10:24:05 s 1 -188485.50 6 +200266.69 790.0 C57
2021-03-30 10:34:05 S 10 53 55.140 -35 36 26.53 V C57
2021-03-30 10:34:05 s 1 -188586.88 1 +199624.36 2510.0 C57
2021-03-30 10:44:05 S 10 53 55.339 -35 36 07.42 V C57
2021-03-30 10:44:05 s 1 -188686.97 7 +198980.67 1780.0 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)