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
2021-01-29 04:04:07 S 07 37 03.710 -76 53 48.16 V C57
2021-01-29 04:04:07 s 1 +149619.91 7 +187073.95 2850.0 C57
2021-01-29 04:14:07 S 07 37 10.066 -76 53 52.62 V C57
2021-01-29 04:14:07 s 1 +149497.06 8 +187827.38 2190.0 C57
2021-01-29 04:24:07 S 07 37 17.251 -76 53 51.29 V C57
2021-01-29 04:24:07 s 1 +149372.69 7 +188578.89 8710.0 C57
2021-01-29 04:44:07 S 07 37 32.849 -76 53 54.96 V C57
2021-01-29 04:44:07 s 1 +149119.42 6 +190076.18 3430.0 C57
2021-01-29 05:04:07 S 07 37 46.466 -76 53 53.81 V C57
2021-01-29 05:04:07 s 1 +148860.19 1 +191565.84 7140.0 C57
2021-01-29 07:44:07 S 07 39 42.334 -76 53 56.90 V C57
2021-01-29 07:44:07 s 1 +146581.24 4 +203212.82 8560.0 C57
2021-01-29 07:54:07 S 07 39 49.061 -76 53 54.92 V C57
2021-01-29 07:54:07 s 1 +146427.22 4 +203925.03 390.0 C57
2021-01-29 08:04:07 S 07 39 56.124 -76 53 55.57 V C57
2021-01-29 08:04:07 s 1 +146271.89 5 +204635.41 9800.0 C57
2021-01-29 08:14:07 S 07 40 02.537 -76 53 56.72 V C57
2021-01-29 08:14:07 s 1 +146115.26 8 +205343.96 6810.0 C57
2021-01-29 08:24:07 S 07 40 09.694 -76 53 57.55 V C57
2021-01-29 08:24:07 s 1 +145957.35 0 +206050.70 1430.0 C57
2021-01-29 08:44:07 S 07 40 23.381 -76 53 56.47 V C57
2021-01-29 08:44:07 s 1 +145637.67 8 +207458.74 3600.0 C57
2021-01-29 08:54:07 S 07 40 30.535 -76 53 54.20 V C57
2021-01-29 08:54:07 s 1 +145475.94 0 +208160.05 1170.0 C57
2021-01-29 09:14:07 S 07 40 45.624 -76 53 51.65 V C57
2021-01-29 09:14:07 s 1 +145148.70 5 +209557.27 9350.0 C57
2021-01-29 09:24:07 S 07 40 51.192 -76 53 54.89 V C57
2021-01-29 09:24:07 s 1 +144983.22 4 +210253.18 0.0 C57
2021-01-29 09:44:07 S 07 41 05.964 -76 53 54.96 V C57
2021-01-29 09:44:07 s 1 +144648.57 7 +211639.65 4480.0 C57
2021-01-29 09:54:07 S 07 41 12.696 -76 53 54.89 V C57
2021-01-29 09:54:07 s 1 +144479.42 7 +212330.21 8340.0 C57
2021-01-29 10:04:07 S 07 41 19.529 -76 53 52.08 V C57
2021-01-29 10:04:07 s 1 +144309.06 9 +213018.99 9970.0 C57
2021-01-29 10:14:07 S 07 41 26.194 -76 53 52.87 V C57
2021-01-29 10:14:07 s 1 +144137.51 3 +213705.99 9380.0 C57
2021-01-29 10:24:07 S 07 41 33.029 -76 53 50.86 V C57
2021-01-29 10:24:07 s 1 +143964.76 5 +214391.22 6590.0 C57
2021-01-29 10:34:07 S 07 41 39.970 -76 53 51.32 V C57
2021-01-29 10:34:07 s 1 +143790.83 4 +215074.69 1610.0 C57
2021-01-29 10:44:07 S 07 41 46.058 -76 53 51.32 V C57
2021-01-29 10:44:07 s 1 +143615.72 7 +215756.40 4450.0 C57
2021-01-29 10:54:07 S 07 41 54.588 -76 53 49.99 V C57
2021-01-29 10:54:07 s 1 +143439.45 3 +216436.34 5130.0 C57
2021-01-29 11:04:07 S 07 42 00.206 -76 53 48.73 V C57
2021-01-29 11:04:07 s 1 +143262.01 8 +217114.53 3670.0 C57
2021-01-29 11:14:07 S 07 42 07.654 -76 53 49.20 V C57
2021-01-29 11:14:07 s 1 +143083.43 0 +217790.97 60.0 C57
2021-01-29 11:24:07 S 07 42 13.394 -76 53 49.52 V C57
2021-01-29 11:24:07 s 1 +142903.69 7 +218465.66 4340.0 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)