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
2021-03-09 19:04:05 s 1 +141374.89 8 +230865.13 8500.0 C57
2021-03-09 19:14:05 S 10 32 41.095 -51 58 54.80 V C57
2021-03-09 19:14:05 s 1 +141157.68 2 +231486.49 6930.0 C57
2021-03-09 19:24:05 S 10 32 42.149 -51 58 40.62 V C57
2021-03-09 19:24:05 s 1 +140939.46 4 +232106.21 3250.0 C57
2021-03-09 19:34:05 S 10 32 43.142 -51 58 24.28 V C57
2021-03-09 19:34:05 s 1 +140720.24 9 +232724.29 7450.0 C57
2021-03-09 19:44:05 S 10 32 44.532 -51 58 04.58 V C57
2021-03-09 19:44:05 s 1 +140500.04 4 +233340.74 9560.0 C57
2021-03-09 19:54:05 S 10 32 45.137 -51 57 49.64 V C57
2021-03-09 19:54:05 s 1 +140278.85 5 +233955.56 9580.0 C57
2021-03-09 20:04:05 S 10 32 46.658 -51 57 36.04 V C57
2021-03-09 20:04:05 s 1 +140056.68 7 +234568.76 7530.0 C57
2021-03-09 20:14:05 S 10 32 47.376 -51 57 21.13 V C57
2021-03-09 20:14:05 s 1 +139833.54 7 +235180.33 3420.0 C57
2021-03-09 20:24:05 S 10 32 48.502 -51 57 02.99 V C57
2021-03-09 20:24:05 s 1 +139609.44 0 +235790.28 7250.0 C57
2021-03-09 20:34:05 S 10 32 49.788 -51 56 51.68 V C57
2021-03-09 20:34:05 s 1 +139384.37 1 +236398.61 9050.0 C57
2021-03-09 20:44:05 S 10 32 50.321 -51 56 35.63 V C57
2021-03-09 20:44:05 s 1 +139158.34 8 +237005.32 8820.0 C57
2021-03-09 21:04:05 S 10 32 52.658 -51 55 57.97 V C57
2021-03-09 21:04:05 s 1 +138703.45 6 +238213.91 2330.0 C57
2021-03-09 21:24:05 S 10 32 54.446 -51 55 29.17 V C57
2021-03-09 21:24:05 s 1 +138244.81 1 +239416.08 7860.0 C57
2021-03-09 21:34:05 S 10 32 55.493 -51 55 15.42 V C57
2021-03-09 21:34:05 s 1 +138014.09 4 +240014.76 7660.0 C57
2021-03-09 21:44:05 S 10 32 56.856 -51 54 58.03 V C57
2021-03-09 21:44:05 s 1 +137782.45 6 +240611.84 5500.0 C57
2021-03-09 21:54:05 S 10 32 57.466 -51 54 46.84 V C57
2021-03-09 21:54:05 s 1 +137549.90 0 +241207.33 1400.0 C57
2021-03-09 22:04:05 S 10 32 58.766 -51 54 34.06 V C57
2021-03-09 22:04:05 s 1 +137316.43 4 +241801.22 5350.0 C57
2021-03-09 22:14:05 S 10 32 59.530 -51 54 16.56 V C57
2021-03-09 22:14:05 s 1 +137082.06 1 +242393.52 7380.0 C57
2021-03-09 22:24:05 S 10 33 00.540 -51 53 57.98 V C57
2021-03-09 22:24:05 s 1 +136846.78 9 +242984.24 7490.0 C57
2021-03-09 22:34:05 S 10 33 01.385 -51 53 42.11 V C57
2021-03-09 22:34:05 s 1 +136610.62 0 +243573.37 5690.0 C57
2021-03-09 22:44:05 S 10 33 02.880 -51 53 27.92 V C57
2021-03-09 22:44:05 s 1 +136373.56 2 +244160.92 2000.0 C57
2021-03-09 22:54:05 S 10 33 03.722 -51 53 15.04 V C57
2021-03-09 22:54:05 s 1 +136135.61 9 +244746.89 6420.0 C57
2021-03-09 23:04:05 S 10 33 04.682 -51 52 56.03 V C57
2021-03-09 23:04:05 s 1 +135896.79 6 +245331.29 8960.0 C57
2021-03-09 23:14:05 S 10 33 05.916 -51 52 40.55 V C57
2021-03-09 23:14:05 s 1 +135657.09 9 +245914.11 9640.0 C57
2021-03-09 23:24:05 S 10 33 06.622 -51 52 26.44 V C57
2021-03-09 23:24:05 s 1 +135416.53 2 +246495.36 8470.0 C57
2021-03-09 23:34:05 S 10 33 07.246 -51 52 10.42 V 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)