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 19:44:05 S 10 53 57.802 -35 17 06.90 V C57
2021-03-30 19:44:05 s 1 -192008.19 3 +162172.63 4410.0 C57
2021-03-30 20:04:05 S 10 53 57.804 -35 16 26.04 V C57
2021-03-30 20:04:05 s 1 -192044.72 8 +160730.73 9490.0 C57
2021-03-30 20:14:05 S 10 53 57.991 -35 16 04.22 V C57
2021-03-30 20:14:05 s 1 -192060.44 6 +160007.63 7130.0 C57
2021-03-30 21:24:05 S 10 53 56.278 -35 13 42.89 V C57
2021-03-30 21:24:05 s 1 -192121.99 9 +154905.92 7550.0 C57
2021-03-30 21:34:05 S 10 53 58.202 -35 13 09.80 V C57
2021-03-30 21:34:05 s 1 -192123.75 6 +154171.36 8380.0 C57
2021-03-30 21:54:05 S 10 53 57.998 -35 12 27.86 V C57
2021-03-30 21:54:05 s 1 -192121.89 4 +152697.94 9700.0 C57
2021-03-30 22:04:05 S 10 53 58.097 -35 12 06.55 V C57
2021-03-30 22:04:05 s 1 -192118.25 7 +151959.07 160.0 C57
2021-03-30 22:14:05 S 10 53 58.188 -35 11 43.33 V C57
2021-03-30 22:14:05 s 1 -192112.80 2 +151218.77 7130.0 C57
2021-03-30 22:24:05 S 10 53 58.157 -35 11 22.70 V C57
2021-03-30 22:24:05 s 1 -192105.51 9 +150477.02 590.0 C57
2021-03-30 22:34:05 S 10 53 58.169 -35 11 01.39 V C57
2021-03-30 22:34:05 s 1 -192096.39 9 +149733.82 510.0 C57
2021-03-30 22:44:05 S 10 53 58.219 -35 10 39.94 V C57
2021-03-30 22:44:05 s 1 -192085.43 1 +148989.19 6880.0 C57
2021-03-30 23:04:05 S 10 53 58.258 -35 09 56.05 V C57
2021-03-30 23:04:05 s 1 -192057.90 9 +147495.59 8880.0 C57
2021-03-30 23:14:05 S 10 53 58.301 -35 09 34.78 V C57
2021-03-30 23:14:05 s 1 -192041.33 5 +146746.62 4470.0 C57
2021-03-30 23:24:05 S 10 53 58.387 -35 09 13.75 V C57
2021-03-30 23:24:05 s 1 -192022.87 1 +145996.21 6420.0 C57
2021-03-30 23:34:05 S 10 53 58.390 -35 08 51.97 V C57
2021-03-30 23:34:05 s 1 -192002.50 7 +145244.34 4720.0 C57
2021-03-30 23:44:05 S 10 53 58.514 -35 08 30.08 V C57
2021-03-30 23:44:05 s 1 -191980.23 3 +144491.03 9350.0 C57
2021-03-30 23:54:05 S 10 53 58.476 -35 08 09.71 V C57
2021-03-30 23:54:05 s 1 -191956.03 7 +143736.28 280.0 C57
2021-03-31 00:04:05 S 10 53 58.474 -35 07 48.54 V C57
2021-03-31 00:04:05 s 1 -191929.90 8 +142980.07 7490.0 C57
2021-03-31 00:14:05 S 10 53 58.310 -35 07 26.36 V C57
2021-03-31 00:14:05 s 1 -191901.83 7 +142222.41 960.0 C57
2021-03-31 00:24:05 S 10 53 58.591 -35 07 04.01 V C57
2021-03-31 00:24:05 s 1 -191871.81 1 +141463.30 670.0 C57
2021-03-31 00:34:05 S 10 53 58.298 -35 06 41.22 V C57
2021-03-31 00:34:05 s 1 -191839.81 9 +140702.74 6600.0 C57
2021-03-31 00:44:05 S 10 53 58.627 -35 06 21.82 V C57
2021-03-31 00:44:05 s 1 -191805.85 1 +139940.73 8720.0 C57
2021-03-31 00:54:05 S 10 53 58.603 -35 05 58.16 V C57
2021-03-31 00:54:05 s 1 -191769.89 5 +139177.26 7020.0 C57
2021-03-31 01:04:05 S 10 53 58.502 -35 05 36.20 V C57
2021-03-31 01:04:05 s 1 -191731.94 0 +138412.34 1470.0 C57
2021-03-31 01:14:05 S 10 53 58.517 -35 05 14.21 V C57
2021-03-31 01:14:05 s 1 -191691.97 4 +137645.97 2050.0 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)