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
2021-03-21 16:44:06 S 10 44 02.258 -42 11 45.24 V C57
2021-03-21 16:44:06 s 1 +166692.04 3 +104493.06 1810.0 C57
2021-03-21 16:54:06 S 10 44 03.446 -42 11 27.92 V C57
2021-03-21 16:54:06 s 1 +166776.32 5 +105399.02 9740.0 C57
2021-03-21 17:04:06 S 10 44 05.009 -42 11 04.92 V C57
2021-03-21 17:04:06 s 1 +166857.61 3 +106303.09 1780.0 C57
2021-03-21 17:14:06 S 10 44 06.214 -42 10 49.26 V C57
2021-03-21 17:14:06 s 1 +166935.93 0 +107205.26 7970.0 C57
2021-03-21 17:24:06 S 10 44 06.986 -42 10 28.09 V C57
2021-03-21 17:24:06 s 1 +167011.30 0 +108105.54 8370.0 C57
2021-03-21 17:34:06 S 10 44 08.249 -42 10 07.03 V C57
2021-03-21 17:34:06 s 1 +167083.74 4 +109003.92 3000.0 C57
2021-03-21 17:44:06 S 10 44 09.610 -42 09 46.94 V C57
2021-03-21 17:44:06 s 1 +167153.28 6 +109900.40 1930.0 C57
2021-03-21 17:54:06 S 10 44 10.709 -42 09 27.83 V C57
2021-03-21 17:54:06 s 1 +167219.94 7 +110794.99 5180.0 C57
2021-03-21 18:04:06 S 10 44 11.798 -42 09 07.96 V C57
2021-03-21 18:04:06 s 1 +167283.74 9 +111687.68 2810.0 C57
2021-03-21 18:14:06 S 10 44 12.972 -42 08 50.28 V C57
2021-03-21 18:14:06 s 1 +167344.71 5 +112578.48 4840.0 C57
2021-03-21 18:24:06 S 10 44 14.114 -42 08 29.36 V C57
2021-03-21 18:24:06 s 1 +167402.86 4 +113467.38 1330.0 C57
2021-03-21 18:34:06 S 10 44 15.317 -42 08 10.93 V C57
2021-03-21 18:34:06 s 1 +167458.22 0 +114354.38 2310.0 C57
2021-03-21 18:44:06 S 10 44 16.481 -42 07 51.24 V C57
2021-03-21 18:44:06 s 1 +167510.80 2 +115239.49 7830.0 C57
2021-03-21 18:54:06 S 10 44 17.772 -42 07 31.98 V C57
2021-03-21 18:54:06 s 1 +167560.63 1 +116122.70 7930.0 C57
2021-03-21 19:04:06 S 10 44 18.977 -42 07 12.94 V C57
2021-03-21 19:04:06 s 1 +167607.72 9 +117004.02 2630.0 C57
2021-03-21 19:14:06 S 10 44 20.218 -42 06 51.23 V C57
2021-03-21 19:14:06 s 1 +167652.11 5 +117883.44 1990.0 C57
2021-03-21 19:24:06 S 10 44 21.125 -42 06 34.34 V C57
2021-03-21 19:24:06 s 1 +167693.81 0 +118760.97 6050.0 C57
2021-03-21 19:34:06 S 10 44 22.546 -42 06 15.19 V C57
2021-03-21 19:34:06 s 1 +167732.83 4 +119636.60 4830.0 C57
2021-03-21 19:44:06 S 10 44 23.573 -42 05 54.85 V C57
2021-03-21 19:44:06 s 1 +167769.20 6 +120510.34 8390.0 C57
2021-03-21 19:54:06 S 10 44 24.734 -42 05 34.12 V C57
2021-03-21 19:54:06 s 1 +167802.94 7 +121382.19 6750.0 C57
2021-03-21 20:04:06 S 10 44 26.002 -42 05 17.12 V C57
2021-03-21 20:04:06 s 1 +167834.07 5 +122252.15 9950.0 C57
2021-03-21 20:14:06 S 10 44 26.957 -42 04 56.60 V C57
2021-03-21 20:14:06 s 1 +167862.61 1 +123120.21 8040.0 C57
2021-03-21 20:24:06 S 10 44 28.169 -42 04 37.63 V C57
2021-03-21 20:24:06 s 1 +167888.57 2 +123986.38 1040.0 C57
2021-03-21 20:34:06 S 10 44 29.467 -42 04 16.79 V C57
2021-03-21 20:34:06 s 1 +167911.97 8 +124850.67 9000.0 C57
2021-03-21 20:44:06 S 10 44 30.516 -42 03 59.08 V C57
2021-03-21 20:44:06 s 1 +167932.84 7 +125713.07 1940.0 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)