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
2021-03-28 23:34:06 S 10 53 32.417 -36 47 06.40 V C57
2021-03-28 23:34:06 s 1 -146257.63 6 +306748.42 740.0 C57
2021-03-28 23:44:05 S 10 53 32.570 -36 46 46.02 V C57
2021-03-28 23:44:05 s 1 -146534.52 8 +306362.41 4830.0 C57
2021-03-28 23:54:06 S 10 53 32.846 -36 46 26.36 V C57
2021-03-28 23:54:06 s 1 -146810.88 2 +305975.28 7920.0 C57
2021-03-29 00:04:05 S 10 53 32.861 -36 46 07.21 V C57
2021-03-29 00:04:05 s 1 -147086.69 5 +305587.03 9990.0 C57
2021-03-29 00:14:06 S 10 53 32.938 -36 45 46.44 V C57
2021-03-29 00:14:06 s 1 -147361.96 7 +305197.66 1050.0 C57
2021-03-29 00:24:05 S 10 53 33.194 -36 45 29.38 V C57
2021-03-29 00:24:05 s 1 -147636.69 4 +304807.16 1100.0 C57
2021-03-29 00:34:06 S 10 53 33.252 -36 45 07.38 V C57
2021-03-29 00:34:06 s 1 -147910.87 5 +304415.53 120.0 C57
2021-03-29 00:44:06 S 10 53 33.545 -36 44 48.26 V C57
2021-03-29 00:44:06 s 1 -148184.50 7 +304022.78 8110.0 C57
2021-03-29 00:54:06 S 10 53 33.749 -36 44 29.62 V C57
2021-03-29 00:54:06 s 1 -148457.58 9 +303628.90 5080.0 C57
2021-03-29 01:04:06 S 10 53 33.886 -36 44 08.20 V C57
2021-03-29 01:04:06 s 1 -148730.11 8 +303233.90 1010.0 C57
2021-03-29 01:14:05 S 10 53 34.097 -36 43 49.08 V C57
2021-03-29 01:14:05 s 1 -149002.09 2 +302837.77 5900.0 C57
2021-03-29 01:24:06 S 10 53 34.248 -36 43 28.88 V C57
2021-03-29 01:24:06 s 1 -149273.51 0 +302440.51 9750.0 C57
2021-03-29 01:34:05 S 10 53 34.459 -36 43 10.02 V C57
2021-03-29 01:34:05 s 1 -149544.36 9 +302042.11 2550.0 C57
2021-03-29 01:44:06 S 10 53 34.464 -36 42 50.47 V C57
2021-03-29 01:44:06 s 1 -149814.66 6 +301642.59 4310.0 C57
2021-03-29 01:54:05 S 10 53 34.639 -36 42 31.36 V C57
2021-03-29 01:54:05 s 1 -150084.40 0 +301241.94 5000.0 C57
2021-03-29 02:04:06 S 10 53 34.836 -36 42 11.02 V C57
2021-03-29 02:04:06 s 1 -150353.56 9 +300840.15 4640.0 C57
2021-03-29 02:14:06 S 10 53 35.093 -36 41 51.68 V C57
2021-03-29 02:14:06 s 1 -150622.17 0 +300437.23 3220.0 C57
2021-03-29 02:24:06 S 10 53 35.323 -36 41 31.88 V C57
2021-03-29 02:24:06 s 1 -150890.20 1 +300033.18 720.0 C57
2021-03-29 02:34:06 S 10 53 35.244 -36 41 09.38 V C57
2021-03-29 02:34:06 s 1 -151157.66 1 +299627.99 7160.0 C57
2021-03-29 02:44:05 S 10 53 35.371 -36 40 51.17 V C57
2021-03-29 02:44:05 s 1 -151424.54 6 +299221.67 2520.0 C57
2021-03-29 02:54:06 S 10 53 35.350 -36 40 32.52 V C57
2021-03-29 02:54:06 s 1 -151690.85 5 +298814.21 6800.0 C57
2021-03-29 03:04:05 S 10 53 35.378 -36 40 09.91 V C57
2021-03-29 03:04:05 s 1 -151956.58 5 +298405.61 9990.0 C57
2021-03-29 03:14:06 S 10 53 35.858 -36 39 51.19 V C57
2021-03-29 03:14:06 s 1 -152221.73 4 +297995.88 2100.0 C57
2021-03-29 03:24:05 S 10 53 36.048 -36 39 33.01 V C57
2021-03-29 03:24:05 s 1 -152486.30 1 +297585.01 3120.0 C57
2021-03-29 03:34:06 S 10 53 36.173 -36 39 13.10 V C57
2021-03-29 03:34:06 s 1 -152750.28 2 +297172.99 3030.0 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)