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
2021-01-25 12:44:07 S 06 00 24.026 -77 54 16.88 V C57
2021-01-25 12:44:07 s 1 -190030.37 6 +100212.10 1770.0 C57
2021-01-28 04:34:07 S 07 17 28.332 -76 47 32.28 V C57
2021-01-28 04:34:07 s 1 +143899.61 4 +59630.955 6970.0 C57
2021-01-28 04:44:07 S 07 17 38.191 -76 47 37.43 V C57
2021-01-28 04:44:07 s 1 +144182.62 7 +60692.189 8790.0 C57
2021-01-28 05:24:07 S 07 18 16.692 -76 47 57.70 V C57
2021-01-28 05:24:07 s 1 +145263.38 8 +64915.139 2680.0 C57
2021-01-28 05:34:07 S 07 18 24.156 -76 47 56.83 V C57
2021-01-28 05:34:07 s 1 +145521.02 4 +65965.332 8280.0 C57
2021-01-28 05:44:07 S 07 18 34.906 -76 48 08.24 V C57
2021-01-28 05:44:07 s 1 +145773.74 4 +67013.291 4930.0 C57
2021-01-28 05:54:07 S 07 18 43.829 -76 48 15.98 V C57
2021-01-28 05:54:07 s 1 +146021.60 1 +68059.006 2720.0 C57
2021-01-28 06:04:07 S 07 18 53.952 -76 48 12.92 V C57
2021-01-28 06:04:07 s 1 +146264.64 3 +69102.471 1730.0 C57
2021-01-28 06:14:07 S 07 19 04.130 -76 48 21.35 V C57
2021-01-28 06:14:07 s 1 +146502.92 2 +70143.679 2070.0 C57
2021-01-28 06:24:07 S 07 19 13.968 -76 48 21.28 V C57
2021-01-28 06:24:07 s 1 +146736.48 7 +71182.623 3810.0 C57
2021-01-28 06:34:07 S 07 19 21.178 -76 48 22.68 V C57
2021-01-28 06:34:07 s 1 +146965.38 6 +72219.297 7050.0 C57
2021-01-28 06:44:07 S 07 19 31.094 -76 48 23.36 V C57
2021-01-28 06:44:07 s 1 +147189.66 9 +73253.696 1880.0 C57
2021-01-28 06:54:07 S 07 19 38.662 -76 48 34.16 V C57
2021-01-28 06:54:07 s 1 +147409.38 2 +74285.814 8370.0 C57
2021-01-28 07:14:07 S 07 19 59.119 -76 48 46.12 V C57
2021-01-28 07:14:07 s 1 +147835.28 5 +76343.189 6710.0 C57
2021-01-28 07:24:07 S 07 20 09.211 -76 48 51.12 V C57
2021-01-28 07:24:07 s 1 +148041.56 8 +77368.436 8720.0 C57
2021-01-28 07:34:07 S 07 20 17.921 -76 48 58.32 V C57
2021-01-28 07:34:07 s 1 +148243.46 4 +78391.385 2740.0 C57
2021-01-28 07:44:07 S 07 20 28.690 -76 49 00.48 V C57
2021-01-28 07:44:07 s 1 +148441.01 9 +79412.031 8830.0 C57
2021-01-28 07:54:07 S 07 20 36.871 -76 49 03.97 V C57
2021-01-28 07:54:07 s 1 +148634.27 7 +80430.372 7090.0 C57
2021-01-28 08:04:07 S 07 20 46.262 -76 49 04.84 V C57
2021-01-28 08:04:07 s 1 +148823.28 0 +81446.404 7590.0 C57
2021-01-28 08:14:07 S 07 20 55.409 -76 49 11.93 V C57
2021-01-28 08:14:07 s 1 +149008.07 1 +82460.124 400.0 C57
2021-01-28 08:24:07 S 07 21 03.706 -76 49 18.41 V C57
2021-01-28 08:24:07 s 1 +149188.69 2 +83471.530 5610.0 C57
2021-01-28 08:34:07 S 07 21 13.205 -76 49 21.65 V C57
2021-01-28 08:34:07 s 1 +149365.18 5 +84480.621 3290.0 C57
2021-01-28 08:44:07 S 07 21 21.962 -76 49 25.50 V C57
2021-01-28 08:44:07 s 1 +149537.59 1 +85487.393 3510.0 C57
2021-01-28 08:54:07 S 07 21 31.555 -76 49 27.44 V C57
2021-01-28 08:54:07 s 1 +149705.95 1 +86491.845 6350.0 C57
2021-01-28 09:04:07 S 07 21 39.866 -76 49 32.41 V C57
2021-01-28 09:04:07 s 1 +149870.30 3 +87493.976 1870.0 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)