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
2021-03-23 09:14:06 S 10 47 55.306 -40 56 30.34 V C57
2021-03-23 09:14:06 s 1 +132919.25 2 +272934.68 5460.0 C57
2021-03-23 09:24:06 S 10 47 56.177 -40 56 12.41 V C57
2021-03-23 09:24:06 s 1 +132642.81 1 +273436.12 570.0 C57
2021-03-23 09:34:06 S 10 47 56.873 -40 55 54.88 V C57
2021-03-23 09:34:06 s 1 +132365.69 6 +273936.16 4270.0 C57
2021-03-23 09:44:06 S 10 47 57.634 -40 55 36.34 V C57
2021-03-23 09:44:06 s 1 +132087.91 0 +274434.81 6590.0 C57
2021-03-23 09:54:06 S 10 47 58.524 -40 55 19.16 V C57
2021-03-23 09:54:06 s 1 +131809.45 8 +274932.07 7530.0 C57
2021-03-23 10:04:06 S 10 47 59.251 -40 55 00.23 V C57
2021-03-23 10:04:06 s 1 +131530.34 4 +275427.95 7100.0 C57
2021-03-23 10:14:06 S 10 48 00.024 -40 54 43.52 V C57
2021-03-23 10:14:06 s 1 +131250.56 9 +275922.43 5300.0 C57
2021-03-23 10:24:06 S 10 48 00.682 -40 54 24.70 V C57
2021-03-23 10:24:06 s 1 +130970.13 8 +276415.54 2140.0 C57
2021-03-23 10:34:06 S 10 48 01.654 -40 54 07.24 V C57
2021-03-23 10:34:06 s 1 +130689.05 4 +276907.26 7630.0 C57
2021-03-23 10:44:06 S 10 48 02.405 -40 53 47.58 V C57
2021-03-23 10:44:06 s 1 +130407.32 1 +277397.60 1770.0 C57
2021-03-23 10:54:06 S 10 48 03.050 -40 53 31.24 V C57
2021-03-23 10:54:06 s 1 +130124.94 3 +277886.57 4570.0 C57
2021-03-23 11:14:06 S 10 48 04.490 -40 52 55.45 V C57
2021-03-23 11:14:06 s 1 +129558.26 0 +278860.37 6180.0 C57
2021-03-23 11:24:06 S 10 48 05.177 -40 52 36.37 V C57
2021-03-23 11:24:06 s 1 +129273.96 4 +279345.21 5010.0 C57
2021-03-23 11:34:06 S 10 48 06.019 -40 52 17.40 V C57
2021-03-23 11:34:06 s 1 +128989.03 4 +279828.68 2520.0 C57
2021-03-23 11:44:06 S 10 48 06.730 -40 51 58.50 V C57
2021-03-23 11:44:06 s 1 +128703.47 6 +280310.77 8730.0 C57
2021-03-23 11:54:06 S 10 48 07.375 -40 51 43.16 V C57
2021-03-23 11:54:06 s 1 +128417.29 1 +280791.50 3630.0 C57
2021-03-23 12:04:06 S 10 48 08.174 -40 51 21.78 V C57
2021-03-23 12:04:06 s 1 +128130.48 4 +281270.87 7240.0 C57
2021-03-23 12:14:06 S 10 48 08.947 -40 51 05.11 V C57
2021-03-23 12:14:06 s 1 +127843.05 7 +281748.87 9570.0 C57
2021-03-23 12:24:06 S 10 48 09.581 -40 50 46.32 V C57
2021-03-23 12:24:06 s 1 +127555.01 5 +282225.51 620.0 C57
2021-03-23 12:34:06 S 10 48 10.411 -40 50 28.14 V C57
2021-03-23 12:34:06 s 1 +127266.35 9 +282700.78 390.0 C57
2021-03-23 12:44:06 S 10 48 11.160 -40 50 10.90 V C57
2021-03-23 12:44:06 s 1 +126977.09 3 +283174.70 8890.0 C57
2021-03-23 12:54:06 S 10 48 11.846 -40 49 53.33 V C57
2021-03-23 12:54:06 s 1 +126687.22 0 +283647.26 6130.0 C57
2021-03-23 13:04:06 S 10 48 12.612 -40 49 35.98 V C57
2021-03-23 13:04:06 s 1 +126396.74 4 +284118.47 2120.0 C57
2021-03-23 13:14:06 S 10 48 13.498 -40 49 18.37 V C57
2021-03-23 13:14:06 s 1 +126105.66 8 +284588.32 6860.0 C57
2021-03-23 13:24:06 S 10 48 14.263 -40 48 57.78 V C57
2021-03-23 13:24:06 s 1 +125813.99 5 +285056.82 360.0 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)