2012 US9

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2468718507 ± 3.36e-08
Semi-major axis (a)1.0929196104 AU ± 1.29e-09
Inclination (i)8.27641311° ± 3.13e-06
Long. of Asc. Node (Ω)334.65221319° ± 1.84e-05
Arg. of Perihelion (ω)182.97233823° ± 2.22e-05
Mean Anomaly (M)55.06633323° ± 1.89e-05
Mean Motion (n)0.8626407072°/day ± 1.53e-09
Perihelion dist (q)0.82310852 AU ± 3.67e-08
Aphelion dist (Q)1.36273070 AU ± 3.68e-08
Orbital Period1.14256871 yr ± 2.02e-09
Physical Parameters
H (abs. magnitude)21.85
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.218″
Uncertainty0
Orbit TypeApollo
MOID0.133513 AU
Observations Used149
Oppositions1
Arc Total2012-2021
First Observation Used2012-10-16
Last Observation Used2021-08-14
Observations (155)
Date Type RA Dec Mag Band Observatory
2021-08-11 10:17:46 C 21 09 07.53 -27 16 24.6 V 474
2021-08-11 10:20:48 C 21 09 07.09 -27 16 23.8 V 474
2021-08-14 09:15:27 C 20 59 27.751 -26 45 27.00 U F51
2021-08-14 09:30:28 C 20 59 25.672 -26 45 19.92 U F51
2021-08-14 09:45:25 C 20 59 23.583 -26 45 12.97 U F51