2012 ST9

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6628108819 ± 6.38e-08
Semi-major axis (a)1.9602271361 AU ± 2.87e-09
Inclination (i)7.69219746° ± 1.09e-05
Long. of Asc. Node (Ω)174.23974579° ± 3.20e-05
Arg. of Perihelion (ω)308.38912561° ± 3.27e-05
Mean Anomaly (M)247.58297462° ± 4.92e-06
Mean Motion (n)0.3591308229°/day ± 7.89e-10
Perihelion dist (q)0.66096726 AU ± 1.25e-07
Aphelion dist (Q)3.25948701 AU ± 1.25e-07
Orbital Period2.74447700 yr ± 6.03e-09
Physical Parameters
H (abs. magnitude)19.86
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.327″
Uncertainty0
Orbit TypeApollo
MOID0.065549 AU
Observations Used200
Oppositions15
Arc Total2001-2024
First Observation Used2001-09-25
Last Observation Used2024-06-01
Observations (202)
Date Type RA Dec Mag Band Observatory
2024-06-01 10:00:24 C 17 24 14.663 -08 06 03.53 V V06
2024-06-01 10:04:59 C 17 24 14.274 -08 06 03.17 V V06