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
2001-09-25 07:31:37 C 00 21 29.18 -00 44 05.8 o 644
2001-09-25 08:01:58 C 00 21 26.87 -00 44 33.0 o 644
2001-09-25 08:32:34 C 00 21 24.61 -00 45 01.0 o 644
2001-10-16 03:50:07 C 23 34 50.78 -10 04 51.0 o 644
2001-10-16 04:20:28 C 23 34 47.34 -10 05 29.1 o 644
2001-10-16 04:50:43 C 23 34 44.00 -10 06 07.4 o 644
2001-10-24 02:26:47 C 23 14 08.27 -14 03 12.5 o 644
2001-10-24 02:57:47 C 23 14 04.76 -14 03 50.3 o 644
2001-10-24 03:30:48 C 23 14 01.04 -14 04 31.7 o 644
2012-09-17 08:32:59 C 00 43 40.08 +02 17 24.5 r G96
2012-09-17 08:46:20 C 00 43 39.39 +02 17 15.3 r G96
2012-09-17 08:59:40 C 00 43 38.74 +02 17 05.8 r G96
2012-09-17 09:13:01 C 00 43 38.06 +02 16 56.9 r G96
2012-09-17 10:00:39 C 00 43 35.65 +02 16 24.2 r G96
2012-09-17 10:13:02 C 00 43 35.07 +02 16 15.7 r G96
2012-09-17 10:25:29 C 00 43 34.39 +02 16 07.1 r G96
2012-09-17 10:37:54 C 00 43 33.81 +02 15 57.8 r G96
2012-09-18 02:19:39 C 00 42 48.43 +02 04 52.8 t 204
2012-09-18 02:55:38 C 00 42 46.60 +02 04 27.2 t 204
2012-09-18 06:15:08 C 00 42 37.46 +02 02 06.8 o H01
2012-09-18 06:20:21 C 00 42 37.19 +02 02 03.0 o H01
2012-09-18 06:34:08 C 00 42 36.46 +02 01 53.1 o H01
2012-09-18 06:47:49 C 00 42 35.73 +02 01 43.4 o H01
2012-09-18 10:34:42 C 00 42 23.73 +01 59 00.4 t 711
2012-09-18 10:43:37 C 00 42 23.26 +01 58 54.2 t 711
2012-09-18 10:52:31 C 00 42 22.80 +01 58 47.6 t 711
2012-09-18 13:29:01 C 00 42 15.46 +01 57 10.2 o 474
2012-09-18 13:34:04 C 00 42 15.23 +01 57 06.8 o 474
2012-09-18 13:39:08 C 00 42 14.96 +01 57 02.6 o 474
2012-09-18 13:44:12 C 00 42 14.70 +01 56 58.9 o 474
2012-09-19 00:15:28 C 00 41 42.78 +01 48 58.6 u J95
2012-09-19 00:25:44 C 00 41 42.17 +01 48 50.3 u J95
2012-09-19 04:52:46 C 00 41 28.64 +01 45 34.2 r H21
2012-09-19 05:01:43 C 00 41 28.14 +01 45 27.4 r H21
2012-09-19 05:13:12 C 00 41 27.53 +01 45 18.7 r H21
2012-09-19 06:04:48 C 00 41 24.92 +01 44 41.8 o H01
2012-09-19 06:12:35 C 00 41 24.49 +01 44 36.0 o H01
2012-09-19 06:23:56 C 00 41 23.87 +01 44 27.5 o H01
2012-09-19 06:45:27 C 00 41 22.68 +01 44 11.6 o H01
2012-09-19 06:51:12 C 00 41 22.30 +01 44 05.3 u H36
2012-09-19 07:04:35 C 00 41 21.50 +01 43 55.6 u H36
2012-09-19 07:17:58 C 00 41 20.78 +01 43 45.5 u H36
2012-09-20 06:10:25 C 00 40 07.91 +01 26 24.3 o H01
2012-09-20 06:21:36 C 00 40 07.26 +01 26 15.7 o H01
2012-09-20 06:31:32 C 00 40 06.69 +01 26 07.9 o H01
2012-09-20 06:38:28 C 00 40 06.35 +01 26 02.7 r G96
2012-09-20 06:39:16 C 00 40 06.30 +01 26 02.2 r G96
2012-09-20 06:40:05 C 00 40 06.22 +01 26 01.2 r G96
2012-09-20 06:40:27 C 00 40 06.18 +01 26 01.0 o H01
2012-09-20 06:40:52 C 00 40 06.24 +01 26 00.8 r G96