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
2012-09-20 08:55:49 C 00 39 58.23 +01 24 16.0 u H36
2012-09-20 09:04:39 C 00 39 57.69 +01 24 08.2 u H36
2012-09-20 09:13:30 C 00 39 57.19 +01 24 01.1 u H36
2012-09-20 10:24:32 C 00 39 53.22 +01 23 07.1 u 682
2012-09-20 10:55:34 C 00 39 51.52 +01 22 41.9 u 682
2012-09-20 11:27:41 C 00 39 49.60 +01 22 14.0 u 682
2012-09-21 05:24:54 C 00 38 50.31 +01 08 07.3 o 291
2012-09-21 05:27:42 C 00 38 50.16 +01 08 04.6 o 291
2012-09-21 05:29:14 C 00 38 50.10 +01 08 03.4 o 291
2012-09-21 05:45:48 C 00 38 48.82 +01 07 48.3 u H21
2012-09-21 05:58:11 C 00 38 48.04 +01 07 38.8 u H21
2012-09-21 06:14:35 C 00 38 47.01 +01 07 26.4 u H21
2012-09-22 05:23:34 C 00 37 26.50 +00 48 33.4 o 291
2012-09-22 05:26:16 C 00 37 26.30 +00 48 31.8 o 291
2012-09-22 05:27:45 C 00 37 26.23 +00 48 29.9 o 291
2012-09-23 08:17:33 C 00 35 47.43 +00 25 48.3 r G96
2012-09-23 08:26:42 C 00 35 46.89 +00 25 39.7 r G96
2012-09-23 08:32:53 C 00 35 46.46 +00 25 34.7 r G96
2012-09-23 08:37:45 C 00 35 46.17 +00 25 30.2 r G96
2012-09-24 04:53:43 C 00 34 29.29 +00 07 44.3 u H21
2012-09-24 04:59:16 C 00 34 28.91 +00 07 39.6 u H21
2012-09-24 05:04:48 C 00 34 28.53 +00 07 34.7 u H21
2012-09-24 05:10:54 C 00 34 28.14 +00 07 29.1 u H21
2012-09-25 04:54:15 C 00 32 54.54 -00 13 53.7 o 291
2012-09-25 04:55:41 C 00 32 54.45 -00 13 54.9 o 291
2012-09-25 04:57:05 C 00 32 54.36 -00 13 56.2 o 291
2012-09-26 08:41:55 C 00 30 59.12 -00 39 51.4 o 291
2012-09-26 08:43:10 C 00 30 59.01 -00 39 52.6 o 291
2012-09-26 08:44:25 C 00 30 58.89 -00 39 54.0 o 291
2012-10-03 07:12:42 C 00 17 47.61 -03 35 02.4 u 448
2012-10-03 07:41:19 C 00 17 44.98 -03 35 36.5 u 448
2012-10-03 08:10:05 C 00 17 42.31 -03 36 08.5 u 448
2012-10-14 06:17:57 C 23 51 22.69 -09 11 28.3 u 448
2012-10-14 06:43:46 C 23 51 19.73 -09 12 03.7 u 448
2012-10-14 07:09:51 C 23 51 16.74 -09 12 39.3 u 448
2012-10-22 11:52:10 C 23 28 29.90 -13 50 07.8 o 474
2012-10-22 11:55:13 C 23 28 29.53 -13 50 12.1 o 474
2012-10-22 11:58:15 C 23 28 29.13 -13 50 16.3 o 474
2012-10-29 23:58:13 C 23 06 58.25 -18 03 15.7 u 807
2012-10-30 00:02:21 C 23 06 57.75 -18 03 21.3 u 807
2012-10-30 00:06:27 C 23 06 57.24 -18 03 27.0 u 807
2012-10-30 00:10:35 C 23 06 56.72 -18 03 32.6 u 807
2012-10-30 00:18:58 C 23 06 55.67 -18 03 44.4 u 807
2012-10-30 23:59:16 C 23 04 06.63 -18 36 08.5 u 807
2012-10-31 00:03:13 C 23 04 06.13 -18 36 13.9 u 807
2012-10-31 00:07:19 C 23 04 05.62 -18 36 19.4 u 807
2012-10-31 00:11:36 C 23 04 05.08 -18 36 25.3 u 807
2012-10-31 00:15:33 C 23 04 04.60 -18 36 30.7 u 807
2012-11-21 00:21:37 C 22 05 52.40 -29 06 45.8 u 807
2012-11-21 00:26:54 C 22 05 51.74 -29 06 52.1 u 807