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
2023-10-14 06:23:40 C 00 35 16.019 -07 54 08.78 V V00
2023-10-14 06:31:36 C 00 35 15.112 -07 54 23.26 V V00
2023-10-14 06:39:31 C 00 35 14.212 -07 54 37.66 V V00
2023-10-14 06:47:27 C 00 35 13.304 -07 54 52.13 V V00
2023-10-15 05:59:00 C 00 32 40.351 -08 37 43.21 V 703
2023-10-15 06:14:27 C 00 32 38.540 -08 38 11.87 V 703
2023-10-15 06:22:10 C 00 32 37.583 -08 38 26.88 V 703
2023-10-15 22:18:55 C 00 30 48.626 -09 08 11.00 V M22
2023-10-15 22:45:45 C 00 30 45.446 -09 09 02.52 V M22
2023-10-15 22:53:06 C 00 30 44.506 -09 09 16.31 V M22
2023-10-15 23:08:24 C 00 30 42.665 -09 09 45.32 V M22
2023-10-16 05:57:08 C 00 29 56.087 -09 23 17.52 V G96
2023-10-16 06:04:35 C 00 29 55.165 -09 23 31.92 V G96
2023-10-16 06:12:02 C 00 29 54.251 -09 23 46.46 V G96
2023-10-16 06:19:29 C 00 29 53.351 -09 24 00.72 V G96
2023-10-17 04:52:41 C 00 27 13.626 -10 08 06.72 V 703
2023-10-17 04:59:58 C 00 27 12.704 -10 08 20.76 V 703
2023-10-17 05:07:15 C 00 27 11.804 -10 08 35.34 V 703
2023-10-17 05:14:32 C 00 27 10.836 -10 08 49.92 V 703
2023-10-19 05:00:31 C 00 21 13.428 -11 46 05.48 V U52
2023-10-19 05:03:40 C 00 21 13.066 -11 46 12.40 V U52
2023-10-19 05:06:46 C 00 21 12.590 -11 46 18.30 V U52
2023-10-20 05:24:33 C 00 18 00.666 -12 37 38.68 V 703
2023-10-20 05:32:06 C 00 17 59.629 -12 37 54.91 V 703
2023-10-20 05:39:40 C 00 17 58.546 -12 38 10.18 V 703
2023-10-20 05:47:13 C 00 17 57.422 -12 38 26.45 V 703
2023-10-21 08:18:36 C 00 14 20.842 -13 35 55.25 X F51
2023-10-21 08:35:14 C 00 14 18.405 -13 36 31.87 X F51
2023-10-21 09:08:26 C 00 14 13.537 -13 37 44.74 X F51
2023-10-23 03:31:45 C 00 08 10.900 -15 12 50.51 V 703
2023-10-23 03:39:29 C 00 08 09.748 -15 13 07.90 V 703
2023-10-23 03:47:14 C 00 08 08.545 -15 13 25.68 V 703
2023-10-23 03:54:58 C 00 08 07.372 -15 13 43.93 V 703
2023-11-04 03:35:35 C 23 16 48.392 -27 16 06.06 V 703
2023-11-04 03:43:21 C 23 16 46.643 -27 16 26.47 V 703
2023-11-04 03:51:07 C 23 16 44.854 -27 16 47.96 V 703
2023-11-04 03:58:53 C 23 16 43.176 -27 17 08.63 V 703
2023-11-05 01:54:30 C 23 11 57.458 -28 15 13.90 V W68
2023-11-05 01:58:34 C 23 11 56.563 -28 15 25.06 V W68
2023-11-05 02:06:09 C 23 11 54.706 -28 15 44.82 V W68
2023-11-05 02:20:36 C 23 11 51.442 -28 16 23.66 V W68
2023-11-06 02:52:45 C 23 06 23.141 -29 22 45.48 V 703
2023-11-06 03:00:43 C 23 06 21.287 -29 23 07.48 V 703
2023-11-06 03:08:41 C 23 06 19.328 -29 23 28.43 V 703
2023-11-06 03:16:39 C 23 06 17.514 -29 23 50.89 V 703
2023-11-09 19:44:11 C 22 44 50.587 -33 20 46.50 V M22
2023-11-09 19:48:56 C 22 44 49.289 -33 20 59.06 V M22
2023-11-09 19:56:45 C 22 44 47.230 -33 21 19.73 V M22
2023-11-09 20:11:22 C 22 44 43.356 -33 21 58.97 V M22
2024-06-01 09:55:47 C 17 24 15.023 -08 06 03.49 V V06