2012 HW1

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6613942101 ± 1.77e-07
Semi-major axis (a)1.0608222511 AU ± 1.84e-09
Inclination (i)49.57240706° ± 1.90e-05
Long. of Asc. Node (Ω)207.81030709° ± 4.23e-06
Arg. of Perihelion (ω)163.70405505° ± 6.26e-06
Mean Anomaly (M)65.63353683° ± 2.44e-05
Mean Motion (n)0.9020868359°/day ± 2.34e-09
Perihelion dist (q)0.35920056 AU ± 1.88e-07
Aphelion dist (Q)1.76244395 AU ± 1.88e-07
Orbital Period1.09260688 yr ± 2.84e-09
Physical Parameters
H (abs. magnitude)20.03
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.232″
Uncertainty0
Orbit TypeApollo
MOID0.396605 AU
Observations Used132
Oppositions1
Arc Total2012-2025
First Observation Used2012-04-17
Last Observation Used2025-05-01
Observations (154)
Date Type RA Dec Mag Band Observatory
2012-04-17 09:36:44 C 15 31 28.70 +04 23 16.1 r 703
2012-04-17 09:45:29 C 15 31 27.87 +04 23 43.5 r 703
2012-04-17 09:54:23 C 15 31 27.01 +04 24 14.7 r 703
2012-04-17 10:03:15 C 15 31 26.18 +04 24 45.4 r 703
2012-04-17 10:40:30 C 15 31 22.24 +04 26 48.0 r 703
2012-04-17 10:43:02 C 15 31 21.91 +04 26 57.3 r 703
2012-04-17 10:45:33 C 15 31 21.70 +04 27 07.3 r 703
2012-04-17 10:48:00 C 15 31 21.43 +04 27 14.9 r 703
2012-04-18 07:00:33 C 15 29 19.32 +05 36 33.7 c 926
2012-04-18 07:01:37 C 15 29 19.34 +05 36 37.4 c 926
2012-04-18 07:02:40 C 15 29 19.11 +05 36 40.8 c 926
2012-04-18 07:03:44 C 15 29 19.04 +05 36 44.4 c 926
2012-04-18 07:11:09 C 15 29 17.91 +05 37 06.7 u H36
2012-04-18 07:24:42 C 15 29 16.79 +05 37 56.8 c 926
2012-04-18 07:25:45 C 15 29 16.65 +05 38 00.2 c 926
2012-04-18 07:26:49 C 15 29 16.62 +05 38 04.0 c 926
2012-04-18 07:27:52 C 15 29 16.46 +05 38 08.1 c 926
2012-04-18 07:33:46 C 15 29 15.52 +05 38 26.4 u H36
2012-04-18 07:56:24 C 15 29 12.92 +05 39 42.9 u H36
2012-04-18 08:18:52 C 15 29 10.66 +05 41 02.7 u H36
2012-04-18 08:41:28 C 15 29 08.06 +05 42 20.8 t H21
2012-04-18 08:48:31 C 15 29 07.30 +05 42 45.3 t H21
2012-04-18 09:12:27 C 15 29 04.99 +05 44 11.0 r 703
2012-04-18 09:15:48 C 15 29 04.66 +05 44 23.0 r 703
2012-04-18 09:19:11 C 15 29 04.23 +05 44 34.7 r 703
2012-04-18 09:22:34 C 15 29 03.87 +05 44 46.9 r 703
2012-04-18 10:42:54 C 15 28 55.18 +05 49 25.3 o H01
2012-04-18 10:52:07 C 15 28 54.18 +05 49 57.6 o H01
2012-04-18 11:01:36 C 15 28 53.15 +05 50 30.6 o H01
2012-04-18 11:16:48 C 15 28 51.49 +05 51 23.5 o H01
2012-04-18 14:50:53 C 15 28 29.43 +06 04 14.3 o 474
2012-04-18 15:01:02 C 15 28 28.32 +06 04 49.6 o 474
2012-04-19 04:30:06 C 15 27 01.91 +06 52 25.8 u 821
2012-04-19 04:33:01 C 15 27 01.57 +06 52 36.3 u 821
2012-04-19 04:35:49 C 15 27 01.26 +06 52 46.2 u 821
2012-04-19 04:38:49 C 15 27 00.92 +06 52 56.8 u 821
2012-04-19 04:40:34 C 15 27 00.72 +06 53 03.1 u 821
2012-04-19 04:41:26 C 15 27 00.61 +06 53 06.0 u 821
2012-04-19 04:42:13 C 15 27 00.53 +06 53 08.7 u 821
2012-04-19 07:16:15 C 15 26 43.55 +07 01 57.8 u H36
2012-04-19 07:21:57 C 15 26 42.83 +07 02 18.5 u H36
2012-04-19 07:33:27 C 15 26 41.37 +07 03 01.6 u H36
2012-04-19 08:53:13 C 15 26 32.71 +07 07 46.3 r 703
2012-04-19 09:03:15 C 15 26 31.57 +07 08 22.5 r 703
2012-04-19 09:13:28 C 15 26 30.40 +07 08 59.0 r 703
2012-04-19 13:53:22 C 15 25 59.61 +07 26 06.1 o 474
2012-04-19 14:02:30 C 15 25 58.45 +07 26 38.4 o 474
2012-04-19 14:05:32 C 15 25 58.16 +07 26 49.0 o 474
2012-04-20 01:53:20 C 15 24 38.17 +08 09 08.2 u J95
2012-04-20 01:58:22 C 15 24 37.59 +08 09 26.4 u J95