2012 HL

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5201652917 ± 1.81e-08
Semi-major axis (a)2.0941036759 AU ± 9.10e-09
Inclination (i)9.26935770° ± 5.28e-06
Long. of Asc. Node (Ω)210.16778144° ± 4.86e-06
Arg. of Perihelion (ω)40.64219983° ± 1.23e-05
Mean Anomaly (M)162.65126510° ± 1.24e-05
Mean Motion (n)0.3252482792°/day ± 2.12e-09
Perihelion dist (q)1.00482363 AU ± 3.82e-08
Aphelion dist (Q)3.18338373 AU ± 4.04e-08
Orbital Period3.03038124 yr ± 1.98e-08
Physical Parameters
H (abs. magnitude)22.58
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.404″
Uncertainty0
Orbit TypeApollo
MOID0.052316 AU
Observations Used229
Radar Obs Used3
Oppositions1
Arc Total2012-2018
First Observation Used2012-04-16
Last Observation Used2018-08-04
Observations (247)
Date Type RA Dec Mag Band Observatory
2012-04-16 06:16:47 C 12 01 14.48 -10 08 08.7 r 703
2012-04-16 06:24:47 C 12 01 14.84 -10 07 49.5 r 703
2012-04-16 06:32:51 C 12 01 15.16 -10 07 30.7 r 703
2012-04-16 06:40:58 C 12 01 15.49 -10 07 09.7 r 703
2012-04-16 07:17:44 C 12 01 17.07 -10 05 40.3 r 703
2012-04-16 07:24:56 C 12 01 17.25 -10 05 23.0 r 703
2012-04-16 07:32:10 C 12 01 17.61 -10 05 06.2 r 703
2012-04-16 07:39:30 C 12 01 17.90 -10 04 48.6 r 703
2012-04-16 12:18:38 C 12 01 36.15 -09 52 17.8 r E12
2012-04-16 12:24:21 C 12 01 36.38 -09 52 03.2 r E12
2012-04-16 21:16:05 C 12 02 09.32 -09 31 14.3 v I93
2012-04-16 21:23:53 C 12 02 09.69 -09 30 54.7 v I93
2012-04-16 21:34:14 C 12 02 10.16 -09 30 28.2 v I93
2012-04-16 21:42:01 C 12 02 10.54 -09 30 08.3 v I93
2012-04-17 00:16:19 C 12 02 22.27 -09 22 10.5 o 807
2012-04-17 00:21:29 C 12 02 22.51 -09 21 57.3 o 807
2012-04-17 00:26:39 C 12 02 22.76 -09 21 44.3 o 807
2012-04-17 03:10:23 C 12 02 32.84 -09 15 53.1 o G48
2012-04-17 03:14:02 C 12 02 33.11 -09 15 42.9 o G48
2012-04-17 03:17:40 C 12 02 33.20 -09 15 34.7 o G48
2012-04-17 03:20:01 C 12 02 32.41 -09 15 35.2 u H36
2012-04-17 03:21:23 C 12 02 33.50 -09 15 24.9 o G48
2012-04-17 03:24:41 C 12 02 32.63 -09 15 23.5 u H36
2012-04-17 03:25:05 C 12 02 33.54 -09 15 14.8 o G48
2012-04-17 03:28:43 C 12 02 33.80 -09 15 05.2 o G48
2012-04-17 03:29:13 C 12 02 32.86 -09 15 11.8 u H36
2012-04-17 03:33:42 C 12 02 33.11 -09 15 00.1 u H36
2012-04-17 06:23:13 C 12 02 40.76 -09 07 37.1 r H21
2012-04-17 06:28:15 C 12 02 41.04 -09 07 24.0 r H21
2012-04-17 06:33:48 C 12 02 41.31 -09 07 09.0 r H21
2012-04-17 23:13:11 C 12 03 54.27 -08 20 41.4 o 807
2012-04-17 23:21:35 C 12 03 54.78 -08 20 18.2 o 807
2012-04-17 23:29:56 C 12 03 55.27 -08 19 55.1 o 807
2012-04-17 23:37:33 C 12 03 55.74 -08 19 34.2 o 807
2012-04-18 23:15:18 C 12 05 41.76 -07 10 36.5 o 807
2012-04-18 23:21:33 C 12 05 42.19 -07 10 17.7 o 807
2012-04-18 23:27:48 C 12 05 42.59 -07 09 58.7 o 807
2012-04-19 05:28:45 C 12 06 06.64 -06 52 54.9 u H21
2012-04-19 05:31:15 C 12 06 06.79 -06 52 46.9 u H21
2012-04-19 05:33:45 C 12 06 06.95 -06 52 39.2 u H21
2012-04-19 05:36:01 C 12 06 07.12 -06 52 32.2 u H21
2012-04-19 05:38:17 C 12 06 07.26 -06 52 24.9 u H21
2012-04-19 05:40:33 C 12 06 07.41 -06 52 18.0 u H21
2012-04-19 09:10:22 C 12 06 27.89 -06 39 36.9 o 474
2012-04-19 09:11:23 C 12 06 27.94 -06 39 33.4 o 474
2012-04-19 09:12:23 C 12 06 28.04 -06 39 30.2 o 474
2012-04-19 09:13:24 C 12 06 28.11 -06 39 27.2 o 474
2012-04-19 09:14:24 C 12 06 28.17 -06 39 23.9 o 474
2012-04-19 09:15:26 C 12 06 28.24 -06 39 20.4 o 474
2012-04-20 07:29:51 C 12 08 21.43 -05 27 40.8 19.5 c 704
Radar Observations (3)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2012-04-30 03:19:00 86208.7414 1.5 Hz 2380 -1 -1
2012-04-30 03:34:00 65521821.75 8 us 2380 -1 -1
2012-05-01 02:38:00 78259.2097 0.4 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)