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
2012-04-20 07:45:44 C 12 08 22.68 -05 26 48.2 19.3 c 704
2012-04-20 08:01:33 C 12 08 23.83 -05 25 52.0 19.0 c 704
2012-04-20 08:17:21 C 12 08 25.08 -05 24 57.2 19.3 c 704
2012-04-20 23:10:31 C 12 09 58.56 -04 30 44.1 o 807
2012-04-20 23:17:54 C 12 09 59.19 -04 30 17.3 o 807
2012-04-20 23:25:16 C 12 09 59.83 -04 29 50.8 o 807
2012-04-20 23:32:31 C 12 10 00.49 -04 29 24.0 o 807
2012-04-21 04:07:23 C 12 10 26.21 -04 14 01.6 18.6 c 704
2012-04-21 04:23:08 C 12 10 27.42 -04 13 02.8 19.4 c 704
2012-04-21 04:39:25 C 12 10 28.79 -04 12 02.6 18.7 c 704
2012-04-21 04:55:10 C 12 10 30.11 -04 11 03.8 18.9 c 704
2012-04-21 05:11:32 C 12 10 31.44 -04 10 03.1 19.0 c 704
2012-04-22 02:06:32 C 12 12 48.59 -02 47 08.5 V I08
2012-04-22 03:39:15 C 12 12 57.76 -02 40 48.9 V I08
2012-04-23 04:23:51 C 12 16 00.55 -00 56 50.3 u H21
2012-04-23 04:26:55 C 12 16 00.88 -00 56 36.4 u H21
2012-04-23 04:29:58 C 12 16 01.20 -00 56 22.7 u H21
2012-04-23 04:32:38 C 12 16 01.51 -00 56 10.7 u H21
2012-04-23 04:35:02 C 12 16 01.78 -00 56 00.0 u H21
2012-04-23 04:37:42 C 12 16 02.06 -00 55 47.9 u H21
2012-04-23 04:51:33 C 12 16 06.40 -00 54 43.5 t G56
2012-04-23 05:04:20 C 12 16 07.80 -00 53 45.8 t G56
2012-04-23 05:24:59 C 12 16 10.15 -00 52 12.9 t G56
2012-04-23 22:16:35 C 12 18 25.51 +00 26 14.3 u C73
2012-04-23 22:17:45 C 12 18 25.65 +00 26 19.0 u C73
2012-04-23 22:18:54 C 12 18 25.82 +00 26 24.4 u C73
2012-04-23 22:21:13 C 12 18 26.12 +00 26 37.0 u C73
2012-04-23 22:22:23 C 12 18 26.25 +00 26 42.1 u C73
2012-04-23 22:23:32 C 12 18 26.40 +00 26 47.9 u C73
2012-04-23 22:24:42 C 12 18 26.57 +00 26 53.0 u C73
2012-04-23 22:25:52 C 12 18 26.73 +00 26 59.2 u C73
2012-04-23 22:27:02 C 12 18 26.87 +00 27 05.1 u C73
2012-04-23 22:28:12 C 12 18 26.92 +00 27 09.4 u C73
2012-04-23 22:29:21 C 12 18 27.11 +00 27 15.1 u C73
2012-04-23 22:30:30 C 12 18 27.27 +00 27 20.6 u C73
2012-04-24 05:36:59 C 12 19 31.60 +01 02 25.6 18.8 c 704
2012-04-24 05:51:50 C 12 19 32.17 +01 03 36.4 u H45
2012-04-24 05:52:20 C 12 19 33.50 +01 03 41.8 18.3 c 704
2012-04-24 05:53:57 C 12 19 32.47 +01 03 47.4 u H45
2012-04-24 05:55:07 C 12 19 32.62 +01 03 53.5 u H45
2012-04-24 05:56:18 C 12 19 32.74 +01 03 58.9 u H45
2012-04-24 05:58:09 C 12 19 32.94 +01 04 08.4 u H45
2012-04-24 06:00:19 C 12 19 33.25 +01 04 18.7 u H45
2012-04-24 06:01:50 C 12 19 33.45 +01 04 26.7 u H45
2012-04-24 06:07:43 C 12 19 35.46 +01 04 58.6 18.1 c 704
2012-04-24 06:23:50 C 12 19 37.49 +01 06 18.8 18.3 c 704
2012-04-24 06:39:04 C 12 19 39.39 +01 07 34.8 18.2 c 704
2012-04-24 22:10:56 C 12 22 05.48 +02 27 14.5 t 204
2012-04-24 22:17:49 C 12 22 06.44 +02 27 51.2 t 204
2012-04-24 22:24:42 C 12 22 07.44 +02 28 27.5 t 204
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)