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
2012-05-04 20:42:32 C 13 44 07.56 +36 20 48.6 o 639
2012-05-04 20:50:03 C 13 44 12.23 +36 22 14.6 o 639
2012-05-04 20:56:03 C 13 44 15.98 +36 23 23.0 o 639
2012-05-04 21:01:53 C 13 44 19.69 +36 24 30.9 o 639
2012-05-08 06:44:25 C 14 56 07.63 +51 08 50.1 u H21
2012-05-08 06:50:20 C 14 56 13.94 +51 09 45.5 u H21
2012-05-08 06:56:14 C 14 56 20.28 +51 10 40.8 u H21
2012-05-08 07:02:09 C 14 56 26.63 +51 11 35.9 u H21
2012-05-08 07:49:25 C 14 57 17.64 +51 18 53.4 u H21
2012-05-08 07:53:19 C 14 57 21.88 +51 19 29.4 u H21
2012-05-08 07:57:22 C 14 57 26.26 +51 20 06.5 u H21
2012-05-08 08:01:30 C 14 57 30.77 +51 20 44.7 u H21
2012-05-10 00:21:23 C 15 48 30.59 +56 50 33.2 u 160
2012-05-10 00:25:26 C 15 48 35.92 +56 51 00.8 u 160
2012-05-10 00:29:30 C 15 48 41.33 +56 51 27.8 u 160
2012-05-10 23:28:07 C 16 21 41.22 +59 07 26.6 v 160
2012-05-10 23:32:05 C 16 21 46.82 +59 07 46.9 v 160
2012-05-10 23:36:04 C 16 21 52.44 +59 08 07.3 v 160
2012-05-11 22:36:42 C 16 56 28.50 +60 42 24.2 t J84
2012-05-11 22:41:26 C 16 56 35.46 +60 42 40.3 t J84
2012-05-11 22:48:53 C 16 56 46.40 +60 43 06.0 t J84
2012-05-11 22:54:22 C 16 56 54.45 +60 43 25.2 t J84
2012-05-13 08:58:29 C 17 47 22.96 +61 52 46.9 u H21
2012-05-13 09:01:43 C 17 47 27.42 +61 52 49.6 u H21
2012-05-13 09:04:33 C 17 47 31.30 +61 52 51.8 u H21
2012-05-15 09:05:17 C 18 50 41.94 +61 36 49.7 o H21
2012-05-15 09:09:19 C 18 50 46.44 +61 36 44.6 o H21
2012-05-15 09:13:14 C 18 50 50.80 +61 36 39.3 o H21
2012-05-15 09:17:08 C 18 50 55.14 +61 36 34.1 o H21
2012-05-15 09:21:11 C 18 50 59.64 +61 36 28.5 o H21
2012-05-15 09:25:38 C 18 51 04.55 +61 36 22.4 o H21
2012-07-21 07:55:12 C 22 35 32.16 +31 07 43.9 u H21
2012-07-21 08:18:15 C 22 35 31.37 +31 07 24.6 u H21
2012-07-21 08:41:01 C 22 35 30.66 +31 07 05.0 u H21
2012-07-30 08:32:46 C 22 28 45.57 +27 42 33.0 u H21
2012-07-30 09:04:16 C 22 28 44.26 +27 42 00.3 u H21
2015-03-13 07:00:39 C 10 35 25.16 -12 19 51.5 t 705
2015-03-13 07:02:31 C 10 35 25.08 -12 19 50.8 t 705
2015-03-13 07:04:23 C 10 35 24.94 -12 19 50.0 t 705
2015-04-14 05:00:49 C 09 58 29.28 -00 00 23.0 t 675
2015-04-14 05:25:03 C 09 58 28.59 +00 00 10.7 t 675
2015-04-18 04:56:53 C 09 57 00.13 +02 18 15.8 o 291
2015-04-18 05:05:24 C 09 56 59.99 +02 18 28.3 o 291
2015-04-18 05:13:53 C 09 56 59.87 +02 18 40.7 o 291
2018-08-04 02:30:27 C 17 10 04.53 +19 05 39.4 u H21
2018-08-04 02:51:52 C 17 10 09.88 +19 05 04.7 u H21
2018-08-04 03:15:18 C 17 10 15.76 +19 04 27.2 u H21
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)