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
2012-04-28 21:08:41 C 12 42 06.47 +12 43 04.8 r 106
2012-04-28 21:24:54 C 12 42 10.48 +12 45 11.8 r 106
2012-04-28 21:41:13 C 12 42 14.36 +12 47 17.7 r 106
2012-04-29 22:41:36 C 12 49 30.79 +16 12 28.3 u 160
2012-04-29 22:44:57 C 12 49 31.75 +16 12 57.1 u 160
2012-04-29 22:48:02 C 12 49 32.66 +16 13 23.8 u 160
2012-05-01 20:34:48 C 13 06 09.17 +23 19 10.0 t J84
2012-05-01 20:38:38 C 13 06 10.60 +23 19 48.7 t J84
2012-05-01 20:42:27 C 13 06 12.12 +23 20 26.7 t J84
2012-05-01 20:46:16 C 13 06 13.67 +23 21 05.6 t J84
2012-05-01 20:50:06 C 13 06 15.09 +23 21 44.4 t J84
2012-05-01 20:53:55 C 13 06 16.64 +23 22 22.3 t J84
2012-05-02 07:03:02 C 13 10 29.18 +25 05 46.6 u H21
2012-05-02 07:07:20 C 13 10 30.95 +25 06 30.3 u H21
2012-05-02 07:11:22 C 13 10 32.63 +25 07 11.3 u H21
2012-05-02 07:15:24 C 13 10 34.33 +25 07 52.1 u H21
2012-05-02 21:35:09 C 13 17 19.24 +27 38 07.9 u 203
2012-05-02 22:21:13 C 13 17 40.02 +27 46 19.4 u 203
2012-05-02 23:27:09 C 13 18 10.13 +27 58 01.4 c A24
2012-05-02 23:28:38 C 13 18 10.76 +27 58 17.3 c A24
2012-05-02 23:30:07 C 13 18 11.46 +27 58 32.8 c A24
2012-05-03 00:32:18 C 13 18 40.22 +28 09 32.7 c A24
2012-05-03 00:33:46 C 13 18 40.93 +28 09 48.9 c A24
2012-05-03 00:35:16 C 13 18 41.64 +28 10 04.5 c A24
2012-05-03 03:46:35 C 13 20 23.79 +28 44 51.1 o H21
2012-05-03 03:50:40 C 13 20 25.70 +28 45 35.4 o H21
2012-05-03 03:54:46 C 13 20 27.62 +28 46 19.8 o H21
2012-05-03 03:58:51 C 13 20 29.53 +28 47 04.3 o H21
2012-05-03 04:03:13 C 13 20 31.56 +28 47 51.5 o H21
2012-05-03 05:12:54 C 13 21 04.24 +29 00 25.2 u H21
2012-05-03 05:16:56 C 13 21 06.13 +29 01 08.6 u H21
2012-05-03 05:21:07 C 13 21 08.10 +29 01 53.5 u H21
2012-05-03 05:25:16 C 13 21 10.07 +29 02 38.7 u H21
2012-05-03 05:29:19 C 13 21 11.98 +29 03 22.2 u H21
2012-05-03 06:32:55 C 13 21 42.72 +29 15 00.4 u H45
2012-05-03 06:35:36 C 13 21 44.00 +29 15 28.9 u H45
2012-05-03 06:37:47 C 13 21 45.06 +29 15 52.8 u H45
2012-05-03 06:39:43 C 13 21 45.99 +29 16 14.4 u H45
2012-05-03 06:42:06 C 13 21 47.08 +29 16 38.3 u H45
2012-05-03 06:44:11 C 13 21 48.15 +29 17 02.3 u H45
2012-05-03 21:53:30 C 13 30 05.08 +32 03 39.9 u 203
2012-05-03 22:41:15 C 13 30 30.67 +32 12 31.6 c A24
2012-05-03 22:41:59 C 13 30 30.95 +32 12 40.1 c A24
2012-05-03 22:42:43 C 13 30 31.41 +32 12 47.8 c A24
2012-05-03 22:43:28 C 13 30 31.79 +32 12 56.3 c A24
2012-05-03 22:44:13 C 13 30 32.15 +32 13 04.1 c A24
2012-05-03 22:44:57 C 13 30 32.58 +32 13 12.7 c A24
2012-05-03 22:57:57 C 13 30 39.46 +32 15 37.3 u 203
2012-05-03 23:49:41 C 13 31 07.38 +32 25 10.8 c A24
2012-05-03 23:53:24 C 13 31 09.38 +32 25 52.9 c A24
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)