420591 (2012 HF31)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4425729540 ± 1.37e-08
Semi-major axis (a)1.5536559513 AU ± 3.62e-09
Inclination (i)9.10585674° ± 2.44e-06
Long. of Asc. Node (Ω)325.71200872° ± 1.92e-05
Arg. of Perihelion (ω)30.37588451° ± 2.01e-05
Mean Anomaly (M)259.91453518° ± 5.47e-06
Mean Motion (n)0.5089557166°/day ± 1.78e-09
Perihelion dist (q)0.86604985 AU ± 2.14e-08
Aphelion dist (Q)2.24126206 AU ± 2.20e-08
Orbital Period1.93656590 yr ± 6.78e-09
Physical Parameters
H (abs. magnitude)19.49
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.159″
Uncertainty0
Orbit TypeApollo
MOID0.068212 AU
Observations Used150
Radar Obs Used2
Oppositions9
Arc Total2000-2018
First Observation Used2000-02-12
Last Observation Used2025-03-03
Observations (175)
Date Type RA Dec Mag Band Observatory
2014-05-02 03:28:48 C 14 08 49.08 -33 53 47.8 L W84
2014-05-02 03:29:08 C 14 08 49.08 -33 53 47.8 L W84
2014-11-10 00:11:26 C 19 20 44.79 -06 03 10.3 u 807
2014-11-10 00:16:12 C 19 20 45.80 -06 03 02.7 u 807
2014-11-10 00:20:29 C 19 20 46.72 -06 02 55.7 u 807
2014-11-20 17:36:36 C 20 18 40.68 +02 12 44.7 q 204
2014-11-20 18:13:50 C 20 18 49.53 +02 14 03.0 q 204
2014-12-11 01:29:29 C 22 31 34.37 +19 25 11.9 q 703
2014-12-11 01:41:04 C 22 31 37.74 +19 25 31.4 q 703
2014-12-11 01:46:50 C 22 31 39.48 +19 25 43.3 q 703
2014-12-14 01:20:53 S 22 52 51.974 +21 31 43.21 L C51
2014-12-14 04:30:07 S 22 53 47.964 +21 36 57.96 L C51
2014-12-14 07:39:32 S 22 54 44.251 +21 42 11.84 L C51
2014-12-22 05:03:33 C 23 50 17.892 +26 06 54.37 L F51
2014-12-22 05:20:29 C 23 50 22.636 +26 07 13.44 L F51
2014-12-22 05:37:26 C 23 50 27.399 +26 07 32.55 L F51
2014-12-22 05:54:28 C 23 50 32.178 +26 07 51.56 L F51
2014-12-30 01:17:48 C 00 42 13.11 +28 54 52.2 q 448
2014-12-30 01:51:11 C 00 42 21.77 +28 55 14.2 q 448
2014-12-30 02:24:06 C 00 42 30.16 +28 55 36.4 q 448
2015-01-03 19:14:08 C 01 11 06.67 +29 57 28.6 t 204
2015-01-03 19:40:20 C 01 11 12.99 +29 57 40.0 t 204
2015-01-21 02:18:10 C 02 38 48.04 +31 10 23.4 q G96
2015-01-21 02:25:44 C 02 38 49.43 +31 10 23.4 q G96
2015-01-21 02:33:17 C 02 38 50.74 +31 10 23.3 q G96
2015-01-21 02:40:50 C 02 38 52.02 +31 10 23.2 q G96
2016-11-10 14:12:39 S 13 09 22.38 +70 01 50.2 L C51
2016-11-10 15:46:54 S 13 08 32.36 +70 05 56.5 L C51
2016-11-10 17:21:09 S 13 07 42.24 +70 10 01.2 L C51
2016-11-10 17:21:20 S 13 07 42.19 +70 10 02.2 L C51
2016-11-10 18:55:35 S 13 06 51.81 +70 14 07.0 L C51
2016-11-10 22:04:16 S 13 05 10.14 +70 22 12.0 L C51
2016-12-03 20:22:58 C 06 47 15.86 +69 26 48.8 S C47
2016-12-03 20:28:01 C 06 47 13.94 +69 26 39.0 S C47
2016-12-03 20:33:20 C 06 47 11.95 +69 26 29.1 S C47
2016-12-03 20:38:39 C 06 47 09.95 +69 26 18.7 S C47
2016-12-03 20:42:54 C 06 47 08.41 +69 26 10.4 S C47
2016-12-03 20:46:37 C 06 47 06.99 +69 26 03.4 S C47
2016-12-09 22:53:05 C 06 05 50.07 +64 19 53.5 r 106
2016-12-09 23:11:29 C 06 05 45.85 +64 19 14.2 r 106
2016-12-09 23:29:51 C 06 05 41.63 +64 18 35.2 r 106
2016-12-09 23:48:13 C 06 05 37.38 +64 17 56.9 r 106
2016-12-10 01:07:00 C 06 05 24.03 +64 14 56.6 q I15
2016-12-10 01:09:06 C 06 05 23.57 +64 14 52.4 q I15
2016-12-10 01:11:12 C 06 05 23.11 +64 14 47.9 q I15
2016-12-22 23:59:33 C 05 24 56.97 +53 40 16.9 U 130
2016-12-23 00:01:41 C 05 24 56.81 +53 40 12.8 U 130
2016-12-23 00:03:51 C 05 24 56.67 +53 40 08.7 U 130
2016-12-23 00:06:00 C 05 24 56.46 +53 40 04.8 U 130
2016-12-28 08:28:22 C 05 17 49.83 +49 51 15.3 R G45
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2018-08-09 15:21:00 -106101.464 0.3 Hz 2380 -1 -1
2018-08-13 16:14:00 -139851.1548 0.02 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)