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
2000-02-12 09:52:33 C 11 40 37.58 -02 36 19.6 q 645
2000-02-12 09:53:44 C 11 40 37.54 -02 36 19.7 q 645
2000-02-12 09:57:19 C 11 40 37.35 -02 36 19.3 q 645
2012-04-24 08:36:02 C 13 22 06.539 -27 02 46.01 L F51
2012-04-24 08:57:16 C 13 22 04.776 -27 02 39.83 L F51
2012-04-24 09:18:32 C 13 22 03.018 -27 02 33.69 L F51
2012-04-24 09:39:52 C 13 22 01.242 -27 02 27.59 L F51
2012-04-25 08:26:54 C 13 20 12.00 -26 55 37.9 t F65
2012-04-25 08:29:50 C 13 20 11.74 -26 55 36.9 t F65
2012-04-25 08:32:42 C 13 20 11.49 -26 55 36.3 t F65
2012-04-25 08:35:35 C 13 20 11.25 -26 55 35.2 t F65
2012-04-25 08:38:26 C 13 20 11.02 -26 55 34.3 t F65
2012-04-29 05:52:48 C 13 12 49.06 -26 24 33.1 o 291
2012-04-29 05:59:34 C 13 12 48.46 -26 24 30.3 o 291
2012-04-29 06:06:19 C 13 12 48.00 -26 24 28.6 o 291
2012-05-12 03:23:13 C 12 51 05.46 -24 15 54.0 o 807
2012-05-12 03:29:06 C 12 51 05.10 -24 15 51.3 o 807
2012-05-12 03:34:56 C 12 51 04.70 -24 15 49.1 o 807
2012-05-12 03:40:37 C 12 51 04.73 -24 15 54.2 o 291
2012-05-12 03:44:51 C 12 51 04.47 -24 15 52.8 o 291
2012-05-12 03:49:03 C 12 51 04.24 -24 15 50.3 o 291
2012-05-15 03:59:01 C 12 46 54.69 -23 42 56.3 o 807
2012-05-15 04:13:42 C 12 46 53.84 -23 42 49.0 o 807
2012-05-15 04:28:27 C 12 46 53.01 -23 42 42.7 o 807
2012-06-06 00:25:22 C 12 30 25.44 -20 10 49.7 o 807
2012-06-06 00:42:39 C 12 30 25.27 -20 10 43.8 o 807
2012-06-06 01:00:27 C 12 30 25.05 -20 10 38.5 o 807
2012-12-05 01:57:49 C 20 51 22.91 -08 06 25.2 o 291
2012-12-05 02:03:48 C 20 51 24.18 -08 06 17.0 o 291
2012-12-05 02:09:48 C 20 51 25.40 -08 06 08.7 o 291
2014-02-25 15:10:30 C 14 57 27.835 -27 27 22.87 t 568
2014-02-25 15:31:52 C 14 57 28.352 -27 27 31.36 t 568
2014-04-28 03:25:06 C 14 17 23.00 -34 05 49.8 L W84
2014-04-28 03:25:26 C 14 17 23.00 -34 05 49.8 L W84
2014-04-28 03:29:55 C 14 17 22.56 -34 05 49.5 L W84
2014-04-28 03:30:15 C 14 17 22.56 -34 05 49.5 L W84
2014-04-28 03:34:42 C 14 17 22.13 -34 05 49.1 L W84
2014-04-28 03:35:02 C 14 17 22.13 -34 05 49.1 L W84
2014-04-28 03:39:33 C 14 17 21.70 -34 05 48.7 L W84
2014-04-28 03:39:53 C 14 17 21.70 -34 05 48.7 L W84
2014-04-28 03:44:32 C 14 17 21.25 -34 05 48.4 L W84
2014-04-28 03:44:52 C 14 17 21.25 -34 05 48.4 L W84
2014-05-02 03:10:09 C 14 08 50.85 -33 53 50.8 L W84
2014-05-02 03:10:28 C 14 08 50.85 -33 53 50.8 L W84
2014-05-02 03:14:49 C 14 08 50.41 -33 53 50.3 L W84
2014-05-02 03:15:09 C 14 08 50.41 -33 53 50.3 L W84
2014-05-02 03:19:29 C 14 08 49.96 -33 53 49.3 L W84
2014-05-02 03:19:49 C 14 08 49.96 -33 53 49.3 L W84
2014-05-02 03:24:10 C 14 08 49.52 -33 53 48.6 L W84
2014-05-02 03:24:30 C 14 08 49.52 -33 53 48.6 L W84
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)