137170 (1999 HF1)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4625092333 ± 7.37e-09
Semi-major axis (a)0.8191205796 AU ± 6.91e-11
Inclination (i)25.65676684° ± 6.33e-07
Long. of Asc. Node (Ω)155.84265542° ± 1.66e-06
Arg. of Perihelion (ω)253.41802715° ± 1.46e-06
Mean Anomaly (M)60.85489352° ± 1.85e-06
Mean Motion (n)1.3295066693°/day ± 1.68e-10
Perihelion dist (q)0.44026975 AU ± 6.04e-09
Aphelion dist (Q)1.19797141 AU ± 6.04e-09
Orbital Period0.74134738 yr ± 9.38e-11
Physical Parameters
H (abs. magnitude)14.66
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.179″
Uncertainty0
Orbit TypeAten
MOID0.173761 AU
Observations Used8344
Radar Obs Used1
Gaia Obs Used16
Oppositions6
Arc Total1999-2017
First Observation Used1999-04-20
Last Observation Used2025-08-18
Observations (8901)
Date Type RA Dec Mag Band Observatory
2014-07-08 00:03:53 C 04 31 27.02 +60 51 48.3 15.5 c 583
2014-07-08 00:04:22 C 04 31 27.26 +60 51 46.7 16.0 c 583
2014-07-08 00:04:52 C 04 31 27.48 +60 51 44.8 15.9 c 583
2014-07-08 00:05:23 C 04 31 27.73 +60 51 43.0 15.6 c 583
2014-07-08 00:05:53 C 04 31 27.97 +60 51 41.3 15.5 c 583
2014-07-08 00:06:22 C 04 31 28.20 +60 51 39.5 15.7 c 583
2014-07-08 00:06:52 C 04 31 28.42 +60 51 37.8 16.1 c 583
2014-07-08 00:07:44 C 04 31 28.78 +60 51 34.9 15.7 c 583
2014-07-08 00:08:15 C 04 31 29.05 +60 51 33.2 15.6 c 583
2014-07-08 00:08:45 C 04 31 29.27 +60 51 31.4 15.9 c 583
2014-07-08 00:09:14 C 04 31 29.47 +60 51 29.8 15.6 c 583
2014-07-08 00:09:45 C 04 31 29.72 +60 51 27.6 15.7 c 583
2014-07-08 00:10:16 C 04 31 29.98 +60 51 25.6 15.7 c 583
2014-07-08 00:10:46 C 04 31 30.18 +60 51 24.5 15.5 c 583
2014-07-08 00:11:15 C 04 31 30.43 +60 51 22.2 15.7 c 583
2014-07-08 00:11:45 C 04 31 30.65 +60 51 20.9 15.6 c 583
2014-07-08 00:12:16 C 04 31 30.87 +60 51 19.0 15.6 c 583
2014-07-08 00:12:46 C 04 31 31.10 +60 51 16.9 15.6 c 583
2014-07-11 00:05:08 C 05 00 45.38 +56 19 33.4 q 089
2014-07-11 00:08:08 C 05 00 46.46 +56 19 21.6 q 089
2014-07-11 00:11:08 C 05 00 47.60 +56 19 09.6 q 089
2014-07-11 00:14:08 C 05 00 48.64 +56 18 58.1 q 089
2014-07-11 00:17:08 C 05 00 49.74 +56 18 46.6 q 089
2014-07-11 00:20:08 C 05 00 50.85 +56 18 35.0 q 089
2014-07-11 00:23:08 C 05 00 51.95 +56 18 23.2 q 089
2014-07-11 00:26:08 C 05 00 52.96 +56 18 11.3 q 089
2014-07-11 00:29:08 C 05 00 54.21 +56 17 59.2 q 089
2016-03-29 01:37:14 C 03 37 52.77 +22 06 47.3 q H45
2016-03-29 01:38:04 C 03 37 52.98 +22 06 50.0 q H45
2016-03-29 01:39:07 C 03 37 53.30 +22 06 53.6 q H45
2016-03-29 01:40:09 C 03 37 53.60 +22 06 57.1 q H45
2016-03-29 01:41:11 C 03 37 53.89 +22 07 00.7 q H45
2016-03-29 01:42:11 C 03 37 54.20 +22 07 04.0 q H45
2016-03-29 19:31:18 C 03 43 11.81 +23 07 43.1 q 006
2016-03-29 19:41:08 C 03 43 14.71 +23 08 15.6 q 006
2016-03-29 19:46:22 C 03 43 16.23 +23 08 33.5 q 006
2016-04-03 02:07:43 C 04 15 03.15 +28 48 28.4 q H45
2016-04-03 02:08:53 C 04 15 03.53 +28 48 31.9 q H45
2016-04-03 02:10:32 C 04 15 04.06 +28 48 37.3 q H45
2016-04-03 02:11:44 C 04 15 04.44 +28 48 41.2 q H45
2016-04-03 02:12:55 C 04 15 04.84 +28 48 44.9 q H45
2016-04-03 02:14:09 C 04 15 05.22 +28 48 48.9 q H45
2016-04-05 02:04:45 C 04 30 44.63 +31 18 48.8 q H45
2016-04-05 02:05:59 C 04 30 45.04 +31 18 52.6 q H45
2016-04-05 02:06:59 C 04 30 45.39 +31 18 55.7 q H45
2016-04-05 02:07:55 C 04 30 45.68 +31 18 58.2 q H45
2016-04-05 02:08:49 C 04 30 45.97 +31 19 01.1 q H45
2016-04-05 02:09:42 C 04 30 46.32 +31 19 04.0 q H45
2016-04-07 03:20:32 C 04 47 21.13 +33 44 26.0 q H45
2016-04-07 03:22:06 C 04 47 21.65 +33 44 30.8 q H45
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2022-03-19 21:40:00 186720536 10 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)