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
2022-06-11 19:31:34 C 12 25 58.26 +45 31 00.0 V C40
2022-06-11 19:32:58 C 12 25 58.34 +45 30 58.4 V C40
2022-06-11 19:35:25 C 12 25 58.46 +45 30 55.6 V C40
2022-06-11 20:48:19 C 12 26 02.280 +45 29 35.48 t A16
2022-06-11 21:12:10 C 12 26 03.406 +45 29 08.66 t A16
2022-06-11 21:18:44 C 12 26 03.746 +45 29 00.60 X K87
2022-06-11 21:20:51 C 12 26 03.828 +45 28 57.97 X K87
2022-06-11 21:22:58 C 12 26 03.910 +45 28 55.67 X K87
2022-06-11 21:29:49 C 12 26 04.250 +45 28 48.79 t A16
2022-06-12 18:15:28 C 12 27 07.11 +45 05 51.1 V C40
2022-06-12 18:17:32 C 12 27 07.22 +45 05 48.8 V C40
2022-06-12 18:17:53 C 12 27 07.22 +45 05 48.5 V C40
2022-06-12 18:18:14 C 12 27 07.25 +45 05 48.2 V C40
2022-06-12 18:20:41 C 12 27 07.37 +45 05 45.4 V C40
2022-06-12 18:22:48 C 12 27 07.47 +45 05 42.9 V C40
2022-06-12 18:48:30 C 12 27 08.70 +45 05 14.2 V C40
2022-06-12 18:50:59 C 12 27 08.81 +45 05 11.5 V C40
2022-06-12 18:57:40 C 12 27 09.14 +45 05 03.9 V C40
2022-06-12 18:59:04 C 12 27 09.21 +45 05 02.3 V C40
2022-06-12 18:59:24 C 12 27 09.22 +45 05 02.0 V C40
2022-06-12 19:00:28 C 12 27 09.28 +45 05 00.7 V C40
2022-06-12 19:08:36 C 12 27 09.66 +45 04 51.6 V C40
2022-06-12 19:11:24 C 12 27 09.79 +45 04 48.4 V C40
2022-06-12 19:12:27 C 12 27 09.85 +45 04 47.4 V C40
2022-06-12 19:12:49 C 12 27 09.87 +45 04 46.8 V C40
2022-06-12 19:14:34 C 12 27 09.94 +45 04 44.9 V C40
2022-06-12 19:15:59 C 12 27 10.02 +45 04 43.4 V C40
2022-06-12 19:16:20 C 12 27 10.03 +45 04 43.0 V C40
2022-06-12 19:34:15 C 12 27 10.91 +45 04 22.7 V C40
2022-06-13 05:22:22 C 12 27 40.561 +44 53 34.98 V 703
2022-06-13 05:30:44 C 12 27 40.950 +44 53 25.55 V 703
2022-06-13 05:39:06 C 12 27 41.346 +44 53 16.12 V 703
2022-06-13 05:47:28 C 12 27 41.760 +44 53 06.86 V 703
2022-06-13 18:45:32 C 12 28 21.52 +44 38 46.6 V C40
2022-06-13 18:48:22 C 12 28 21.67 +44 38 43.6 V C40
2022-06-13 18:53:16 C 12 28 21.90 +44 38 38.0 V C40
2022-06-13 18:55:23 C 12 28 22.01 +44 38 35.6 V C40
2022-06-13 18:59:57 C 12 28 22.23 +44 38 30.5 V C40
2022-06-13 19:09:59 C 12 28 22.71 +44 38 19.3 V C40
2022-06-13 19:10:20 C 12 28 22.73 +44 38 18.9 V C40
2022-06-13 19:10:42 C 12 28 22.74 +44 38 18.5 V C40
2022-06-13 19:11:24 C 12 28 22.77 +44 38 17.6 V C40
2022-06-13 19:13:30 C 12 28 22.88 +44 38 15.3 V C40
2022-06-13 19:15:37 C 12 28 22.98 +44 38 13.0 V C40
2022-06-13 19:21:14 C 12 28 23.25 +44 38 06.7 V C40
2022-06-13 19:21:36 C 12 28 23.28 +44 38 06.2 V C40
2022-06-13 19:22:17 C 12 28 23.31 +44 38 05.4 V C40
2022-06-13 19:22:39 C 12 28 23.32 +44 38 05.0 V C40
2022-06-13 19:23:00 C 12 28 23.34 +44 38 04.6 V C40
2022-06-13 19:24:46 C 12 28 23.43 +44 38 02.7 V C40
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)