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
2022-07-18 21:20:48 C 13 15 26.63 +29 16 01.6 V C23
2022-07-19 06:53:45 C 13 16 00.792 +29 05 29.54 V T08
2022-07-19 06:58:20 C 13 16 01.046 +29 05 24.50 V T08
2022-07-19 07:08:51 C 13 16 01.663 +29 05 12.66 V T08
2022-07-19 07:27:16 C 13 16 02.722 +29 04 51.89 V T08
2022-07-19 07:45:40 C 13 16 03.787 +29 04 30.97 V T08
2022-07-19 19:09:52 C 13 16 44.74 +28 51 44.2 V C40
2022-07-19 19:10:33 C 13 16 44.78 +28 51 43.4 V C40
2022-07-19 19:20:09 C 13 16 45.34 +28 51 32.6 V C40
2022-07-19 19:23:34 C 13 16 45.54 +28 51 28.6 V C40
2022-07-19 19:28:23 C 13 16 45.82 +28 51 23.3 V C40
2022-07-19 19:29:03 C 13 16 45.86 +28 51 22.5 V C40
2022-07-19 19:39:19 C 13 16 46.46 +28 51 10.8 V C40
2022-07-19 19:43:26 C 13 16 46.71 +28 51 06.2 V C40
2022-07-19 19:44:07 C 13 16 46.75 +28 51 05.4 V C40
2022-07-19 19:44:49 C 13 16 46.79 +28 51 04.6 V C40
2022-07-19 19:45:29 C 13 16 46.83 +28 51 03.9 V C40
2022-07-19 19:47:33 C 13 16 46.95 +28 51 01.5 V C40
2022-07-19 19:54:25 C 13 16 47.36 +28 50 53.8 V C40
2022-07-19 19:57:08 C 13 16 47.52 +28 50 50.7 V C40
2022-07-19 20:16:05 C 13 16 48.64 +28 50 29.3 V C40
2022-07-20 05:59:45 C 13 17 23.688 +28 39 44.64 V T08
2022-07-20 06:09:02 C 13 17 24.223 +28 39 34.20 V T08
2022-07-20 06:13:38 C 13 17 24.490 +28 39 29.16 V T08
2022-07-20 06:40:44 C 13 17 26.038 +28 38 58.60 V T08
2022-07-20 17:57:26 C 13 18 06.60 +28 26 17.7 V C40
2022-07-20 18:00:37 C 13 18 06.79 +28 26 14.1 V C40
2022-07-20 18:04:51 C 13 18 07.03 +28 26 09.4 V C40
2022-07-20 18:11:32 C 13 18 07.42 +28 26 01.7 V C40
2022-07-20 18:13:19 C 13 18 07.52 +28 25 59.7 V C40
2022-07-20 18:14:02 C 13 18 07.56 +28 25 58.9 V C40
2022-07-20 18:15:26 C 13 18 07.64 +28 25 57.4 V C40
2022-07-20 18:15:46 C 13 18 07.66 +28 25 56.9 V C40
2022-07-20 18:21:25 C 13 18 07.99 +28 25 50.6 V C40
2022-07-20 18:22:28 C 13 18 08.05 +28 25 49.4 V C40
2022-07-20 18:27:45 C 13 18 08.36 +28 25 43.4 V C40
2022-07-20 18:31:18 C 13 18 08.57 +28 25 39.4 V C40
2022-07-20 18:33:46 C 13 18 08.71 +28 25 36.7 V C40
2022-07-20 18:34:07 C 13 18 08.73 +28 25 36.3 V C40
2022-07-20 18:34:29 C 13 18 08.76 +28 25 35.9 V C40
2022-07-20 18:48:35 C 13 18 09.58 +28 25 19.9 V C40
2022-07-20 18:50:22 C 13 18 09.69 +28 25 17.9 V C40
2022-07-20 18:52:28 C 13 18 09.81 +28 25 15.6 V C40
2022-07-20 18:53:32 C 13 18 09.87 +28 25 14.3 V C40
2022-07-20 18:54:13 C 13 18 09.91 +28 25 13.5 V C40
2022-07-20 18:56:20 C 13 18 10.04 +28 25 11.2 V C40
2022-07-20 19:02:22 C 13 18 10.39 +28 25 04.4 V C40
2022-07-20 19:05:36 C 13 18 10.58 +28 25 00.6 V C40
2022-07-20 19:06:17 C 13 18 10.62 +28 24 59.9 V C40
2022-07-20 19:07:00 C 13 18 10.66 +28 24 59.1 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)