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
2022-05-13 20:44:13 C 11 55 43.24 +59 07 59.6 V C40
2022-05-13 20:44:56 C 11 55 43.27 +59 07 58.7 V C40
2022-05-13 20:47:23 C 11 55 43.34 +59 07 55.5 V C40
2022-05-13 20:48:06 C 11 55 43.37 +59 07 54.5 V C40
2022-05-13 20:49:10 C 11 55 43.39 +59 07 53.0 V C40
2022-05-13 20:50:34 C 11 55 43.43 +59 07 51.3 V C40
2022-05-13 20:50:54 C 11 55 43.45 +59 07 50.7 V C40
2022-05-13 20:52:41 C 11 55 43.51 +59 07 48.5 V C40
2022-05-13 20:53:45 C 11 55 43.55 +59 07 47.0 V C40
2022-05-13 20:55:51 C 11 55 43.61 +59 07 44.3 V C40
2022-05-13 20:56:11 C 11 55 43.61 +59 07 43.8 V C40
2022-05-13 20:59:45 C 11 55 43.73 +59 07 39.1 V C40
2022-05-13 21:00:06 C 11 55 43.73 +59 07 38.6 V C40
2022-05-13 21:15:29 C 11 55 44.24 +59 07 18.3 V C40
2022-05-13 21:16:54 C 11 55 44.27 +59 07 16.5 V C40
2022-05-13 21:17:36 C 11 55 44.29 +59 07 15.5 V C40
2022-05-13 21:22:33 C 11 55 44.46 +59 07 09.1 V C40
2022-05-13 21:23:36 C 11 55 44.50 +59 07 07.7 V C40
2022-05-13 21:25:23 C 11 55 44.55 +59 07 05.3 V C40
2022-05-13 21:26:47 C 11 55 44.60 +59 07 03.4 V C40
2022-05-13 21:27:08 C 11 55 44.60 +59 07 03.0 V C40
2022-05-13 21:27:30 C 11 55 44.61 +59 07 02.6 V C40
2022-05-13 21:29:15 C 11 55 44.67 +59 07 00.2 V C40
2022-05-13 21:29:37 C 11 55 44.69 +59 06 59.7 V C40
2022-05-13 21:29:57 C 11 55 44.70 +59 06 59.3 V C40
2022-05-13 21:31:22 C 11 55 44.73 +59 06 57.4 V C40
2022-05-13 21:33:09 C 11 55 44.81 +59 06 55.1 V C40
2022-05-13 21:39:03 C 11 55 45.00 +59 06 47.3 V C40
2022-05-13 21:39:44 C 11 55 45.01 +59 06 46.4 V C40
2022-05-13 21:42:54 C 11 55 45.11 +59 06 42.1 V C40
2022-05-13 21:43:17 C 11 55 45.13 +59 06 41.7 V C40
2022-05-13 21:47:52 C 11 55 45.29 +59 06 35.6 V C40
2022-05-13 21:48:35 C 11 55 45.30 +59 06 34.6 V C40
2022-05-13 21:49:39 C 11 55 45.33 +59 06 33.2 V C40
2022-05-13 21:50:22 C 11 55 45.37 +59 06 32.2 V C40
2022-05-13 21:51:26 C 11 55 45.39 +59 06 30.8 V C40
2022-05-13 21:52:29 C 11 55 45.44 +59 06 29.5 V C40
2022-05-13 21:52:50 C 11 55 45.44 +59 06 28.9 V C40
2022-05-13 21:54:16 C 11 55 45.50 +59 06 27.1 V C40
2022-05-13 21:55:20 C 11 55 45.52 +59 06 25.6 V C40
2022-05-13 21:56:24 C 11 55 45.55 +59 06 24.3 V C40
2022-05-13 21:57:28 C 11 55 45.59 +59 06 22.9 V C40
2022-05-14 20:31:05 C 11 56 35.06 +58 37 31.2 V C40
2022-05-14 20:31:25 C 11 56 35.08 +58 37 30.8 V C40
2022-05-14 20:31:47 C 11 56 35.09 +58 37 30.3 V C40
2022-05-14 20:32:09 C 11 56 35.10 +58 37 29.8 V C40
2022-05-14 20:32:29 C 11 56 35.10 +58 37 29.3 V C40
2022-05-14 20:32:52 C 11 56 35.11 +58 37 28.9 V C40
2022-05-14 20:33:12 C 11 56 35.13 +58 37 28.5 V C40
2022-05-14 20:34:36 C 11 56 35.18 +58 37 26.7 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)