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
2022-05-09 20:19:07 C 11 52 22.37 +61 14 46.6 V C40
2022-05-09 20:19:28 C 11 52 22.40 +61 14 46.2 V C40
2022-05-09 20:19:50 C 11 52 22.39 +61 14 45.6 V C40
2022-05-09 20:20:32 C 11 52 22.42 +61 14 44.7 V C40
2022-05-09 20:20:54 C 11 52 22.43 +61 14 44.1 V C40
2022-05-09 20:21:57 C 11 52 22.46 +61 14 42.8 V C40
2022-05-09 20:22:39 C 11 52 22.48 +61 14 41.7 V C40
2022-05-09 20:23:21 C 11 52 22.50 +61 14 40.7 V C40
2022-05-09 20:27:30 C 11 52 22.62 +61 14 35.1 V C40
2022-05-09 20:28:56 C 11 52 22.64 +61 14 33.1 V C40
2022-05-09 20:29:17 C 11 52 22.65 +61 14 32.7 V C40
2022-05-09 20:29:37 C 11 52 22.67 +61 14 32.2 V C40
2022-05-09 20:30:00 C 11 52 22.68 +61 14 31.7 V C40
2022-05-09 20:30:21 C 11 52 22.68 +61 14 31.2 V C40
2022-05-09 20:31:04 C 11 52 22.71 +61 14 30.2 V C40
2022-05-09 20:31:24 C 11 52 22.72 +61 14 29.8 V C40
2022-05-09 20:31:45 C 11 52 22.73 +61 14 29.3 V C40
2022-05-09 20:32:28 C 11 52 22.75 +61 14 28.3 V C40
2022-05-09 20:32:48 C 11 52 22.76 +61 14 27.8 V C40
2022-05-09 20:33:11 C 11 52 22.77 +61 14 27.4 V C40
2022-05-09 20:34:14 C 11 52 22.80 +61 14 26.0 V C40
2022-05-09 20:34:56 C 11 52 22.82 +61 14 24.9 V C40
2022-05-09 20:37:46 C 11 52 22.89 +61 14 21.1 V C40
2022-05-09 20:39:12 C 11 52 22.93 +61 14 19.1 V C40
2022-05-09 20:39:33 C 11 52 22.94 +61 14 18.6 V C40
2022-05-09 20:39:53 C 11 52 22.95 +61 14 18.2 V C40
2022-05-09 20:40:16 C 11 52 22.97 +61 14 17.6 V C40
2022-05-09 20:40:37 C 11 52 22.97 +61 14 17.1 V C40
2022-05-09 20:40:57 C 11 52 22.97 +61 14 16.7 V C40
2022-05-09 20:55:40 C 11 52 23.39 +61 13 56.5 V C40
2022-05-09 20:58:10 C 11 52 23.48 +61 13 53.1 V C40
2022-05-09 21:00:24 C 11 52 23.53 +61 13 50.0 V C40
2022-05-09 21:01:48 C 11 52 23.57 +61 13 48.1 V C40
2022-05-09 21:04:38 C 11 52 23.66 +61 13 44.2 V C40
2022-05-09 21:04:58 C 11 52 23.67 +61 13 43.7 V C40
2022-05-09 21:05:19 C 11 52 23.67 +61 13 43.3 V C40
2022-05-09 21:07:05 C 11 52 23.73 +61 13 40.8 V C40
2022-05-09 21:08:29 C 11 52 23.77 +61 13 38.9 V C40
2022-05-09 21:08:51 C 11 52 23.77 +61 13 38.4 V C40
2022-05-09 21:09:33 C 11 52 23.79 +61 13 37.4 V C40
2022-05-09 21:10:16 C 11 52 23.82 +61 13 36.5 V C40
2022-05-09 21:19:34 C 11 52 24.08 +61 13 23.7 V C40
2022-05-09 21:23:06 C 11 52 24.17 +61 13 18.7 V C40
2022-05-09 21:24:31 C 11 52 24.21 +61 13 16.9 V C40
2022-05-09 21:24:52 C 11 52 24.23 +61 13 16.3 V C40
2022-05-09 21:25:35 C 11 52 24.26 +61 13 15.3 V C40
2022-05-09 21:25:56 C 11 52 24.26 +61 13 14.8 V C40
2022-05-09 21:27:42 C 11 52 24.31 +61 13 12.5 V C40
2022-05-09 21:34:06 C 11 52 24.50 +61 13 03.6 V C40
2022-05-09 21:37:17 C 11 52 24.60 +61 12 59.2 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)