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
2022-05-31 20:42:05 C 12 13 21.89 +50 27 03.5 V C40
2022-05-31 20:50:36 C 12 13 22.25 +50 26 53.4 V C40
2022-05-31 20:51:40 C 12 13 22.31 +50 26 52.3 V C40
2022-05-31 20:54:09 C 12 13 22.41 +50 26 49.3 V C40
2022-05-31 20:54:29 C 12 13 22.42 +50 26 48.9 V C40
2022-05-31 20:54:50 C 12 13 22.43 +50 26 48.4 V C40
2022-05-31 20:55:13 C 12 13 22.46 +50 26 48.1 V C40
2022-05-31 20:59:07 C 12 13 22.62 +50 26 43.4 V C40
2022-05-31 20:59:28 C 12 13 22.63 +50 26 43.2 V C40
2022-05-31 20:59:48 C 12 13 22.66 +50 26 42.8 V C40
2022-05-31 21:00:31 C 12 13 22.68 +50 26 41.8 V C40
2022-05-31 21:01:35 C 12 13 22.73 +50 26 40.7 V C40
2022-05-31 21:01:56 C 12 13 22.74 +50 26 40.3 V C40
2022-05-31 21:03:42 C 12 13 22.82 +50 26 38.1 V C40
2022-05-31 21:04:03 C 12 13 22.82 +50 26 37.6 V C40
2022-05-31 21:04:25 C 12 13 22.85 +50 26 37.2 V C40
2022-05-31 21:04:45 C 12 13 22.86 +50 26 36.9 V C40
2022-05-31 21:05:06 C 12 13 22.86 +50 26 36.4 V C40
2022-05-31 21:05:28 C 12 13 22.89 +50 26 36.0 V C40
2022-05-31 21:05:49 C 12 13 22.92 +50 26 35.6 V C40
2022-05-31 21:06:10 C 12 13 22.93 +50 26 35.3 V C40
2022-05-31 21:06:32 C 12 13 22.94 +50 26 34.9 V C40
2022-05-31 21:06:53 C 12 13 22.96 +50 26 34.3 V C40
2022-05-31 21:07:14 C 12 13 22.97 +50 26 33.9 V C40
2022-05-31 21:08:19 C 12 13 23.03 +50 26 32.7 V C40
2022-05-31 21:10:26 C 12 13 23.11 +50 26 30.2 V C40
2022-05-31 21:21:59 C 12 13 23.61 +50 26 16.7 V C40
2022-05-31 21:23:02 C 12 13 23.66 +50 26 15.4 V C40
2022-05-31 21:23:23 C 12 13 23.68 +50 26 14.9 V C40
2022-05-31 21:25:10 C 12 13 23.76 +50 26 13.0 V C40
2022-05-31 21:27:58 C 12 13 23.89 +50 26 09.6 V C40
2022-05-31 21:32:34 C 12 13 24.07 +50 26 04.1 V C40
2022-05-31 21:35:45 C 12 13 24.21 +50 26 00.4 V C40
2022-05-31 21:45:36 C 12 13 24.66 +50 25 48.8 V C40
2022-05-31 21:46:40 C 12 13 24.71 +50 25 47.6 V C40
2022-05-31 21:47:00 C 12 13 24.72 +50 25 47.2 V C40
2022-05-31 21:51:35 C 12 13 24.92 +50 25 41.7 V C40
2022-05-31 21:51:57 C 12 13 24.94 +50 25 41.3 V C40
2022-05-31 21:52:18 C 12 13 24.95 +50 25 41.0 V C40
2022-05-31 21:54:04 C 12 13 25.02 +50 25 38.9 V C40
2022-05-31 21:54:25 C 12 13 25.04 +50 25 38.5 V C40
2022-05-31 21:58:16 C 12 13 25.21 +50 25 33.9 V C40
2022-05-31 21:59:41 C 12 13 25.27 +50 25 32.2 V C40
2022-05-31 22:00:02 C 12 13 25.30 +50 25 31.8 V C40
2022-05-31 22:00:45 C 12 13 25.31 +50 25 31.1 V C40
2022-06-01 05:42:51 C 12 13 46.582 +50 16 46.74 V 703
2022-06-01 05:50:37 C 12 13 46.898 +50 16 37.67 V 703
2022-06-01 05:58:23 C 12 13 47.230 +50 16 28.63 V 703
2022-06-01 06:06:09 C 12 13 47.554 +50 16 19.42 V 703
2022-06-01 18:41:50 C 12 14 22.61 +50 01 53.5 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)