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
2022-06-13 19:25:27 C 12 28 23.46 +44 38 01.9 V C40
2022-06-13 19:26:10 C 12 28 23.50 +44 38 01.2 V C40
2022-06-13 19:27:13 C 12 28 23.54 +44 38 00.0 V C40
2022-06-13 19:28:37 C 12 28 23.61 +44 37 58.3 V C40
2022-06-13 19:30:44 C 12 28 23.72 +44 37 56.1 V C40
2022-06-13 19:31:04 C 12 28 23.74 +44 37 55.7 V C40
2022-06-13 19:33:11 C 12 28 23.84 +44 37 53.2 V C40
2022-06-13 19:33:33 C 12 28 23.86 +44 37 52.8 V C40
2022-06-13 19:35:17 C 12 28 23.93 +44 37 50.9 V C40
2022-06-13 19:37:24 C 12 28 24.04 +44 37 48.6 V C40
2022-06-13 19:37:45 C 12 28 24.06 +44 37 48.2 V C40
2022-06-13 19:38:48 C 12 28 24.10 +44 37 46.9 V C40
2022-06-13 19:41:58 C 12 28 24.27 +44 37 43.4 V C40
2022-06-13 19:42:19 C 12 28 24.28 +44 37 43.0 V C40
2022-06-13 19:43:01 C 12 28 24.32 +44 37 42.2 V C40
2022-06-13 19:44:05 C 12 28 24.36 +44 37 41.1 V C40
2022-06-13 19:44:26 C 12 28 24.38 +44 37 40.6 V C40
2022-06-13 19:44:48 C 12 28 24.40 +44 37 40.3 V C40
2022-06-13 19:45:51 C 12 28 24.46 +44 37 39.1 V C40
2022-06-13 19:46:33 C 12 28 24.49 +44 37 38.2 V C40
2022-06-13 19:46:55 C 12 28 24.50 +44 37 37.8 V C40
2022-06-13 19:50:05 C 12 28 24.66 +44 37 34.2 V C40
2022-06-13 19:50:44 C 12 28 24.69 +44 37 33.5 V C40
2022-06-13 19:51:47 C 12 28 24.74 +44 37 32.4 V C40
2022-06-13 19:52:07 C 12 28 24.75 +44 37 32.0 V C40
2022-06-13 19:57:04 C 12 28 25.00 +44 37 26.4 V C40
2022-06-13 19:57:45 C 12 28 25.03 +44 37 25.7 V C40
2022-06-13 20:00:14 C 12 28 25.392 +44 37 24.67 V B38
2022-06-13 20:03:02 C 12 28 25.29 +44 37 19.7 V C40
2022-06-13 20:05:29 C 12 28 25.40 +44 37 17.0 V C40
2022-06-13 20:10:25 C 12 28 25.64 +44 37 11.5 V C40
2022-06-13 20:10:45 C 12 28 25.67 +44 37 11.0 V C40
2022-06-13 20:12:03 C 12 28 26.016 +44 37 11.24 V B38
2022-06-13 20:20:00 C 12 28 26.357 +44 37 02.35 V B38
2022-06-13 20:25:54 C 12 28 26.41 +44 36 54.0 V C40
2022-06-13 20:26:36 C 12 28 26.44 +44 36 53.2 V C40
2022-06-13 20:32:55 C 12 28 26.75 +44 36 46.1 V C40
2022-06-13 20:34:20 C 12 28 26.81 +44 36 44.6 V C40
2022-06-13 20:35:45 C 12 28 26.88 +44 36 43.0 V C40
2022-06-13 20:43:08 C 12 28 27.25 +44 36 34.6 V C40
2022-06-13 20:45:56 C 12 28 27.37 +44 36 31.6 V C40
2022-06-13 20:49:38 C 12 28 27.888 +44 36 29.38 t A16
2022-06-13 21:10:24 C 12 28 28.894 +44 36 06.08 t A16
2022-06-13 21:26:20 C 12 28 29.67 +44 35 47.6 V C23
2022-06-13 21:30:39 C 12 28 29.89 +44 35 42.7 V C23
2022-06-13 21:31:09 C 12 28 29.899 +44 35 43.01 t A16
2022-06-13 21:36:02 C 12 28 30.16 +44 35 36.7 V C23
2022-06-16 19:01:50 C 12 32 04.06 +43 19 14.7 V C40
2022-06-16 19:02:13 C 12 32 04.07 +43 19 14.2 V C40
2022-06-16 19:03:16 C 12 32 04.13 +43 19 13.1 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)