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
2022-04-25 22:25:40 C 11 42 50.72 +69 31 27.1 V C40
2022-04-25 22:26:43 C 11 42 50.71 +69 31 25.3 V C40
2022-04-25 22:27:47 C 11 42 50.74 +69 31 23.5 V C40
2022-04-25 22:28:09 C 11 42 50.76 +69 31 22.8 V C40
2022-04-25 22:28:31 C 11 42 50.77 +69 31 22.3 V C40
2022-04-26 19:28:19 C 11 43 22.49 +68 56 33.5 V C40
2022-04-26 19:29:02 C 11 43 22.52 +68 56 32.5 V C40
2022-04-26 19:30:05 C 11 43 22.53 +68 56 30.8 V C40
2022-04-26 19:31:08 C 11 43 22.52 +68 56 29.1 V C40
2022-04-26 19:31:29 C 11 43 22.53 +68 56 28.5 V C40
2022-04-26 19:32:12 C 11 43 22.55 +68 56 27.3 V C40
2022-04-26 19:34:19 C 11 43 22.58 +68 56 23.7 V C40
2022-04-26 19:34:39 C 11 43 22.59 +68 56 23.1 V C40
2022-04-26 19:35:02 C 11 43 22.59 +68 56 22.5 V C40
2022-04-26 19:35:23 C 11 43 22.60 +68 56 21.9 V C40
2022-04-26 19:36:27 C 11 43 22.61 +68 56 20.3 V C40
2022-04-26 19:37:09 C 11 43 22.61 +68 56 19.1 V C40
2022-04-26 19:37:51 C 11 43 22.63 +68 56 17.8 V C40
2022-04-26 19:38:13 C 11 43 22.63 +68 56 17.2 V C40
2022-04-26 19:38:34 C 11 43 22.62 +68 56 16.7 V C40
2022-04-26 19:55:37 C 11 43 22.87 +68 55 48.3 V C40
2022-04-26 19:56:20 C 11 43 22.87 +68 55 47.2 V C40
2022-04-26 19:56:40 C 11 43 22.86 +68 55 46.5 V C40
2022-04-26 19:57:01 C 11 43 22.86 +68 55 45.9 V C40
2022-04-26 19:57:23 C 11 43 22.90 +68 55 45.4 V C40
2022-04-26 19:57:44 C 11 43 22.89 +68 55 44.8 V C40
2022-04-26 19:58:05 C 11 43 22.91 +68 55 44.3 V C40
2022-04-26 19:58:27 C 11 43 22.91 +68 55 43.7 V C40
2022-04-26 19:58:48 C 11 43 22.91 +68 55 43.1 V C40
2022-04-26 19:59:09 C 11 43 22.90 +68 55 42.4 V C40
2022-04-26 19:59:31 C 11 43 22.91 +68 55 41.8 V C40
2022-04-26 19:59:52 C 11 43 22.91 +68 55 41.3 V C40
2022-04-26 20:00:14 C 11 43 22.92 +68 55 40.7 V C40
2022-04-26 20:00:35 C 11 43 22.93 +68 55 40.1 V C40
2022-04-26 20:01:16 C 11 43 22.92 +68 55 38.9 V C40
2022-04-26 20:01:38 C 11 43 22.95 +68 55 38.3 V C40
2022-04-26 20:01:59 C 11 43 22.94 +68 55 37.8 V C40
2022-04-26 20:03:02 C 11 43 22.96 +68 55 35.9 V C40
2022-04-26 20:04:06 C 11 43 22.96 +68 55 34.2 V C40
2022-04-26 20:04:28 C 11 43 22.99 +68 55 33.7 V C40
2022-04-26 20:04:50 C 11 43 22.99 +68 55 33.0 V C40
2022-04-26 20:05:10 C 11 43 22.98 +68 55 32.5 V C40
2022-04-26 20:10:16 C 11 43 23.05 +68 55 24.0 V C40
2022-04-26 20:10:58 C 11 43 23.07 +68 55 22.9 V C40
2022-04-26 20:11:19 C 11 43 23.09 +68 55 22.1 V C40
2022-04-26 20:11:42 C 11 43 23.08 +68 55 21.5 V C40
2022-04-26 20:12:02 C 11 43 23.07 +68 55 21.0 V C40
2022-04-26 20:12:23 C 11 43 23.09 +68 55 20.4 V C40
2022-04-26 20:13:26 C 11 43 23.09 +68 55 18.7 V C40
2022-04-26 20:13:49 C 11 43 23.10 +68 55 18.0 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)