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
2022-07-26 06:57:19 C 13 26 06.202 +25 56 23.64 V T05
2022-07-26 07:15:36 C 13 26 07.272 +25 56 02.58 V T05
2022-07-27 06:39:52 C 13 27 32.124 +25 29 22.24 V T08
2022-07-27 06:41:50 C 13 27 32.244 +25 29 20.18 V T08
2022-07-27 06:44:27 C 13 27 32.393 +25 29 16.98 V T08
2022-07-27 06:46:25 C 13 27 32.496 +25 29 13.99 V T08
2022-07-27 06:52:20 C 13 27 32.846 +25 29 07.87 V T08
2022-07-27 06:54:18 C 13 27 32.957 +25 29 05.68 V T08
2022-07-27 07:09:23 C 13 27 33.845 +25 28 48.25 V T08
2022-07-27 17:57:04 C 13 28 13.16 +25 16 24.1 V C40
2022-07-27 17:58:26 C 13 28 13.24 +25 16 22.5 V C40
2022-07-27 17:59:48 C 13 28 13.32 +25 16 21.0 V C40
2022-07-27 18:00:30 C 13 28 13.36 +25 16 20.2 V C40
2022-07-27 18:01:52 C 13 28 13.44 +25 16 18.6 V C40
2022-07-27 18:10:46 C 13 28 13.96 +25 16 08.2 V C40
2022-07-27 18:13:31 C 13 28 14.12 +25 16 05.0 V C40
2022-07-27 18:18:58 C 13 28 14.44 +25 15 58.7 V C40
2022-07-27 18:19:40 C 13 28 14.49 +25 15 57.9 V C40
2022-07-27 18:20:20 C 13 28 14.53 +25 15 57.2 V C40
2022-07-27 18:21:43 C 13 28 14.61 +25 15 55.6 V C40
2022-07-27 18:25:50 C 13 28 14.85 +25 15 50.9 V C40
2022-07-27 18:29:15 C 13 28 15.05 +25 15 46.8 V C40
2022-07-27 18:29:57 C 13 28 15.09 +25 15 46.0 V C40
2022-07-27 18:30:37 C 13 28 15.13 +25 15 45.3 V C40
2022-07-27 18:32:41 C 13 28 15.26 +25 15 43.0 V C40
2022-07-27 18:33:21 C 13 28 15.30 +25 15 42.2 V C40
2022-07-27 18:34:43 C 13 28 15.38 +25 15 40.5 V C40
2022-07-27 18:38:09 C 13 28 15.58 +25 15 36.5 V C40
2022-07-27 18:41:35 C 13 28 15.78 +25 15 32.6 V C40
2022-07-27 18:44:20 C 13 28 15.94 +25 15 29.4 V C40
2022-07-27 18:45:00 C 13 28 15.98 +25 15 28.6 V C40
2022-07-27 18:46:22 C 13 28 16.07 +25 15 27.0 V C40
2022-07-27 18:55:22 C 13 28 16.60 +25 15 16.7 V C40
2022-07-27 18:56:04 C 13 28 16.64 +25 15 15.8 V C40
2022-07-27 18:56:45 C 13 28 16.68 +25 15 15.1 V C40
2022-07-27 19:24:09 C 13 28 18.32 +25 14 43.3 V C40
2022-07-27 19:30:59 C 13 28 18.73 +25 14 35.4 V C40
2022-07-27 19:35:05 C 13 28 18.98 +25 14 30.6 V C40
2022-07-27 19:40:35 C 13 28 19.31 +25 14 24.2 V C40
2022-07-27 19:43:19 C 13 28 19.47 +25 14 21.0 V C40
2022-07-27 19:54:58 C 13 28 20.18 +25 14 07.5 V C40
2022-07-28 18:47:38 C 13 29 43.18 +24 47 54.8 V C40
2022-07-28 18:51:03 C 13 29 43.39 +24 47 50.8 V C40
2022-07-28 18:51:45 C 13 29 43.43 +24 47 50.1 V C40
2022-07-28 18:55:52 C 13 29 43.67 +24 47 45.2 V C40
2022-07-28 19:01:19 C 13 29 44.00 +24 47 38.9 V C40
2022-07-28 19:04:04 C 13 29 44.16 +24 47 35.7 V C40
2022-07-28 19:22:34 C 13 29 45.27 +24 47 14.3 V C40
2022-07-28 19:28:03 C 13 29 45.59 +24 47 07.9 V C40
2022-07-28 19:34:53 C 13 29 46.00 +24 46 59.9 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)