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
2022-07-15 20:23:03 C 13 11 06.54 +30 36 55.1 V C40
2022-07-15 20:48:37 C 13 11 08.245 +30 36 32.24 X J13
2022-07-15 20:49:26 C 13 11 08.294 +30 36 31.22 X J13
2022-07-15 20:50:14 C 13 11 08.343 +30 36 30.30 X J13
2022-07-15 20:51:03 C 13 11 08.384 +30 36 29.42 X J13
2022-07-15 20:51:52 C 13 11 08.433 +30 36 28.51 X J13
2022-07-15 20:52:40 C 13 11 08.474 +30 36 27.62 X J13
2022-07-15 20:53:29 C 13 11 08.521 +30 36 26.78 X J13
2022-07-15 20:54:18 C 13 11 08.571 +30 36 25.77 X J13
2022-07-15 20:55:06 C 13 11 08.610 +30 36 24.92 X J13
2022-07-15 20:55:55 C 13 11 08.663 +30 36 24.01 X J13
2022-07-15 21:04:53 C 13 11 08.98 +30 36 09.4 V C40
2022-07-15 21:18:18 C 13 11 09.84 +30 35 55.2 V K83
2022-07-15 21:21:31 C 13 11 10.00 +30 35 51.6 V K83
2022-07-15 21:25:50 C 13 11 10.27 +30 35 46.7 V K83
2022-07-16 07:03:05 C 13 11 44.453 +30 25 13.58 V T08
2022-07-16 07:08:21 C 13 11 44.767 +30 25 07.79 V T08
2022-07-16 07:18:11 C 13 11 45.322 +30 24 56.74 V T08
2022-07-16 07:33:58 C 13 11 46.217 +30 24 39.06 V T08
2022-07-16 20:48:37 C 13 12 33.597 +30 09 59.14 X J13
2022-07-16 20:49:25 C 13 12 33.640 +30 09 58.21 X J13
2022-07-16 20:50:14 C 13 12 33.690 +30 09 57.30 X J13
2022-07-16 20:51:03 C 13 12 33.734 +30 09 56.41 X J13
2022-07-16 20:51:52 C 13 12 33.780 +30 09 55.45 X J13
2022-07-16 20:52:40 C 13 12 33.826 +30 09 54.60 X J13
2022-07-16 20:53:29 C 13 12 33.870 +30 09 53.66 X J13
2022-07-16 20:54:18 C 13 12 33.922 +30 09 52.74 X J13
2022-07-16 20:55:06 C 13 12 33.966 +30 09 51.81 X J13
2022-07-16 20:55:55 C 13 12 34.015 +30 09 50.90 X J13
2022-07-18 06:50:13 C 13 14 34.781 +29 32 15.32 V T05
2022-07-18 06:54:47 C 13 14 35.035 +29 32 10.21 V T05
2022-07-18 07:04:35 C 13 14 35.599 +29 31 59.12 V T05
2022-07-18 07:18:56 C 13 14 36.437 +29 31 43.10 V T05
2022-07-18 18:08:02 C 13 15 15.25 +29 19 37.5 V C40
2022-07-18 18:12:38 C 13 15 15.52 +29 19 32.4 V C40
2022-07-18 18:13:21 C 13 15 15.56 +29 19 31.5 V C40
2022-07-18 18:18:50 C 13 15 15.87 +29 19 25.3 V C40
2022-07-18 18:20:12 C 13 15 15.96 +29 19 23.8 V C40
2022-07-18 18:22:15 C 13 15 16.08 +29 19 21.5 V C40
2022-07-18 18:24:59 C 13 15 16.24 +29 19 18.4 V C40
2022-07-18 18:27:02 C 13 15 16.35 +29 19 16.1 V C40
2022-07-18 18:27:44 C 13 15 16.39 +29 19 15.3 V C40
2022-07-18 18:35:15 C 13 15 16.83 +29 19 06.8 V C40
2022-07-18 18:35:57 C 13 15 16.87 +29 19 06.1 V C40
2022-07-18 18:40:45 C 13 15 17.15 +29 19 00.7 V C40
2022-07-18 18:41:25 C 13 15 17.19 +29 18 59.9 V C40
2022-07-18 18:42:07 C 13 15 17.23 +29 18 59.2 V C40
2022-07-18 18:46:12 C 13 15 17.47 +29 18 54.6 V C40
2022-07-18 21:11:07 C 13 15 26.13 +29 16 12.2 V C23
2022-07-18 21:15:25 C 13 15 26.38 +29 16 07.0 V C23
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)