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
2022-06-16 19:04:40 C 12 32 04.20 +43 19 11.5 V C40
2022-06-16 19:05:21 C 12 32 04.23 +43 19 10.8 V C40
2022-06-16 19:06:04 C 12 32 04.27 +43 19 09.9 V C40
2022-06-16 19:08:11 C 12 32 04.38 +43 19 07.6 V C40
2022-06-16 19:08:31 C 12 32 04.39 +43 19 07.3 V C40
2022-06-16 19:09:14 C 12 32 04.42 +43 19 06.5 V C40
2022-06-16 19:09:35 C 12 32 04.44 +43 19 06.0 V C40
2022-06-16 19:13:05 C 12 32 04.62 +43 19 02.2 V C40
2022-06-16 19:15:34 C 12 32 04.74 +43 18 59.4 V C40
2022-06-16 19:15:55 C 12 32 04.75 +43 18 59.0 V C40
2022-06-16 19:16:15 C 12 32 04.77 +43 18 58.6 V C40
2022-06-16 19:17:41 C 12 32 04.85 +43 18 57.0 V C40
2022-06-16 19:18:02 C 12 32 04.87 +43 18 56.7 V C40
2022-06-16 19:20:28 C 12 32 04.99 +43 18 53.9 V C40
2022-06-16 19:21:32 C 12 32 05.03 +43 18 52.6 V C40
2022-06-16 19:22:35 C 12 32 05.09 +43 18 51.6 V C40
2022-06-16 19:35:36 C 12 32 05.74 +43 18 37.0 V C40
2022-06-16 19:35:57 C 12 32 05.76 +43 18 36.5 V C40
2022-06-16 19:36:40 C 12 32 05.79 +43 18 35.7 V C40
2022-06-16 19:38:26 C 12 32 05.88 +43 18 33.8 V C40
2022-06-16 19:38:47 C 12 32 05.89 +43 18 33.4 V C40
2022-06-16 19:40:10 C 12 32 05.96 +43 18 31.9 V C40
2022-06-16 19:44:24 C 12 32 06.17 +43 18 27.1 V C40
2022-06-16 19:45:07 C 12 32 06.21 +43 18 26.3 V C40
2022-06-16 19:50:23 C 12 32 06.47 +43 18 20.5 V C40
2022-06-16 19:50:45 C 12 32 06.50 +43 18 20.1 V C40
2022-06-16 19:51:48 C 12 32 06.55 +43 18 18.9 V C40
2022-06-16 20:04:49 C 12 32 07.20 +43 18 04.3 V C40
2022-06-16 20:05:09 C 12 32 07.21 +43 18 03.9 V C40
2022-06-16 20:06:33 C 12 32 07.28 +43 18 02.4 V C40
2022-06-16 20:07:16 C 12 32 07.32 +43 18 01.7 V C40
2022-06-16 20:12:53 C 12 32 07.60 +43 17 55.3 V C40
2022-06-16 20:13:36 C 12 32 07.63 +43 17 54.5 V C40
2022-06-16 20:14:39 C 12 32 07.69 +43 17 53.3 V C40
2022-06-16 20:15:00 C 12 32 07.71 +43 17 53.0 V C40
2022-06-16 20:16:03 C 12 32 07.76 +43 17 51.8 V C40
2022-06-16 20:19:56 C 12 32 07.95 +43 17 47.6 V C40
2022-06-17 21:29:19 C 12 33 26.61 +42 50 12.1 V C23
2022-06-17 21:32:47 C 12 33 26.81 +42 50 08.4 V C23
2022-06-17 21:36:50 C 12 33 27.01 +42 50 04.1 V C23
2022-06-18 18:09:32 C 12 34 31.62 +42 27 35.9 V C40
2022-06-18 18:10:56 C 12 34 31.68 +42 27 34.5 V C40
2022-06-18 18:11:18 C 12 34 31.71 +42 27 34.2 V C40
2022-06-18 18:11:38 C 12 34 31.71 +42 27 33.7 V C40
2022-06-18 18:11:59 C 12 34 31.73 +42 27 33.2 V C40
2022-06-18 18:13:03 C 12 34 31.79 +42 27 32.0 V C40
2022-06-18 18:15:52 C 12 34 31.93 +42 27 28.9 V C40
2022-06-18 18:16:13 C 12 34 31.95 +42 27 28.6 V C40
2022-06-18 18:22:34 C 12 34 32.26 +42 27 21.6 V C40
2022-06-18 18:28:11 C 12 34 32.54 +42 27 15.2 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)