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
2022-05-30 20:21:04 C 12 12 15.82 +50 55 04.7 V C40
2022-05-30 20:22:09 C 12 12 15.85 +50 55 03.4 V C40
2022-05-30 20:22:30 C 12 12 15.88 +50 55 03.1 V C40
2022-05-30 20:24:58 C 12 12 15.98 +50 55 00.1 V C40
2022-05-30 20:25:20 C 12 12 16.00 +50 54 59.7 V C40
2022-05-30 20:27:37 C 12 12 16.10 +50 54 57.0 V C40
2022-05-30 20:28:20 C 12 12 16.12 +50 54 56.1 V C40
2022-05-30 20:28:41 C 12 12 16.14 +50 54 55.6 V C40
2022-05-30 20:29:24 C 12 12 16.17 +50 54 54.9 V C40
2022-05-30 20:29:44 C 12 12 16.19 +50 54 54.5 V C40
2022-05-30 20:30:07 C 12 12 16.20 +50 54 54.1 V C40
2022-05-30 20:30:50 C 12 12 16.23 +50 54 53.2 V C40
2022-05-30 20:32:58 C 12 12 16.31 +50 54 50.8 V C40
2022-05-30 20:34:01 C 12 12 16.37 +50 54 49.5 V C40
2022-05-30 20:37:12 C 12 12 16.50 +50 54 45.8 V C40
2022-05-30 20:44:57 C 12 12 16.82 +50 54 36.6 V C40
2022-05-30 21:34:31 C 12 12 18.94 +50 53 38.0 V C40
2022-05-30 21:43:44 C 12 12 19.33 +50 53 27.4 V C40
2022-05-31 19:52:20 C 12 13 19.76 +50 28 01.8 V C40
2022-05-31 19:53:23 C 12 13 19.79 +50 28 00.5 V C40
2022-05-31 19:53:44 C 12 13 19.81 +50 28 00.2 V C40
2022-05-31 19:56:54 C 12 13 19.94 +50 27 56.4 V C40
2022-05-31 19:58:41 C 12 13 20.03 +50 27 54.3 V C40
2022-05-31 19:59:24 C 12 13 20.05 +50 27 53.4 V C40
2022-05-31 19:59:45 C 12 13 20.08 +50 27 53.2 V C40
2022-05-31 20:01:30 C 12 13 20.15 +50 27 51.1 V C40
2022-05-31 20:01:51 C 12 13 20.16 +50 27 50.6 V C40
2022-05-31 20:09:36 C 12 13 20.49 +50 27 41.6 V C40
2022-05-31 20:10:19 C 12 13 20.51 +50 27 40.8 V C40
2022-05-31 20:12:04 C 12 13 20.59 +50 27 38.7 V C40
2022-05-31 20:12:26 C 12 13 20.61 +50 27 38.2 V C40
2022-05-31 20:23:19 C 12 13 21.07 +50 27 25.5 V C40
2022-05-31 20:23:40 C 12 13 21.09 +50 27 25.0 V C40
2022-05-31 20:24:23 C 12 13 21.13 +50 27 24.2 V C40
2022-05-31 20:24:44 C 12 13 21.14 +50 27 23.8 V C40
2022-05-31 20:25:05 C 12 13 21.16 +50 27 23.5 V C40
2022-05-31 20:25:27 C 12 13 21.18 +50 27 22.9 V C40
2022-05-31 20:25:48 C 12 13 21.19 +50 27 22.6 V C40
2022-05-31 20:30:02 C 12 13 21.36 +50 27 17.6 V C40
2022-05-31 20:32:10 C 12 13 21.46 +50 27 15.0 V C40
2022-05-31 20:32:32 C 12 13 21.48 +50 27 14.8 V C40
2022-05-31 20:32:53 C 12 13 21.49 +50 27 14.4 V C40
2022-05-31 20:33:36 C 12 13 21.52 +50 27 13.4 V C40
2022-05-31 20:36:46 C 12 13 21.66 +50 27 09.9 V C40
2022-05-31 20:37:28 C 12 13 21.68 +50 27 08.8 V C40
2022-05-31 20:37:51 C 12 13 21.71 +50 27 08.3 V C40
2022-05-31 20:38:54 C 12 13 21.74 +50 27 07.3 V C40
2022-05-31 20:39:14 C 12 13 21.77 +50 27 06.9 V C40
2022-05-31 20:41:01 C 12 13 21.85 +50 27 04.7 V C40
2022-05-31 20:41:21 C 12 13 21.86 +50 27 04.3 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)