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
2025-04-20 01:20:53 C 16 06 09.962 +65 29 40.67 W M01
2025-04-20 01:26:24 C 16 06 08.356 +65 29 43.65 W M01
2025-04-20 01:28:54 C 16 06 07.629 +65 29 45.00 W M01
2025-04-20 01:31:24 C 16 06 06.902 +65 29 46.36 W M01
2025-04-20 01:37:02 C 16 06 05.239 +65 29 49.26 W M01
2025-04-20 01:37:27 C 16 06 05.154 +65 29 49.62 W M01
2025-04-20 01:39:32 C 16 06 04.514 +65 29 50.59 W M01
2025-04-20 01:39:57 C 16 06 04.428 +65 29 50.98 W M01
2025-04-20 01:42:02 C 16 06 03.789 +65 29 51.92 W M01
2025-04-20 01:42:27 C 16 06 03.702 +65 29 52.35 W M01
2025-04-20 01:47:58 C 16 06 02.102 +65 29 55.22 W M01
2025-04-20 01:50:28 C 16 06 01.374 +65 29 56.57 W M01
2025-04-20 01:52:58 C 16 06 00.646 +65 29 57.91 W M01
2025-04-20 18:13:30 C 16 01 31.802 +65 38 33.79 W M01
2025-04-20 18:16:00 C 16 01 31.104 +65 38 35.32 W M01
2025-04-20 18:18:30 C 16 01 30.405 +65 38 36.85 W M01
2025-04-20 18:24:17 C 16 01 28.780 +65 38 40.19 W M01
2025-04-20 18:26:47 C 16 01 28.079 +65 38 41.66 W M01
2025-04-20 18:29:17 C 16 01 27.378 +65 38 43.14 W M01
2025-04-20 18:35:09 C 16 01 25.686 +65 38 45.95 W M01
2025-04-20 18:37:39 C 16 01 24.984 +65 38 47.33 W M01
2025-04-20 18:40:09 C 16 01 24.282 +65 38 48.72 W M01
2025-04-20 19:01:53 C 16 01 18.162 +65 39 01.39 W M01
2025-04-20 19:04:23 C 16 01 17.457 +65 39 02.82 W M01
2025-04-20 19:06:53 C 16 01 16.752 +65 39 04.26 W M01
2025-04-20 19:47:45 C 16 01 05.094 +65 39 28.10 W M01
2025-04-20 19:50:15 C 16 01 04.384 +65 39 29.52 W M01
2025-04-20 19:52:45 C 16 01 03.673 +65 39 30.93 W M01
2025-04-20 19:56:17 C 16 01 02.581 +65 39 32.28 W M01
2025-04-20 19:58:19 C 16 01 02.080 +65 39 33.77 W M01
2025-04-20 19:58:47 C 16 01 01.855 +65 39 33.62 W M01
2025-04-20 20:00:49 C 16 01 01.366 +65 39 35.18 W M01
2025-04-20 20:01:17 C 16 01 01.129 +65 39 34.96 W M01
2025-04-20 20:03:19 C 16 01 00.652 +65 39 36.59 W M01
2025-04-20 20:31:38 C 16 00 52.493 +65 39 52.80 W M01
2025-04-20 20:34:08 C 16 00 51.784 +65 39 54.20 W M01
2025-04-20 20:36:38 C 16 00 51.075 +65 39 55.59 W M01
2025-04-20 20:44:19 C 16 00 48.868 +65 39 59.98 W M01
2025-04-20 20:46:49 C 16 00 48.151 +65 40 01.37 W M01
2025-04-20 20:49:19 C 16 00 47.433 +65 40 02.76 W M01
2025-04-20 20:54:56 C 16 00 45.811 +65 40 05.34 W M01
2025-04-20 20:57:26 C 16 00 45.088 +65 40 06.73 W M01
2025-04-20 20:59:56 C 16 00 44.366 +65 40 08.11 W M01
2025-04-20 21:01:25 C 16 00 43.857 +65 40 08.63 W M01
2025-04-20 21:03:55 C 16 00 43.130 +65 40 09.95 W M01
2025-04-20 21:06:25 C 16 00 42.402 +65 40 11.26 W M01
2025-04-20 21:37:38 C 16 00 33.423 +65 40 28.83 W M01
2025-04-20 21:40:08 C 16 00 32.697 +65 40 30.15 W M01
2025-04-20 21:42:38 C 16 00 31.971 +65 40 31.48 W M01
2025-04-20 22:08:55 C 16 00 24.275 +65 40 44.86 W M01
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)