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
2025-04-16 19:02:50 C 16 27 50.398 +64 33 29.25 W M01
2025-04-16 19:04:02 C 16 27 50.022 +64 33 30.12 W M01
2025-04-16 19:05:20 C 16 27 49.713 +64 33 31.61 W M01
2025-04-16 19:57:09 C 16 27 35.429 +64 34 20.06 W M01
2025-04-16 19:59:39 C 16 27 34.743 +64 34 22.39 W M01
2025-04-16 20:02:09 C 16 27 34.056 +64 34 24.72 W M01
2025-04-16 20:06:26 C 16 27 32.815 +64 34 28.47 W M01
2025-04-16 20:08:56 C 16 27 32.120 +64 34 30.78 W M01
2025-04-16 20:11:26 C 16 27 31.425 +64 34 33.08 W M01
2025-04-16 20:56:34 C 16 27 18.877 +64 35 14.87 W M01
2025-04-16 20:59:04 C 16 27 18.177 +64 35 17.16 W M01
2025-04-16 21:01:34 C 16 27 17.477 +64 35 19.46 W M01
2025-04-16 21:53:22 C 16 27 02.872 +64 36 06.30 W M01
2025-04-16 21:55:52 C 16 27 02.170 +64 36 08.59 W M01
2025-04-16 21:58:22 C 16 27 01.467 +64 36 10.87 W M01
2025-04-16 22:50:12 C 16 26 46.750 +64 36 56.82 W M01
2025-04-16 22:52:42 C 16 26 46.041 +64 36 59.03 W M01
2025-04-16 22:55:12 C 16 26 45.331 +64 37 01.25 W M01
2025-04-17 00:04:39 B 16 26 25.23 +64 37 55.1 X L76
2025-04-17 00:19:01 B 16 26 21.17 +64 38 07.2 X L76
2025-04-17 00:33:07 B 16 26 17.18 +64 38 19.0 X L76
2025-04-17 23:03:25 B 16 20 07.95 +64 56 16.4 X L76
2025-04-17 23:08:40 B 16 20 06.46 +64 56 20.5 X L76
2025-04-17 23:13:54 B 16 20 04.96 +64 56 24.5 X L76
2025-04-17 23:19:10 B 16 20 03.47 +64 56 28.5 X L76
2025-04-17 23:24:24 B 16 20 01.98 +64 56 32.6 X L76
2025-04-17 23:29:38 B 16 20 00.48 +64 56 36.5 X L76
2025-04-18 09:28:34 C 16 17 15.353 +65 04 02.03 V 703
2025-04-18 09:31:58 C 16 17 14.374 +65 04 04.40 V 703
2025-04-18 09:35:23 C 16 17 13.409 +65 04 06.89 V 703
2025-04-18 09:38:47 C 16 17 12.397 +65 04 09.26 V 703
2025-04-18 18:45:13 C 16 14 44.031 +65 10 17.79 W M01
2025-04-18 18:45:28 C 16 14 44.003 +65 10 18.00 W M01
2025-04-18 18:47:43 C 16 14 43.331 +65 10 19.71 W M01
2025-04-18 18:47:58 C 16 14 43.308 +65 10 19.90 W M01
2025-04-18 18:50:13 C 16 14 42.631 +65 10 21.63 W M01
2025-04-18 18:50:28 C 16 14 42.614 +65 10 21.79 W M01
2025-04-18 19:12:16 C 16 14 36.505 +65 10 38.39 W M01
2025-04-18 19:14:46 C 16 14 35.775 +65 10 40.21 W M01
2025-04-18 19:17:16 C 16 14 35.074 +65 10 42.09 W M01
2025-04-18 19:22:21 C 16 14 33.659 +65 10 45.37 W M01
2025-04-18 19:24:51 C 16 14 32.957 +65 10 47.31 W M01
2025-04-18 19:27:21 C 16 14 32.254 +65 10 49.25 W M01
2025-04-18 20:00:25 C 16 14 22.926 +65 11 14.35 W M01
2025-04-18 20:02:55 C 16 14 22.220 +65 11 16.23 W M01
2025-04-18 20:05:25 C 16 14 21.515 +65 11 18.11 W M01
2025-04-18 20:09:05 C 16 14 20.466 +65 11 20.89 W M01
2025-04-18 20:09:48 C 16 14 20.165 +65 11 20.74 W M01
2025-04-18 20:11:35 C 16 14 19.757 +65 11 22.75 W M01
2025-04-18 20:12:18 C 16 14 19.443 +65 11 22.48 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)