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
2025-06-26 22:30:56 C 13 11 46.09 +44 16 38.0 X D04
2025-06-27 05:59:46 C 13 11 52.714 +44 08 03.88 V 703
2025-06-27 06:06:22 C 13 11 52.710 +44 07 52.25 V 703
2025-06-27 06:09:40 C 13 11 52.760 +44 07 48.29 V 703
2025-06-27 19:08:08 C 13 12 04.86 +43 52 38.1 X C40
2025-06-27 19:10:33 C 13 12 04.89 +43 52 35.2 X C40
2025-06-27 19:12:57 C 13 12 04.91 +43 52 32.4 X C40
2025-06-27 19:15:22 C 13 12 04.94 +43 52 29.5 X C40
2025-06-27 19:16:46 B 13 12 04.97 +43 52 27.2 X L76
2025-06-27 19:17:46 C 13 12 04.97 +43 52 26.6 X C40
2025-06-27 19:20:10 C 13 12 05.01 +43 52 23.8 X C40
2025-06-27 19:21:57 B 13 12 05.04 +43 52 21.0 X L76
2025-06-27 19:22:35 C 13 12 05.03 +43 52 20.9 X C40
2025-06-27 19:25:00 C 13 12 05.07 +43 52 18.1 X C40
2025-06-27 19:27:08 B 13 12 05.09 +43 52 14.9 X L76
2025-06-27 19:27:19 C 13 12 05.10 +43 52 15.2 X C40
2025-06-27 19:29:32 C 13 12 05.12 +43 52 12.6 X C40
2025-06-27 19:31:44 C 13 12 05.15 +43 52 10.0 X C40
2025-06-27 19:32:19 B 13 12 05.17 +43 52 08.7 X L76
2025-06-27 19:33:56 C 13 12 05.19 +43 52 07.3 X C40
2025-06-27 19:37:29 B 13 12 05.25 +43 52 02.5 X L76
2025-06-27 19:42:40 B 13 12 05.32 +43 51 56.4 X L76
2025-06-27 21:20:01 C 13 12 06.962 +43 50 02.87 Z C23
2025-06-27 21:31:47 C 13 12 06.85 +43 49 46.7 X D04
2025-06-27 21:41:32 C 13 12 06.99 +43 49 35.3 X D04
2025-06-27 21:46:25 C 13 12 07.09 +43 49 29.6 X D04
2025-06-27 21:51:02 C 13 12 07.10 +43 49 23.7 X D04
2025-06-27 21:55:22 C 13 12 07.17 +43 49 18.3 X D04
2025-06-27 21:59:42 C 13 12 07.28 +43 49 13.4 X D04
2025-06-27 22:04:02 C 13 12 07.29 +43 49 08.2 X D04
2025-06-27 22:08:23 C 13 12 07.38 +43 49 03.3 X D04
2025-06-27 22:12:43 C 13 12 07.45 +43 48 57.6 X D04
2025-06-27 22:17:03 C 13 12 07.57 +43 48 52.2 X D04
2025-06-27 22:19:16 C 13 12 07.738 +43 48 52.67 Z C23
2025-06-27 22:21:23 C 13 12 07.59 +43 48 47.5 X D04
2025-06-27 23:19:21 C 13 12 08.623 +43 47 40.63 Z C23
2025-06-28 16:35:18 B 13 12 25.562 +43 27 38.30 W M73
2025-06-28 16:40:28 B 13 12 25.622 +43 27 32.22 W M73
2025-06-28 16:42:54 B 13 12 25.668 +43 27 29.23 W M73
2025-06-28 16:45:06 B 13 12 25.666 +43 27 26.75 W M73
2025-06-28 19:56:57 C 13 12 28.882 +43 23 37.57 W B38
2025-06-28 20:00:52 C 13 12 28.932 +43 23 33.00 W B38
2025-06-28 20:07:21 C 13 12 29.035 +43 23 25.22 W B38
2025-06-28 20:13:48 C 13 12 29.105 +43 23 17.48 W B38
2025-06-28 21:15:22 B 13 12 30.187 +43 22 09.41 W J51
2025-06-28 21:25:32 B 13 12 30.334 +43 21 57.46 W J51
2025-06-28 21:35:41 B 13 12 30.492 +43 21 45.32 W J51
2025-06-29 05:28:59 C 13 12 38.164 +43 12 28.30 V 703
2025-06-29 05:32:16 C 13 12 38.207 +43 12 24.41 V 703
2025-06-29 05:35:33 C 13 12 38.254 +43 12 20.56 V 703
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)