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
2025-04-29 23:03:26 B 15 02 01.229 +66 09 49.10 V L65
2025-04-29 23:05:00 C 15 02 01.056 +66 09 49.43 Z C23
2025-04-29 23:43:39 B 15 01 49.77 +66 09 42.1 X L76
2025-04-29 23:48:53 B 15 01 48.43 +66 09 40.9 X L76
2025-04-29 23:54:08 B 15 01 47.08 +66 09 39.8 X L76
2025-04-29 23:59:22 B 15 01 45.73 +66 09 38.6 X L76
2025-04-30 00:04:36 B 15 01 44.39 +66 09 37.4 X L76
2025-04-30 00:09:51 B 15 01 43.04 +66 09 36.2 X L76
2025-04-30 02:00:36 C 15 01 15.989 +66 09 13.86 q C18
2025-04-30 02:44:42 C 15 01 04.747 +66 09 03.85 q C18
2025-04-30 21:04:20 B 14 56 36.557 +66 04 51.38 V L65
2025-04-30 21:30:55 C 14 56 30.046 +66 04 45.66 Z C23
2025-04-30 22:04:03 C 14 56 21.751 +66 04 37.92 Z C23
2025-04-30 23:33:04 B 14 55 59.299 +66 04 15.85 V L65
2025-05-01 00:39:04 B 14 55 42.758 +66 03 58.39 V L65
2025-05-01 02:04:11 B 14 55 22.106 +66 03 43.24 W J51
2025-05-01 02:10:43 B 14 55 20.448 +66 03 41.36 W J51
2025-05-01 02:16:43 B 14 55 18.910 +66 03 39.78 W J51
2025-05-01 11:26:53 C 14 53 04.974 +66 00 59.58 V 703
2025-05-01 11:29:55 C 14 53 04.272 +66 00 58.57 V 703
2025-05-01 11:32:58 C 14 53 03.527 +66 00 57.67 V 703
2025-05-01 11:36:01 C 14 53 02.785 +66 00 56.66 V 703
2025-05-01 22:44:04 B 14 50 26.662 +65 57 34.85 V L65
2025-05-01 22:48:15 B 14 50 25.639 +65 57 33.59 V L65
2025-05-01 22:52:26 B 14 50 24.598 +65 57 32.33 V L65
2025-05-01 23:41:19 C 14 50 12.77 +65 57 18.1 V D48
2025-05-01 23:47:47 C 14 50 11.18 +65 57 16.0 V D48
2025-05-01 23:54:15 C 14 50 09.61 +65 57 14.0 V D48
2025-05-02 10:53:01 C 14 47 35.263 +65 53 42.79 V T08
2025-05-02 11:00:24 C 14 47 33.458 +65 53 40.13 V T08
2025-05-02 11:47:51 C 14 47 21.845 +65 53 22.78 V T08
2025-05-02 11:52:36 C 14 47 20.702 +65 53 21.16 V T08
2025-05-02 23:10:40 B 14 44 45.696 +65 49 07.68 V L65
2025-05-02 23:43:32 B 14 44 37.932 +65 48 55.33 V L65
2025-05-03 00:17:56 B 14 44 29.810 +65 48 42.16 V L65
2025-05-03 00:56:07 C 14 44 21.638 +65 48 35.17 V R17
2025-05-03 01:16:38 C 14 44 16.718 +65 48 27.36 V R17
2025-05-03 01:37:11 C 14 44 11.803 +65 48 19.51 V R17
2025-05-03 01:57:43 C 14 44 06.893 +65 48 11.38 V R17
2025-05-03 08:48:00 C 14 42 33.541 +65 45 30.06 V 703
2025-05-03 08:51:24 C 14 42 32.738 +65 45 28.76 V 703
2025-05-03 08:54:49 C 14 42 31.954 +65 45 27.25 V 703
2025-05-03 08:58:13 C 14 42 31.136 +65 45 25.96 V 703
2025-05-04 01:01:32 B 14 38 57.353 +65 38 48.55 W J51
2025-05-04 01:08:13 B 14 38 55.807 +65 38 45.53 W J51
2025-05-04 01:15:25 B 14 38 54.154 +65 38 42.47 W J51
2025-05-04 11:32:41 C 14 36 38.455 +65 34 09.34 V T05
2025-05-04 12:04:06 C 14 36 31.306 +65 33 54.22 V T05
2025-05-04 12:44:57 C 14 36 22.034 +65 33 33.98 V T05
2025-05-04 13:20:32 C 14 36 14.009 +65 33 16.09 V T05
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)