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
2025-06-19 22:19:43 C 13 10 09.134 +47 31 45.48 V R17
2025-06-19 22:34:46 C 13 10 09.074 +47 31 21.47 Z C23
2025-06-19 22:44:29 C 13 10 09.125 +47 31 16.50 V R17
2025-06-20 05:32:34 C 13 10 10.924 +47 23 25.15 V 703
2025-06-20 05:35:53 C 13 10 10.938 +47 23 21.16 V 703
2025-06-20 05:39:11 C 13 10 10.942 +47 23 17.16 V 703
2025-06-20 05:42:30 C 13 10 10.931 +47 23 13.49 V 703
2025-06-20 17:59:22 C 13 10 15.396 +47 09 07.31 V 088
2025-06-20 18:01:04 C 13 10 15.408 +47 09 05.36 V 088
2025-06-20 18:02:32 C 13 10 15.408 +47 09 03.78 V 088
2025-06-20 18:04:20 C 13 10 15.403 +47 09 01.66 V 088
2025-06-20 18:04:58 C 13 10 15.418 +47 09 01.08 V 088
2025-06-20 18:05:36 C 13 10 15.425 +47 09 00.04 V 088
2025-06-20 18:06:12 C 13 10 15.403 +47 08 59.50 V 088
2025-06-20 18:07:03 C 13 10 15.418 +47 08 58.49 V 088
2025-06-20 18:07:55 C 13 10 15.413 +47 08 57.41 V 088
2025-06-20 18:08:47 C 13 10 15.439 +47 08 56.94 V 088
2025-06-21 07:11:15 C 13 10 20.002 +46 53 54.82 V T05
2025-06-21 07:15:53 C 13 10 20.011 +46 53 49.38 V T05
2025-06-21 07:26:36 C 13 10 20.021 +46 53 36.85 V T05
2025-06-21 07:32:37 C 13 10 20.042 +46 53 29.76 V T05
2025-06-21 08:59:35 C 13 10 20.263 +46 51 47.12 V T05
2025-06-21 19:48:21 C 13 10 25.09 +46 39 13.4 X C40
2025-06-21 19:50:46 C 13 10 25.10 +46 39 10.4 X C40
2025-06-21 19:53:11 C 13 10 25.13 +46 39 07.6 X C40
2025-06-21 19:55:35 C 13 10 25.14 +46 39 04.8 X C40
2025-06-21 19:57:59 C 13 10 25.14 +46 39 02.0 X C40
2025-06-21 20:00:24 C 13 10 25.14 +46 38 59.0 X C40
2025-06-21 20:02:49 C 13 10 25.17 +46 38 56.3 X C40
2025-06-21 20:05:13 C 13 10 25.20 +46 38 53.4 X C40
2025-06-21 20:07:31 C 13 10 25.18 +46 38 50.7 X C40
2025-06-21 20:09:43 C 13 10 25.20 +46 38 48.1 X C40
2025-06-21 20:11:56 C 13 10 25.21 +46 38 45.6 X C40
2025-06-21 20:14:09 C 13 10 25.23 +46 38 43.0 X C40
2025-06-21 21:49:12 C 13 10 25.896 +46 36 51.66 Z C23
2025-06-21 23:05:59 C 13 10 26.496 +46 35 22.49 Z C23
2025-06-22 06:19:24 C 13 10 29.723 +46 27 05.36 V 703
2025-06-22 06:22:27 C 13 10 29.759 +46 27 01.91 V 703
2025-06-22 06:25:29 C 13 10 29.780 +46 26 58.31 V 703
2025-06-22 06:28:32 C 13 10 29.773 +46 26 54.60 V 703
2025-06-22 19:38:46 B 13 10 36.77 +46 11 38.4 X L76
2025-06-22 19:43:57 B 13 10 36.79 +46 11 32.2 X L76
2025-06-22 19:49:07 B 13 10 36.83 +46 11 26.2 X L76
2025-06-22 19:54:19 B 13 10 36.87 +46 11 20.0 X L76
2025-06-22 19:55:24 C 13 10 36.85 +46 11 19.2 X C40
2025-06-22 19:57:49 C 13 10 36.86 +46 11 16.3 X C40
2025-06-22 19:59:29 B 13 10 36.90 +46 11 13.8 X L76
2025-06-22 20:00:13 C 13 10 36.88 +46 11 13.5 X C40
2025-06-22 20:02:37 C 13 10 36.90 +46 11 10.7 X C40
2025-06-22 20:04:09 B 13 10 36.93 +46 11 08.4 X L76
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)