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
2025-06-25 19:16:57 C 13 11 23.96 +44 48 27.6 X C40
2025-06-25 19:19:22 C 13 11 24.00 +44 48 24.8 X C40
2025-06-25 19:21:46 C 13 11 24.02 +44 48 21.9 X C40
2025-06-25 19:24:10 C 13 11 24.05 +44 48 19.0 X C40
2025-06-25 19:26:35 C 13 11 24.07 +44 48 16.2 X C40
2025-06-25 19:28:59 C 13 11 24.09 +44 48 13.3 X C40
2025-06-25 19:31:17 C 13 11 24.12 +44 48 10.6 X C40
2025-06-25 19:33:30 C 13 11 24.14 +44 48 08.0 X C40
2025-06-25 19:35:43 C 13 11 24.18 +44 48 05.3 X C40
2025-06-25 19:37:56 C 13 11 24.19 +44 48 02.7 X C40
2025-06-25 19:57:04 C 13 11 24.672 +44 47 42.50 W B38
2025-06-25 20:05:15 C 13 11 24.701 +44 47 32.64 W B38
2025-06-25 20:12:52 C 13 11 24.792 +44 47 23.42 W B38
2025-06-25 20:19:22 C 13 11 24.890 +44 47 15.79 W B38
2025-06-25 21:38:40 C 13 11 25.966 +44 45 47.41 V R17
2025-06-25 21:59:01 C 13 11 26.153 +44 45 23.36 V R17
2025-06-25 22:05:26 C 13 11 26.13 +44 45 12.3 X Z03
2025-06-25 22:19:24 C 13 11 26.338 +44 44 59.24 V R17
2025-06-25 22:45:30 C 13 11 26.582 +44 44 28.28 V R17
2025-06-25 22:51:56 C 13 11 26.62 +44 44 17.2 X Z03
2025-06-25 23:37:01 C 13 11 27.12 +44 43 23.5 X Z03
2025-06-26 18:59:32 C 13 11 43.39 +44 20 49.6 X C40
2025-06-26 19:01:56 C 13 11 43.40 +44 20 46.9 X C40
2025-06-26 19:04:21 C 13 11 43.43 +44 20 44.0 X C40
2025-06-26 19:06:46 C 13 11 43.45 +44 20 41.1 X C40
2025-06-26 19:09:11 C 13 11 43.48 +44 20 38.2 X C40
2025-06-26 19:11:35 C 13 11 43.49 +44 20 35.4 X C40
2025-06-26 19:14:00 C 13 11 43.54 +44 20 32.5 X C40
2025-06-26 19:16:25 C 13 11 43.56 +44 20 29.6 X C40
2025-06-26 19:18:43 C 13 11 43.59 +44 20 26.8 X C40
2025-06-26 19:20:55 C 13 11 43.61 +44 20 24.3 X C40
2025-06-26 19:23:08 C 13 11 43.64 +44 20 21.6 X C40
2025-06-26 19:25:21 C 13 11 43.67 +44 20 19.0 X C40
2025-06-26 19:29:24 B 13 11 43.73 +44 20 14.0 X L76
2025-06-26 19:34:35 B 13 11 43.80 +44 20 07.7 X L76
2025-06-26 19:39:46 B 13 11 43.87 +44 20 01.5 X L76
2025-06-26 19:44:57 B 13 11 43.94 +44 19 55.4 X L76
2025-06-26 19:50:08 B 13 11 44.00 +44 19 49.2 X L76
2025-06-26 19:54:48 B 13 11 44.05 +44 19 43.7 X L76
2025-06-26 21:41:13 C 13 11 45.39 +44 17 37.6 X D04
2025-06-26 21:46:07 C 13 11 45.50 +44 17 31.1 X D04
2025-06-26 21:51:00 C 13 11 45.54 +44 17 25.0 X D04
2025-06-26 21:55:54 C 13 11 45.57 +44 17 20.1 X D04
2025-06-26 22:00:32 C 13 11 45.67 +44 17 14.6 X D04
2025-06-26 22:04:53 C 13 11 45.69 +44 17 08.4 X D04
2025-06-26 22:09:14 C 13 11 45.78 +44 17 04.3 X D04
2025-06-26 22:13:34 C 13 11 45.88 +44 16 58.6 X D04
2025-06-26 22:17:55 C 13 11 45.87 +44 16 53.7 X D04
2025-06-26 22:22:15 C 13 11 45.99 +44 16 48.7 X D04
2025-06-26 22:26:36 C 13 11 46.07 +44 16 42.7 X D04
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)