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
2025-07-18 07:15:33 C 13 23 41.383 +34 05 01.79 V T05
2025-07-18 07:23:00 C 13 23 41.590 +34 04 52.50 V T05
2025-07-18 07:44:04 C 13 23 42.108 +34 04 26.15 V T05
2025-07-20 18:08:32 C 13 25 21.85 +32 52 07.3 X C40
2025-07-20 18:10:57 C 13 25 21.92 +32 52 04.3 X C40
2025-07-20 18:13:22 C 13 25 21.98 +32 52 01.2 X C40
2025-07-20 18:15:47 C 13 25 22.05 +32 51 58.1 X C40
2025-07-20 18:18:12 C 13 25 22.11 +32 51 55.1 X C40
2025-07-20 18:20:37 C 13 25 22.17 +32 51 52.0 X C40
2025-07-20 18:23:01 C 13 25 22.23 +32 51 49.0 X C40
2025-07-20 18:25:25 C 13 25 22.30 +32 51 45.9 X C40
2025-07-20 18:27:44 C 13 25 22.36 +32 51 43.0 X C40
2025-07-20 18:29:57 C 13 25 22.43 +32 51 40.2 X C40
2025-07-20 18:32:09 C 13 25 22.49 +32 51 37.5 X C40
2025-07-20 18:34:22 C 13 25 22.54 +32 51 34.6 X C40
2025-07-21 18:20:58 C 13 26 03.18 +32 21 56.7 X C40
2025-07-21 18:23:48 C 13 26 03.25 +32 21 53.0 X C40
2025-07-21 18:26:13 C 13 26 03.32 +32 21 50.1 X C40
2025-07-21 18:28:37 C 13 26 03.40 +32 21 46.9 X C40
2025-07-21 18:31:02 C 13 26 03.45 +32 21 44.1 X C40
2025-07-21 18:33:27 C 13 26 03.54 +32 21 40.8 X C40
2025-07-21 18:35:51 C 13 26 03.59 +32 21 37.9 X C40
2025-07-21 18:38:16 C 13 26 03.65 +32 21 34.8 X C40
2025-07-21 18:40:34 C 13 26 03.73 +32 21 31.7 X C40
2025-07-21 18:42:48 C 13 26 03.77 +32 21 29.0 X C40
2025-07-21 18:45:01 C 13 26 03.83 +32 21 26.3 X C40
2025-07-21 18:47:13 C 13 26 03.88 +32 21 23.5 X C40
2025-07-21 20:41:32 C 13 26 07.21 +32 19 03.5 q I56
2025-07-21 21:04:06 C 13 26 07.73 +32 18 35.1 q I56
2025-07-21 21:10:07 C 13 26 07.89 +32 18 27.0 q I56
2025-07-22 06:59:15 C 13 26 24.648 +32 06 13.21 V T05
2025-07-22 07:03:16 C 13 26 24.756 +32 06 08.06 V T05
2025-07-22 07:29:47 C 13 26 25.452 +32 05 34.33 V T05
2025-07-22 07:37:44 C 13 26 25.634 +32 05 24.14 V T05
2025-07-22 18:11:13 C 13 26 43.91 +31 52 05.6 X C40
2025-07-22 18:13:25 C 13 26 43.96 +31 52 02.6 X C40
2025-07-22 18:15:38 C 13 26 44.01 +31 51 59.8 X C40
2025-07-22 18:17:51 C 13 26 44.08 +31 51 57.1 X C40
2025-07-22 18:20:03 C 13 26 44.13 +31 51 54.2 X C40
2025-07-22 18:22:16 C 13 26 44.19 +31 51 51.4 X C40
2025-07-22 18:24:28 C 13 26 44.25 +31 51 48.5 X C40
2025-07-22 18:26:40 C 13 26 44.32 +31 51 45.8 X C40
2025-07-22 18:28:53 C 13 26 44.38 +31 51 42.9 X C40
2025-07-22 18:31:06 C 13 26 44.43 +31 51 40.2 X C40
2025-07-22 18:33:13 C 13 26 44.49 +31 51 37.3 X C40
2025-07-22 18:35:14 C 13 26 44.55 +31 51 34.9 X C40
2025-07-23 18:04:21 C 13 27 24.58 +31 22 01.7 X C40
2025-07-23 18:06:46 C 13 27 24.63 +31 21 58.4 X C40
2025-07-23 18:09:10 C 13 27 24.71 +31 21 55.5 X C40
2025-07-23 18:11:35 C 13 27 24.78 +31 21 52.3 X C40
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)