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
2025-07-03 06:54:11 C 13 14 30.086 +41 18 00.00 V T05
2025-07-03 07:01:43 C 13 14 30.218 +41 17 51.04 V T05
2025-07-03 07:07:00 C 13 14 30.307 +41 17 44.59 V T05
2025-07-03 07:43:02 C 13 14 30.934 +41 17 01.39 V T05
2025-07-03 20:07:09 C 13 14 46.74 +41 02 16.2 X C40
2025-07-03 20:09:34 C 13 14 46.79 +41 02 13.3 X C40
2025-07-03 20:11:59 C 13 14 46.84 +41 02 10.5 X C40
2025-07-03 20:14:24 C 13 14 46.88 +41 02 07.5 X C40
2025-07-03 20:16:49 C 13 14 46.93 +41 02 04.6 X C40
2025-07-03 20:19:14 C 13 14 46.99 +41 02 01.8 X C40
2025-07-03 20:21:38 C 13 14 47.03 +41 01 58.7 X C40
2025-07-03 20:24:03 C 13 14 47.08 +41 01 56.0 X C40
2025-07-03 20:26:22 C 13 14 47.15 +41 01 53.1 X C40
2025-07-03 20:28:34 C 13 14 47.18 +41 01 50.5 X C40
2025-07-03 20:30:47 C 13 14 47.23 +41 01 47.8 X C40
2025-07-03 20:33:00 C 13 14 47.29 +41 01 45.1 X C40
2025-07-03 21:35:18 C 13 14 48.840 +41 00 38.12 V R17
2025-07-03 21:55:42 C 13 14 49.207 +41 00 13.64 V R17
2025-07-03 22:16:03 C 13 14 49.577 +40 59 49.24 V R17
2025-07-03 22:42:13 C 13 14 50.057 +40 59 17.63 V R17
2025-07-04 18:16:20 C 13 15 15.99 +40 36 07.0 X C40
2025-07-04 18:18:45 C 13 15 16.04 +40 36 04.3 X C40
2025-07-04 18:21:10 C 13 15 16.09 +40 36 01.4 X C40
2025-07-04 18:23:34 C 13 15 16.13 +40 35 58.5 X C40
2025-07-04 18:25:59 C 13 15 16.17 +40 35 55.4 X C40
2025-07-04 18:28:24 C 13 15 16.24 +40 35 52.6 X C40
2025-07-04 18:30:49 C 13 15 16.27 +40 35 49.8 X C40
2025-07-04 18:33:14 C 13 15 16.32 +40 35 46.8 X C40
2025-07-04 18:35:34 C 13 15 16.38 +40 35 44.2 X C40
2025-07-04 18:37:46 C 13 15 16.40 +40 35 41.4 X C40
2025-07-04 18:39:57 C 13 15 16.44 +40 35 38.7 X C40
2025-07-04 18:42:09 C 13 15 16.49 +40 35 36.3 X C40
2025-07-04 19:48:52 C 13 15 17.80 +40 34 15.8 X D04
2025-07-04 19:53:45 C 13 15 17.96 +40 34 09.9 X D04
2025-07-04 19:58:38 C 13 15 18.07 +40 34 04.5 X D04
2025-07-04 20:03:31 C 13 15 18.20 +40 33 58.2 X D04
2025-07-04 20:08:07 C 13 15 18.29 +40 33 53.0 X D04
2025-07-04 20:12:27 C 13 15 18.41 +40 33 47.6 X D04
2025-07-04 20:16:47 C 13 15 18.44 +40 33 41.8 X D04
2025-07-04 20:21:07 C 13 15 18.49 +40 33 36.8 X D04
2025-07-04 20:25:28 C 13 15 18.65 +40 33 31.4 X D04
2025-07-04 20:29:48 C 13 15 18.75 +40 33 25.8 X D04
2025-07-04 20:34:08 C 13 15 18.72 +40 33 21.6 X D04
2025-07-04 20:38:27 C 13 15 18.94 +40 33 15.9 X D04
2025-07-04 21:13:50 C 13 15 19.879 +40 32 34.98 Z C23
2025-07-04 22:21:49 C 13 15 21.314 +40 31 13.08 Z C23
2025-07-05 18:34:56 C 13 15 48.86 +40 07 19.3 X C40
2025-07-05 18:37:21 C 13 15 48.91 +40 07 16.2 X C40
2025-07-05 18:39:46 C 13 15 48.97 +40 07 13.3 X C40
2025-07-05 18:42:11 C 13 15 49.01 +40 07 10.4 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)