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
2025-06-17 00:48:24 C 13 10 00.756 +48 51 28.84 V R17
2025-06-17 01:08:14 C 13 10 00.708 +48 51 05.47 V R17
2025-06-17 18:36:14 C 13 10 01.39 +48 31 06.7 X C40
2025-06-17 18:38:39 C 13 10 01.39 +48 31 03.8 X C40
2025-06-17 18:41:04 C 13 10 01.38 +48 31 01.0 X C40
2025-06-17 18:43:28 C 13 10 01.37 +48 30 58.2 X C40
2025-06-17 18:45:53 C 13 10 01.36 +48 30 55.5 X C40
2025-06-17 18:48:17 C 13 10 01.35 +48 30 52.7 X C40
2025-06-17 18:50:42 C 13 10 01.35 +48 30 49.9 X C40
2025-06-17 18:53:06 C 13 10 01.35 +48 30 47.1 X C40
2025-06-17 18:55:24 C 13 10 01.33 +48 30 44.4 X C40
2025-06-17 18:57:36 C 13 10 01.33 +48 30 41.8 X C40
2025-06-17 18:59:49 C 13 10 01.32 +48 30 39.3 X C40
2025-06-17 19:02:02 C 13 10 01.32 +48 30 36.6 X C40
2025-06-17 21:40:19 B 13 10 01.531 +48 27 34.88 q Y84
2025-06-17 21:44:34 B 13 10 01.466 +48 27 29.99 q Y84
2025-06-17 21:48:48 B 13 10 01.483 +48 27 24.55 q Y84
2025-06-18 18:59:29 C 13 10 03.57 +48 03 07.6 X C40
2025-06-18 19:01:54 C 13 10 03.57 +48 03 04.8 X C40
2025-06-18 19:04:18 C 13 10 03.57 +48 03 02.0 X C40
2025-06-18 19:06:42 C 13 10 03.57 +48 02 59.2 X C40
2025-06-18 19:09:07 C 13 10 03.56 +48 02 56.3 X C40
2025-06-18 19:11:32 C 13 10 03.57 +48 02 53.6 X C40
2025-06-18 19:13:56 C 13 10 03.56 +48 02 50.7 X C40
2025-06-18 19:16:21 C 13 10 03.56 +48 02 47.9 X C40
2025-06-18 19:18:40 C 13 10 03.55 +48 02 45.2 X C40
2025-06-18 19:20:53 C 13 10 03.57 +48 02 42.7 X C40
2025-06-18 19:23:05 C 13 10 03.56 +48 02 40.1 X C40
2025-06-18 19:25:18 C 13 10 03.56 +48 02 37.4 X C40
2025-06-18 21:47:42 C 13 10 03.955 +47 59 52.44 Z C23
2025-06-18 22:40:29 C 13 10 03.977 +47 58 51.06 Z C23
2025-06-18 23:52:27 C 13 10 04.056 +47 57 26.42 Z C23
2025-06-19 06:42:21 C 13 10 05.801 +47 49 46.20 V T05
2025-06-19 07:17:29 C 13 10 05.738 +47 49 05.38 V T05
2025-06-19 07:18:08 C 13 10 05.724 +47 49 04.73 V T05
2025-06-19 18:55:03 C 13 10 08.30 +47 35 37.2 X C40
2025-06-19 18:57:28 C 13 10 08.30 +47 35 34.4 X C40
2025-06-19 18:59:53 C 13 10 08.30 +47 35 31.6 X C40
2025-06-19 19:02:18 C 13 10 08.31 +47 35 28.9 X C40
2025-06-19 19:04:42 C 13 10 08.31 +47 35 26.0 X C40
2025-06-19 19:07:07 C 13 10 08.32 +47 35 23.3 X C40
2025-06-19 19:09:32 C 13 10 08.33 +47 35 20.4 X C40
2025-06-19 19:11:57 C 13 10 08.32 +47 35 17.6 X C40
2025-06-19 19:14:15 C 13 10 08.33 +47 35 15.0 X C40
2025-06-19 19:16:27 C 13 10 08.34 +47 35 12.4 X C40
2025-06-19 19:18:40 C 13 10 08.33 +47 35 09.8 X C40
2025-06-19 19:20:53 C 13 10 08.34 +47 35 07.2 X C40
2025-06-19 21:38:58 C 13 10 09.142 +47 32 33.04 V R17
2025-06-19 21:41:44 C 13 10 09.005 +47 32 23.78 Z C23
2025-06-19 21:59:21 C 13 10 09.130 +47 32 09.31 V R17
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)