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
2022-07-05 19:15:24 C 12 57 02.17 +35 01 28.2 V C40
2022-07-05 19:18:50 C 12 57 02.37 +35 01 24.5 V C40
2022-07-05 20:24:04 C 12 57 06.03 +35 00 12.3 V C40
2022-07-05 21:21:26 C 12 57 09.48 +34 59 10.0 V C23
2022-07-05 21:25:55 C 12 57 09.70 +34 59 05.1 V C23
2022-07-05 23:34:10 C 12 57 16.96 +34 56 42.6 V C23
2022-07-05 23:39:33 C 12 57 17.26 +34 56 36.9 V C23
2022-07-06 06:09:27 C 12 57 39.898 +34 49 40.08 V T05
2022-07-06 06:14:41 C 12 57 40.178 +34 49 34.21 V T05
2022-07-06 06:23:51 C 12 57 40.663 +34 49 23.95 V T05
2022-07-06 06:38:53 C 12 57 41.496 +34 49 07.61 V T05
2022-07-06 06:49:58 C 12 57 42.094 +34 48 55.37 V T05
2022-07-06 06:54:34 C 12 57 42.362 +34 48 50.29 V T05
2022-07-06 07:20:35 C 12 57 43.781 +34 48 21.35 V T05
2022-07-06 18:26:19 C 12 58 22.21 +34 36 09.9 V C40
2022-07-06 18:29:08 C 12 58 22.36 +34 36 06.9 V C40
2022-07-06 18:33:44 C 12 58 22.62 +34 36 01.8 V C40
2022-07-06 18:37:36 C 12 58 22.83 +34 35 57.5 V C40
2022-07-06 18:46:04 C 12 58 23.31 +34 35 48.2 V C40
2022-07-06 18:52:05 C 12 58 23.63 +34 35 41.5 V C40
2022-07-06 18:53:09 C 12 58 23.69 +34 35 40.4 V C40
2022-07-06 18:54:32 C 12 58 23.78 +34 35 38.8 V C40
2022-07-06 19:06:54 C 12 58 24.46 +34 35 25.1 V C40
2022-07-06 19:07:58 C 12 58 24.53 +34 35 23.9 V C40
2022-07-06 19:15:35 C 12 58 24.95 +34 35 15.5 V C40
2022-07-06 19:16:58 C 12 58 25.02 +34 35 14.0 V C40
2022-07-06 19:25:50 C 12 58 25.52 +34 35 04.2 V C40
2022-07-06 19:27:35 C 12 58 25.62 +34 35 02.1 V C40
2022-07-06 19:49:30 C 12 58 26.85 +34 34 37.8 V C40
2022-07-06 20:54:56 C 12 58 30.58 +34 33 25.1 V C40
2022-07-06 20:57:03 C 12 58 30.71 +34 33 22.8 V C40
2022-07-06 21:04:28 C 12 58 31.13 +34 33 14.5 V C40
2022-07-06 21:04:50 C 12 58 31.16 +34 33 14.2 V C40
2022-07-07 06:22:14 C 12 59 03.509 +34 23 13.09 V T08
2022-07-07 06:26:49 C 12 59 03.751 +34 23 08.23 V T08
2022-07-07 06:39:05 C 12 59 04.418 +34 22 54.41 V T08
2022-07-07 18:38:53 C 12 59 45.98 +34 09 42.4 V C40
2022-07-07 18:40:15 C 12 59 46.06 +34 09 40.9 V C40
2022-07-07 18:42:19 C 12 59 46.18 +34 09 38.7 V C40
2022-07-07 18:46:26 C 12 59 46.41 +34 09 34.1 V C40
2022-07-07 18:55:20 C 12 59 46.91 +34 09 24.3 V C40
2022-07-07 19:08:21 C 12 59 47.65 +34 09 09.8 V C40
2022-07-07 19:09:02 C 12 59 47.69 +34 09 09.1 V C40
2022-07-07 19:14:31 C 12 59 48.00 +34 09 03.0 V C40
2022-07-07 19:34:22 C 12 59 49.11 +34 08 40.9 V C40
2022-07-07 19:38:29 C 12 59 49.34 +34 08 36.4 V C40
2022-07-07 19:57:40 C 12 59 50.43 +34 08 15.0 V C40
2022-07-07 19:59:02 C 12 59 50.51 +34 08 13.4 V C40
2022-07-08 07:45:53 C 13 00 31.382 +33 55 26.26 V T08
2022-07-08 07:51:08 C 13 00 31.658 +33 55 20.35 V T08
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)