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
2022-08-08 17:54:22 C 13 45 34.00 +19 38 07.7 V C40
2022-08-08 18:07:23 C 13 45 34.75 +19 37 51.8 V C40
2022-08-08 18:08:46 C 13 45 34.83 +19 37 50.0 V C40
2022-08-08 18:09:26 C 13 45 34.87 +19 37 49.2 V C40
2022-08-08 18:10:08 C 13 45 34.91 +19 37 48.4 V C40
2022-08-08 18:18:20 C 13 45 35.38 +19 37 38.4 V C40
2022-08-08 18:22:27 C 13 45 35.62 +19 37 33.3 V C40
2022-08-08 19:03:51 C 13 45 38.06 +19 36 43.2 V C40
2022-08-08 19:05:56 C 13 45 38.18 +19 36 40.6 V C40
2022-08-08 20:33:10 C 13 45 43.46 +19 34 55.3 V C23
2022-08-08 20:38:34 C 13 45 43.81 +19 34 47.7 V C23
2022-08-08 20:42:52 C 13 45 44.03 +19 34 42.6 V C23
2022-08-08 20:50:48 C 13 45 44.491 +19 34 32.48 X K87
2022-08-08 20:52:55 C 13 45 44.585 +19 34 30.14 X K87
2022-08-08 20:55:01 C 13 45 44.702 +19 34 27.70 X K87
2022-08-09 07:07:26 C 13 46 20.942 +19 22 09.80 V T08
2022-08-09 07:12:06 C 13 46 21.216 +19 22 03.97 V T08
2022-08-09 07:53:39 C 13 46 23.618 +19 21 12.82 V T08
2022-08-09 07:58:17 C 13 46 23.892 +19 21 07.38 V T08
2022-08-09 18:44:57 C 13 47 02.46 +19 07 56.1 V C40
2022-08-09 18:56:36 C 13 47 03.11 +19 07 42.0 V C40
2022-08-09 19:08:55 C 13 47 03.79 +19 07 26.9 V C40
2022-08-09 19:12:20 C 13 47 03.98 +19 07 22.8 V C40
2022-08-13 20:31:21 C 13 52 45.96 +17 07 10.9 V C23
2022-08-13 20:33:31 C 13 52 46.15 +17 07 07.9 V C23
2022-08-13 20:46:39 C 13 52 46.85 +17 06 51.7 V C23
2022-08-14 05:59:54 C 13 53 18.775 +16 55 23.70 V T05
2022-08-14 06:09:08 C 13 53 19.286 +16 55 12.07 V T05
2022-08-14 06:15:43 C 13 53 19.661 +16 55 03.72 V T05
2022-08-14 06:32:03 C 13 53 20.561 +16 54 43.16 V T05
2022-08-14 18:03:40 C 13 54 00.44 +16 40 08.3 V C40
2022-08-14 18:13:57 C 13 54 01.03 +16 39 55.2 V C40
2022-08-14 19:16:18 C 13 54 04.62 +16 38 35.9 V C40
2022-08-15 17:23:24 C 13 55 20.54 +16 10 37.2 V C40
2022-08-15 17:35:45 C 13 55 21.22 +16 10 21.5 V C40
2022-08-15 18:27:49 C 13 55 24.17 +16 09 15.3 V C40
2022-08-15 23:28:47 C 13 55 41.366 +16 03 05.94 V W68
2022-08-15 23:43:46 C 13 55 42.192 +16 02 46.54 V W68
2022-08-15 23:54:12 C 13 55 42.758 +16 02 33.25 V W68
2022-08-16 00:03:19 C 13 55 43.262 +16 02 21.88 V W68
2022-08-19 06:05:31 C 14 00 04.807 +14 21 30.49 V T05
2022-08-19 06:13:26 C 14 00 05.242 +14 21 20.12 V T05
2022-08-19 06:17:26 C 14 00 05.448 +14 21 14.80 V T05
2022-08-19 06:31:52 C 14 00 06.211 +14 20 55.68 V T05
2022-08-19 17:26:23 C 14 00 42.16 +14 06 33.7 V C40
2022-08-19 17:36:38 C 14 00 42.71 +14 06 20.1 V C40
2022-08-19 17:56:30 C 14 00 43.77 +14 05 53.7 V C40
2022-08-19 18:06:36 C 14 00 44.31 +14 05 40.4 V C40
2022-08-19 18:50:26 C 14 00 46.69 +14 04 42.7 V C40
2022-08-21 06:01:13 C 14 02 40.500 +13 18 12.78 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)