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
2022-07-13 20:28:12 C 13 08 16.74 +31 29 46.1 V C40
2022-07-13 20:35:17 C 13 08 17.15 +31 29 38.3 V C40
2022-07-13 20:36:19 C 13 08 17.21 +31 29 37.0 V C40
2022-07-13 20:38:49 C 13 08 17.36 +31 29 34.3 V C40
2022-07-13 20:44:07 C 13 08 17.68 +31 29 28.4 V C40
2022-07-13 20:45:10 C 13 08 17.74 +31 29 27.3 V C40
2022-07-13 20:55:45 C 13 08 18.36 +31 29 15.5 V C40
2022-07-13 20:56:06 C 13 08 18.38 +31 29 15.1 V C40
2022-07-14 06:06:33 C 13 08 51.041 +31 19 15.82 V T05
2022-07-14 06:12:25 C 13 08 51.367 +31 19 09.48 V T05
2022-07-14 06:32:45 C 13 08 52.512 +31 18 46.69 V T05
2022-07-14 06:45:11 C 13 08 53.203 +31 18 32.94 V T05
2022-07-14 19:36:44 C 13 09 38.69 +31 04 16.8 V C40
2022-07-14 19:43:34 C 13 09 39.08 +31 04 09.0 V C40
2022-07-14 19:44:56 C 13 09 39.16 +31 04 07.5 V C40
2022-07-14 19:49:03 C 13 09 39.39 +31 04 02.9 V C40
2022-07-14 19:51:06 C 13 09 39.51 +31 04 00.6 V C40
2022-07-14 19:56:34 C 13 09 39.83 +31 03 54.4 V C40
2022-07-14 19:58:39 C 13 09 39.95 +31 03 52.2 V C40
2022-07-14 20:00:42 C 13 09 40.07 +31 03 49.9 V C40
2022-07-14 20:01:22 C 13 09 40.11 +31 03 49.1 V C40
2022-07-14 20:02:44 C 13 09 40.19 +31 03 47.5 V C40
2022-07-14 20:03:26 C 13 09 40.23 +31 03 46.8 V C40
2022-07-14 20:04:48 C 13 09 40.31 +31 03 45.3 V C40
2022-07-14 20:08:13 C 13 09 40.51 +31 03 41.4 V C40
2022-07-14 20:14:23 C 13 09 40.88 +31 03 34.6 V C40
2022-07-14 20:17:07 C 13 09 41.03 +31 03 31.4 V C40
2022-07-14 20:17:49 C 13 09 41.08 +31 03 30.7 V C40
2022-07-14 20:18:29 C 13 09 41.12 +31 03 29.9 V C40
2022-07-14 20:21:54 C 13 09 41.32 +31 03 26.2 V C40
2022-07-14 20:27:28 C 13 09 41.75 +31 03 21.8 X L63
2022-07-14 20:31:42 C 13 09 42.00 +31 03 17.0 X L63
2022-07-14 20:35:57 C 13 09 42.24 +31 03 12.5 X L63
2022-07-14 20:45:11 C 13 09 42.70 +31 03 00.2 V C40
2022-07-14 20:45:18 C 13 09 42.925 +31 03 05.72 X J13
2022-07-14 20:46:06 C 13 09 42.973 +31 03 04.83 X J13
2022-07-14 20:46:55 C 13 09 43.016 +31 03 03.92 X J13
2022-07-14 20:47:44 C 13 09 43.062 +31 03 03.00 X J13
2022-07-14 20:48:32 C 13 09 43.110 +31 03 02.11 X J13
2022-07-14 20:49:21 C 13 09 43.153 +31 03 01.20 X J13
2022-07-14 20:50:10 C 13 09 43.197 +31 03 00.30 X J13
2022-07-14 20:50:58 C 13 09 43.245 +31 02 59.37 X J13
2022-07-14 21:15:47 C 13 09 44.59 +31 02 27.1 V C23
2022-07-14 21:16:51 C 13 09 44.66 +31 02 25.9 V C23
2022-07-14 21:22:14 C 13 09 44.99 +31 02 19.9 V C23
2022-07-15 06:11:48 C 13 10 16.327 +30 52 42.10 V T08
2022-07-15 06:25:56 C 13 10 17.126 +30 52 26.47 V T08
2022-07-15 06:31:11 C 13 10 17.417 +30 52 20.46 V T08
2022-07-15 06:51:02 C 13 10 18.545 +30 51 58.36 V T08
2022-07-15 20:22:42 C 13 11 06.50 +30 36 55.2 V 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)