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
2022-06-04 22:21:58 C 12 17 54.18 +48 35 48.2 V L63
2022-06-04 22:25:08 C 12 17 54.33 +48 35 44.8 V L63
2022-06-04 22:28:18 C 12 17 54.49 +48 35 41.1 V L63
2022-06-05 05:40:50 C 12 18 15.037 +48 27 35.35 V 703
2022-06-05 05:48:28 C 12 18 15.390 +48 27 26.42 V 703
2022-06-05 05:56:07 C 12 18 15.718 +48 27 17.89 V 703
2022-06-05 06:03:45 C 12 18 16.088 +48 27 08.96 V 703
2022-06-06 18:03:56 C 12 19 59.98 +47 46 34.2 V C40
2022-06-06 18:04:18 C 12 19 59.97 +47 46 33.9 V C40
2022-06-06 18:06:46 C 12 20 00.09 +47 46 30.9 V C40
2022-06-06 18:08:33 C 12 20 00.17 +47 46 28.9 V C40
2022-06-06 18:08:54 C 12 20 00.18 +47 46 28.5 V C40
2022-06-06 18:09:37 C 12 20 00.22 +47 46 27.8 V C40
2022-06-06 18:09:58 C 12 20 00.23 +47 46 27.3 V C40
2022-06-06 18:10:20 C 12 20 00.25 +47 46 26.9 V C40
2022-06-06 18:11:01 C 12 20 00.27 +47 46 26.2 V C40
2022-06-06 18:12:05 C 12 20 00.32 +47 46 24.9 V C40
2022-06-06 18:12:48 C 12 20 00.36 +47 46 24.1 V C40
2022-06-06 18:14:12 C 12 20 00.42 +47 46 22.5 V C40
2022-06-06 18:15:59 C 12 20 00.50 +47 46 20.5 V C40
2022-06-06 18:17:02 C 12 20 00.55 +47 46 19.4 V C40
2022-06-06 18:17:23 C 12 20 00.56 +47 46 18.9 V C40
2022-06-06 18:19:09 C 12 20 00.64 +47 46 17.0 V C40
2022-06-06 18:19:29 C 12 20 00.66 +47 46 16.5 V C40
2022-06-06 18:19:50 C 12 20 00.68 +47 46 16.2 V C40
2022-06-06 18:20:13 C 12 20 00.69 +47 46 15.8 V C40
2022-06-06 18:21:37 C 12 20 00.75 +47 46 14.2 V C40
2022-06-06 18:34:26 C 12 20 01.33 +47 45 59.5 V C40
2022-06-06 18:37:16 C 12 20 01.45 +47 45 56.4 V C40
2022-06-06 18:38:19 C 12 20 01.51 +47 45 55.1 V C40
2022-06-06 18:40:06 C 12 20 01.59 +47 45 53.1 V C40
2022-06-06 18:40:47 C 12 20 01.62 +47 45 52.3 V C40
2022-06-06 18:43:37 C 12 20 01.74 +47 45 49.1 V C40
2022-06-06 18:45:01 C 12 20 01.81 +47 45 47.5 V C40
2022-06-06 18:48:33 C 12 20 01.96 +47 45 43.5 V C40
2022-06-06 18:49:14 C 12 20 01.99 +47 45 42.7 V C40
2022-06-06 18:49:35 C 12 20 02.01 +47 45 42.3 V C40
2022-06-06 18:53:29 C 12 20 02.19 +47 45 37.9 V C40
2022-06-06 18:55:52 C 12 20 02.29 +47 45 35.1 V C40
2022-06-06 18:56:13 C 12 20 02.31 +47 45 34.7 V C40
2022-06-06 18:56:34 C 12 20 02.33 +47 45 34.3 V C40
2022-06-06 18:58:00 C 12 20 02.39 +47 45 32.8 V C40
2022-06-06 18:58:20 C 12 20 02.40 +47 45 32.4 V C40
2022-06-06 19:00:07 C 12 20 02.49 +47 45 30.3 V C40
2022-06-06 19:03:18 C 12 20 02.63 +47 45 26.7 V C40
2022-06-06 19:04:43 C 12 20 02.69 +47 45 25.1 V C40
2022-06-06 19:05:05 C 12 20 02.71 +47 45 24.7 V C40
2022-06-06 19:05:26 C 12 20 02.73 +47 45 24.3 V C40
2022-06-06 19:07:12 C 12 20 02.81 +47 45 22.2 V C40
2022-06-06 19:07:33 C 12 20 02.83 +47 45 21.9 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)