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
2022-06-09 18:58:02 C 12 23 33.32 +46 24 58.6 V C40
2022-06-09 18:59:48 C 12 23 33.40 +46 24 56.6 V C40
2022-06-09 19:00:08 C 12 23 33.43 +46 24 56.3 V C40
2022-06-09 19:00:29 C 12 23 33.45 +46 24 55.8 V C40
2022-06-09 19:01:12 C 12 23 33.48 +46 24 55.1 V C40
2022-06-09 19:02:58 C 12 23 33.56 +46 24 53.1 V C40
2022-06-09 19:03:19 C 12 23 33.57 +46 24 52.7 V C40
2022-06-09 19:05:46 C 12 23 33.69 +46 24 49.9 V C40
2022-06-09 19:07:11 C 12 23 33.76 +46 24 48.2 V C40
2022-06-09 19:07:32 C 12 23 33.76 +46 24 47.8 V C40
2022-06-09 19:15:55 C 12 23 34.16 +46 24 38.4 V C40
2022-06-09 19:16:16 C 12 23 34.17 +46 24 37.9 V C40
2022-06-09 19:16:38 C 12 23 34.19 +46 24 37.6 V C40
2022-06-09 19:17:19 C 12 23 34.22 +46 24 36.8 V C40
2022-06-09 19:21:55 C 12 23 34.43 +46 24 31.6 V C40
2022-06-09 19:24:42 C 12 23 34.57 +46 24 28.5 V C40
2022-06-09 19:27:32 C 12 23 34.69 +46 24 25.2 V C40
2022-06-09 19:30:00 C 12 23 34.82 +46 24 22.5 V C40
2022-06-09 19:30:42 C 12 23 34.84 +46 24 21.7 V C40
2022-06-09 19:34:13 C 12 23 35.01 +46 24 17.7 V C40
2022-06-09 19:40:16 C 12 23 35.30 +46 24 10.8 V C40
2022-06-09 19:43:05 C 12 23 35.43 +46 24 07.6 V C40
2022-06-09 19:43:26 C 12 23 35.43 +46 24 07.5 V C40
2022-06-09 19:43:46 C 12 23 35.46 +46 24 06.8 V C40
2022-06-09 19:44:30 C 12 23 35.48 +46 24 06.1 V C40
2022-06-09 19:45:12 C 12 23 35.52 +46 24 05.2 V C40
2022-06-09 19:45:33 C 12 23 35.53 +46 24 04.8 V C40
2022-06-09 19:47:17 C 12 23 35.62 +46 24 02.8 V C40
2022-06-09 19:47:40 C 12 23 35.64 +46 24 02.5 V C40
2022-06-09 19:49:03 C 12 23 35.71 +46 24 00.8 V C40
2022-06-11 18:13:37 C 12 25 54.57 +45 32 27.6 V C40
2022-06-11 18:13:48 C 12 25 54.60 +45 32 27.5 V C40
2022-06-11 18:13:59 C 12 25 54.60 +45 32 27.3 V C40
2022-06-11 18:16:04 C 12 25 54.69 +45 32 25.0 V C40
2022-06-11 18:20:59 C 12 25 54.93 +45 32 19.5 V C40
2022-06-11 18:26:58 C 12 25 55.21 +45 32 12.7 V C40
2022-06-11 18:46:42 C 12 25 56.14 +45 31 50.5 V C40
2022-06-11 18:52:42 C 12 25 56.43 +45 31 43.9 V C40
2022-06-11 18:53:02 C 12 25 56.44 +45 31 43.5 V C40
2022-06-11 18:53:23 C 12 25 56.46 +45 31 43.1 V C40
2022-06-11 18:53:45 C 12 25 56.47 +45 31 42.7 V C40
2022-06-11 18:55:30 C 12 25 56.56 +45 31 40.6 V C40
2022-06-11 18:58:20 C 12 25 56.69 +45 31 37.4 V C40
2022-06-11 18:58:40 C 12 25 56.70 +45 31 37.1 V C40
2022-06-11 19:03:36 C 12 25 56.95 +45 31 31.6 V C40
2022-06-11 19:03:57 C 12 25 56.96 +45 31 31.2 V C40
2022-06-11 19:04:17 C 12 25 56.97 +45 31 30.8 V C40
2022-06-11 19:28:03 C 12 25 58.09 +45 31 04.1 V C40
2022-06-11 19:28:45 C 12 25 58.13 +45 31 03.2 V C40
2022-06-11 19:31:12 C 12 25 58.25 +45 31 00.4 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)