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
2022-05-10 22:18:31 C 11 53 14.57 +60 39 59.9 V C40
2022-05-10 22:19:05 C 11 53 14.58 +60 39 59.2 V C40
2022-05-10 22:19:16 C 11 53 14.59 +60 39 58.9 V C40
2022-05-10 22:19:26 C 11 53 14.59 +60 39 58.7 V C40
2022-05-10 22:20:22 C 11 53 14.62 +60 39 57.5 V C40
2022-05-10 22:21:06 C 11 53 14.66 +60 39 56.4 V C40
2022-05-10 22:21:29 C 11 53 14.67 +60 39 55.9 V C40
2022-05-10 22:22:24 C 11 53 14.70 +60 39 54.7 V C40
2022-05-10 22:23:11 C 11 53 14.72 +60 39 53.5 V C40
2022-05-10 22:23:21 C 11 53 14.73 +60 39 53.3 V C40
2022-05-10 22:23:32 C 11 53 14.72 +60 39 53.1 V C40
2022-05-10 22:23:44 C 11 53 14.73 +60 39 52.9 V C40
2022-05-10 22:23:55 C 11 53 14.74 +60 39 52.5 V C40
2022-05-10 22:24:17 C 11 53 14.75 +60 39 52.1 V C40
2022-05-10 22:24:40 C 11 53 14.77 +60 39 51.5 V C40
2022-05-10 22:25:02 C 11 53 14.78 +60 39 51.1 V C40
2022-05-10 22:25:25 C 11 53 14.79 +60 39 50.5 V C40
2022-05-10 22:25:35 C 11 53 14.79 +60 39 50.3 V C40
2022-05-10 22:25:47 C 11 53 14.81 +60 39 50.0 V C40
2022-05-10 22:25:58 C 11 53 14.81 +60 39 49.7 V C40
2022-05-10 22:26:21 C 11 53 14.82 +60 39 49.2 V C40
2022-05-10 22:26:55 C 11 53 14.83 +60 39 48.4 V C40
2022-05-10 22:27:06 C 11 53 14.85 +60 39 48.2 V C40
2022-05-10 22:27:28 C 11 53 14.85 +60 39 47.7 V C40
2022-05-10 22:27:40 C 11 53 14.86 +60 39 47.5 V C40
2022-05-10 22:30:22 C 11 53 15.45 +60 39 47.9 q M16
2022-05-10 22:37:56 C 11 53 15.17 +60 39 33.5 V C40
2022-05-10 22:38:07 C 11 53 15.19 +60 39 33.1 V C40
2022-05-10 22:38:28 C 11 53 15.19 +60 39 32.7 V C40
2022-05-10 22:39:12 C 11 53 15.21 +60 39 31.7 V C40
2022-05-10 22:39:46 C 11 53 15.24 +60 39 30.9 V C40
2022-05-10 22:40:09 C 11 53 15.25 +60 39 30.4 V C40
2022-05-10 22:40:42 C 11 53 15.26 +60 39 29.7 V C40
2022-05-10 22:41:06 C 11 53 15.29 +60 39 29.1 V C40
2022-05-10 22:41:17 C 11 53 15.28 +60 39 28.8 V C40
2022-05-10 22:42:02 C 11 53 15.32 +60 39 27.8 V C40
2022-05-10 22:42:14 C 11 53 15.33 +60 39 27.5 V C40
2022-05-10 22:42:35 C 11 53 15.33 +60 39 27.0 V C40
2022-05-10 22:43:09 C 11 53 15.36 +60 39 26.3 V C40
2022-05-10 22:43:32 C 11 53 15.37 +60 39 25.7 V C40
2022-05-10 22:43:53 C 11 53 15.38 +60 39 25.2 V C40
2022-05-10 22:44:04 C 11 53 15.39 +60 39 25.0 V C40
2022-05-10 22:44:17 C 11 53 15.38 +60 39 24.8 V C40
2022-05-10 22:46:42 C 11 53 15.45 +60 39 21.5 V C40
2022-05-10 22:47:15 C 11 53 15.48 +60 39 20.6 V C40
2022-05-10 22:47:28 C 11 53 15.48 +60 39 20.4 V C40
2022-05-10 22:48:12 C 11 53 15.51 +60 39 19.4 V C40
2022-05-10 22:48:24 C 11 53 15.52 +60 39 19.1 V C40
2022-05-10 22:48:45 C 11 53 15.52 +60 39 18.7 V C40
2022-05-11 05:55:03 C 11 53 30.764 +60 30 01.94 V 703
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)