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
2022-05-14 20:35:19 C 11 56 35.20 +58 37 25.7 V C40
2022-05-14 20:36:23 C 11 56 35.24 +58 37 24.3 V C40
2022-05-14 20:36:44 C 11 56 35.25 +58 37 23.8 V C40
2022-05-14 20:37:06 C 11 56 35.26 +58 37 23.4 V C40
2022-05-14 20:37:47 C 11 56 35.27 +58 37 22.4 V C40
2022-05-14 20:38:09 C 11 56 35.29 +58 37 22.1 V C40
2022-05-14 20:38:30 C 11 56 35.30 +58 37 21.6 V C40
2022-05-14 20:38:51 C 11 56 35.32 +58 37 21.1 V C40
2022-05-14 20:39:13 C 11 56 35.32 +58 37 20.6 V C40
2022-05-14 20:40:37 C 11 56 35.37 +58 37 18.8 V C40
2022-05-14 20:41:19 C 11 56 35.38 +58 37 17.8 V C40
2022-05-14 20:41:40 C 11 56 35.39 +58 37 17.5 V C40
2022-05-14 20:42:01 C 11 56 35.41 +58 37 16.9 V C40
2022-05-14 20:42:23 C 11 56 35.43 +58 37 16.5 V C40
2022-05-14 20:42:44 C 11 56 35.44 +58 37 16.0 V C40
2022-05-14 20:44:30 C 11 56 35.48 +58 37 13.7 V C40
2022-05-14 20:45:34 C 11 56 35.52 +58 37 12.4 V C40
2022-05-14 20:46:15 C 11 56 35.54 +58 37 11.4 V C40
2022-05-14 20:46:37 C 11 56 35.56 +58 37 11.0 V C40
2022-05-14 20:46:58 C 11 56 35.57 +58 37 10.6 V C40
2022-05-14 20:48:02 C 11 56 35.60 +58 37 09.2 V C40
2022-05-14 20:48:22 C 11 56 35.62 +58 37 08.7 V C40
2022-05-14 20:49:26 C 11 56 35.65 +58 37 07.2 V C40
2022-05-14 20:49:48 C 11 56 35.65 +58 37 06.8 V C40
2022-05-14 20:50:09 C 11 56 35.67 +58 37 06.4 V C40
2022-05-14 20:50:30 C 11 56 35.69 +58 37 05.9 V C40
2022-05-14 20:50:52 C 11 56 35.70 +58 37 05.4 V C40
2022-05-14 20:51:13 C 11 56 35.70 +58 37 04.9 V C40
2022-05-14 20:51:35 C 11 56 35.71 +58 37 04.5 V C40
2022-05-14 20:51:56 C 11 56 35.72 +58 37 04.0 V C40
2022-05-14 20:55:13 C 11 56 35.84 +58 36 59.8 V C40
2022-05-14 20:56:59 C 11 56 35.88 +58 36 57.4 V C40
2022-05-14 20:59:06 C 11 56 35.96 +58 36 54.7 V C40
2022-05-14 20:59:28 C 11 56 35.98 +58 36 54.3 V C40
2022-05-14 20:59:48 C 11 56 35.97 +58 36 53.8 V C40
2022-05-14 21:00:31 C 11 56 36.01 +58 36 52.8 V C40
2022-05-14 21:00:52 C 11 56 36.01 +58 36 52.3 V C40
2022-05-14 21:03:42 C 11 56 36.10 +58 36 48.7 V C40
2022-05-14 21:04:25 C 11 56 36.13 +58 36 47.7 V C40
2022-05-14 21:05:06 C 11 56 36.15 +58 36 46.8 V C40
2022-05-14 21:10:03 C 11 56 36.31 +58 36 40.4 V C40
2022-05-14 21:11:30 C 11 56 36.36 +58 36 38.5 V C40
2022-05-14 21:11:51 C 11 56 36.37 +58 36 38.0 V C40
2022-05-14 21:12:33 C 11 56 36.39 +58 36 37.2 V C40
2022-05-14 21:13:37 C 11 56 36.42 +58 36 35.8 V C40
2022-05-14 21:29:17 C 11 56 36.93 +58 36 15.3 V C40
2022-05-14 21:40:57 C 11 56 37.31 +58 36 00.1 V C40
2022-05-14 22:07:49 C 11 56 38.74 +58 35 27.0 V G34
2022-05-14 22:10:25 C 11 56 38.82 +58 35 23.1 V G34
2022-05-14 22:13:01 C 11 56 38.92 +58 35 19.9 V G34
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)