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
2022-05-25 21:16:43 C 12 07 03.09 +53 13 51.6 V C40
2022-05-25 21:17:46 C 12 07 03.15 +53 13 50.4 V C40
2022-05-25 21:18:50 C 12 07 03.19 +53 13 49.1 V C40
2022-05-25 21:20:13 C 12 07 03.24 +53 13 47.3 V C40
2022-05-25 21:20:34 C 12 07 03.25 +53 13 46.9 V C40
2022-05-25 21:20:56 C 12 07 03.27 +53 13 46.6 V C40
2022-05-25 21:22:20 C 12 07 03.32 +53 13 44.8 V C40
2022-05-25 21:23:03 C 12 07 03.35 +53 13 44.0 V C40
2022-05-25 21:23:23 C 12 07 03.37 +53 13 43.5 V C40
2022-05-25 21:24:27 C 12 07 03.41 +53 13 42.2 V C40
2022-05-25 21:29:59 C 12 07 03.64 +53 13 35.5 V C40
2022-05-25 21:31:45 C 12 07 03.70 +53 13 33.4 V C40
2022-05-25 21:32:05 C 12 07 03.72 +53 13 33.1 V C40
2022-05-25 21:32:26 C 12 07 03.74 +53 13 32.6 V C40
2022-05-25 21:32:48 C 12 07 03.74 +53 13 32.1 V C40
2022-05-25 21:33:09 C 12 07 03.76 +53 13 31.8 V C40
2022-05-25 21:34:55 C 12 07 03.82 +53 13 29.6 V C40
2022-05-25 21:35:15 C 12 07 03.84 +53 13 29.0 V C40
2022-05-27 20:57:36 C 12 09 06.10 +52 17 53.5 V C40
2022-05-27 20:58:11 C 12 09 06.13 +52 17 53.0 V C40
2022-05-27 20:59:17 C 12 09 06.18 +52 17 51.6 V C40
2022-05-27 21:00:00 C 12 09 06.21 +52 17 50.8 V C40
2022-05-27 21:01:03 C 12 09 06.25 +52 17 49.6 V C40
2022-05-27 21:05:37 C 12 09 06.44 +52 17 44.1 V C40
2022-05-27 21:06:20 C 12 09 06.47 +52 17 43.3 V C40
2022-05-27 21:06:40 C 12 09 06.49 +52 17 42.8 V C40
2022-05-27 21:07:01 C 12 09 06.50 +52 17 42.4 V C40
2022-05-27 21:07:23 C 12 09 06.51 +52 17 42.0 V C40
2022-05-27 21:08:27 C 12 09 06.56 +52 17 40.6 V C40
2022-05-27 21:09:50 C 12 09 06.62 +52 17 39.0 V C40
2022-05-27 21:10:11 C 12 09 06.63 +52 17 38.6 V C40
2022-05-27 21:10:33 C 12 09 06.64 +52 17 38.1 V C40
2022-05-27 21:12:40 C 12 09 06.73 +52 17 35.7 V C40
2022-05-27 21:14:04 C 12 09 06.79 +52 17 33.9 V C40
2022-05-27 21:18:38 C 12 09 06.98 +52 17 28.6 V C40
2022-05-27 21:21:31 C 12 09 07.10 +52 17 25.1 V C40
2022-05-27 21:22:34 C 12 09 07.14 +52 17 23.7 V C40
2022-05-27 21:24:40 C 12 09 07.23 +52 17 21.3 V C40
2022-05-27 21:25:03 C 12 09 07.24 +52 17 20.9 V C40
2022-05-27 21:25:24 C 12 09 07.26 +52 17 20.5 V C40
2022-05-27 21:25:44 C 12 09 07.27 +52 17 20.1 V C40
2022-05-27 21:27:30 C 12 09 07.34 +52 17 17.8 V C40
2022-05-27 21:27:50 C 12 09 07.37 +52 17 17.4 V C40
2022-05-27 21:28:12 C 12 09 07.38 +52 17 17.1 V C40
2022-05-27 21:28:34 C 12 09 07.38 +52 17 16.6 V C40
2022-05-27 21:28:54 C 12 09 07.41 +52 17 16.3 V C40
2022-05-27 21:29:15 C 12 09 07.42 +52 17 15.7 V C40
2022-05-27 21:31:44 C 12 09 07.52 +52 17 12.9 V C40
2022-05-27 21:32:47 C 12 09 07.57 +52 17 11.5 V C40
2022-05-27 21:33:08 C 12 09 07.58 +52 17 11.1 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)