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
2022-06-01 20:13:45 C 12 14 26.53 +50 00 06.6 V C40
2022-06-01 20:14:07 C 12 14 26.54 +50 00 06.2 V C40
2022-06-01 20:14:48 C 12 14 26.57 +50 00 05.4 V C40
2022-06-01 20:16:35 C 12 14 26.64 +50 00 03.4 V C40
2022-06-01 20:16:56 C 12 14 26.67 +50 00 02.9 V C40
2022-06-01 20:17:18 C 12 14 26.67 +50 00 02.5 V C40
2022-06-01 20:17:38 C 12 14 26.70 +50 00 02.1 V C40
2022-06-01 20:20:49 C 12 14 26.83 +49 59 58.5 V C40
2022-06-01 20:21:10 C 12 14 26.84 +49 59 58.0 V C40
2022-06-01 20:24:20 C 12 14 26.99 +49 59 54.4 V C40
2022-06-01 20:25:03 C 12 14 27.02 +49 59 53.5 V C40
2022-06-01 20:27:53 C 12 14 27.14 +49 59 50.2 V C40
2022-06-01 20:28:34 C 12 14 27.17 +49 59 49.5 V C40
2022-06-01 20:29:17 C 12 14 27.22 +49 59 48.6 V C40
2022-06-02 03:35:17 C 12 14 47.375 +49 51 47.02 V G96
2022-06-02 03:43:42 C 12 14 47.724 +49 51 37.33 V G96
2022-06-02 03:52:06 C 12 14 48.070 +49 51 27.61 V G96
2022-06-02 04:00:29 C 12 14 48.419 +49 51 17.96 V G96
2022-06-02 18:21:29 C 12 15 28.22 +49 34 52.8 V C40
2022-06-02 18:23:56 C 12 15 28.33 +49 34 50.0 V C40
2022-06-02 18:24:59 C 12 15 28.38 +49 34 48.8 V C40
2022-06-02 18:25:22 C 12 15 28.38 +49 34 48.4 V C40
2022-06-02 18:26:03 C 12 15 28.42 +49 34 47.5 V C40
2022-06-02 18:26:24 C 12 15 28.43 +49 34 47.1 V C40
2022-06-02 18:26:46 C 12 15 28.45 +49 34 46.8 V C40
2022-06-02 18:27:06 C 12 15 28.47 +49 34 46.3 V C40
2022-06-02 18:27:27 C 12 15 28.48 +49 34 46.0 V C40
2022-06-02 18:27:50 C 12 15 28.50 +49 34 45.5 V C40
2022-06-02 18:28:31 C 12 15 28.52 +49 34 44.7 V C40
2022-06-02 18:31:00 C 12 15 28.63 +49 34 41.9 V C40
2022-06-02 18:32:04 C 12 15 28.68 +49 34 40.6 V C40
2022-06-02 18:32:47 C 12 15 28.70 +49 34 39.8 V C40
2022-06-02 18:33:08 C 12 15 28.72 +49 34 39.5 V C40
2022-06-02 18:33:28 C 12 15 28.73 +49 34 39.1 V C40
2022-06-02 18:35:15 C 12 15 28.81 +49 34 36.9 V C40
2022-06-02 18:36:18 C 12 15 28.85 +49 34 35.7 V C40
2022-06-02 18:37:01 C 12 15 28.89 +49 34 35.0 V C40
2022-06-02 18:37:43 C 12 15 28.92 +49 34 34.1 V C40
2022-06-02 18:39:08 C 12 15 28.97 +49 34 32.5 V C40
2022-06-02 18:39:29 C 12 15 29.00 +49 34 32.1 V C40
2022-06-02 18:39:49 C 12 15 29.01 +49 34 31.6 V C40
2022-06-02 18:40:11 C 12 15 29.03 +49 34 31.3 V C40
2022-06-02 18:40:33 C 12 15 29.04 +49 34 30.8 V C40
2022-06-02 18:40:53 C 12 15 29.06 +49 34 30.4 V C40
2022-06-02 18:41:56 C 12 15 29.10 +49 34 29.2 V C40
2022-06-02 18:42:19 C 12 15 29.12 +49 34 28.8 V C40
2022-06-02 18:46:41 C 12 15 29.30 +49 34 23.8 V C40
2022-06-02 18:47:01 C 12 15 29.32 +49 34 23.4 V C40
2022-06-02 18:47:23 C 12 15 29.33 +49 34 23.0 V C40
2022-06-02 18:47:44 C 12 15 29.34 +49 34 22.6 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)