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
2022-06-02 18:49:29 C 12 15 29.42 +49 34 20.6 V C40
2022-06-02 18:50:55 C 12 15 29.48 +49 34 18.9 V C40
2022-06-02 18:51:15 C 12 15 29.49 +49 34 18.5 V C40
2022-06-02 18:51:38 C 12 15 29.51 +49 34 18.0 V C40
2022-06-02 18:51:59 C 12 15 29.53 +49 34 17.7 V C40
2022-06-02 18:52:41 C 12 15 29.56 +49 34 16.8 V C40
2022-06-02 18:53:02 C 12 15 29.57 +49 34 16.4 V C40
2022-06-02 18:54:49 C 12 15 29.65 +49 34 14.3 V C40
2022-06-02 18:55:53 C 12 15 29.70 +49 34 13.2 V C40
2022-06-02 18:57:16 C 12 15 29.76 +49 34 11.6 V C40
2022-06-02 18:57:59 C 12 15 29.79 +49 34 10.7 V C40
2022-06-02 18:58:20 C 12 15 29.81 +49 34 10.3 V C40
2022-06-02 19:00:07 C 12 15 29.89 +49 34 08.3 V C40
2022-06-02 19:00:27 C 12 15 29.89 +49 34 07.8 V C40
2022-06-02 19:00:48 C 12 15 29.91 +49 34 07.4 V C40
2022-06-02 19:01:10 C 12 15 29.93 +49 34 07.0 V C40
2022-06-02 19:01:51 C 12 15 29.95 +49 34 06.3 V C40
2022-06-02 19:04:21 C 12 15 30.06 +49 34 03.4 V C40
2022-06-02 19:04:41 C 12 15 30.08 +49 34 03.0 V C40
2022-06-02 19:05:02 C 12 15 30.09 +49 34 02.5 V C40
2022-06-02 19:05:45 C 12 15 30.12 +49 34 01.7 V C40
2022-06-02 19:07:48 C 12 15 30.21 +49 33 59.4 V C40
2022-06-02 19:08:10 C 12 15 30.22 +49 33 58.9 V C40
2022-06-02 19:09:34 C 12 15 30.29 +49 33 57.3 V C40
2022-06-02 19:13:47 C 12 15 30.48 +49 33 52.4 V C40
2022-06-02 19:14:08 C 12 15 30.49 +49 33 52.0 V C40
2022-06-02 19:15:35 C 12 15 30.55 +49 33 50.4 V C40
2022-06-02 19:16:38 C 12 15 30.59 +49 33 49.2 V C40
2022-06-02 19:17:21 C 12 15 30.63 +49 33 48.3 V C40
2022-06-02 19:17:42 C 12 15 30.64 +49 33 47.9 V C40
2022-06-02 19:18:25 C 12 15 30.67 +49 33 47.1 V C40
2022-06-02 19:19:29 C 12 15 30.72 +49 33 45.9 V C40
2022-06-02 19:19:50 C 12 15 30.73 +49 33 45.5 V C40
2022-06-02 19:20:10 C 12 15 30.75 +49 33 45.1 V C40
2022-06-02 19:21:13 C 12 15 30.80 +49 33 43.9 V C40
2022-06-02 19:24:04 C 12 15 30.92 +49 33 40.6 V C40
2022-06-02 19:24:24 C 12 15 30.92 +49 33 40.1 V C40
2022-06-02 19:24:47 C 12 15 30.95 +49 33 39.7 V C40
2022-06-02 19:25:07 C 12 15 30.96 +49 33 39.3 V C40
2022-06-02 19:26:54 C 12 15 31.03 +49 33 37.2 V C40
2022-06-02 19:27:14 C 12 15 31.06 +49 33 36.9 V C40
2022-06-02 19:27:36 C 12 15 31.06 +49 33 36.4 V C40
2022-06-02 19:27:58 C 12 15 31.09 +49 33 36.0 V C40
2022-06-02 19:35:19 C 12 15 31.40 +49 33 27.5 V C40
2022-06-02 19:36:02 C 12 15 31.43 +49 33 26.7 V C40
2022-06-02 19:40:39 C 12 15 31.64 +49 33 21.4 V C40
2022-06-02 19:42:46 C 12 15 31.73 +49 33 18.9 V C40
2022-06-02 19:47:01 C 12 15 31.91 +49 33 13.9 V C40
2022-06-02 19:47:21 C 12 15 31.93 +49 33 13.5 V C40
2022-06-02 19:47:42 C 12 15 31.94 +49 33 13.1 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)