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 19:49:08 C 12 15 32.01 +49 33 11.5 V C40
2022-06-02 19:51:56 C 12 15 32.12 +49 33 08.3 V C40
2022-06-02 19:55:25 C 12 15 32.28 +49 33 04.2 V C40
2022-06-02 20:00:44 C 12 15 32.50 +49 32 58.1 V C40
2022-06-02 20:01:48 C 12 15 32.57 +49 32 56.7 V C40
2022-06-03 19:30:31 C 12 16 38.39 +49 06 15.3 V C40
2022-06-03 19:31:14 C 12 16 38.43 +49 06 14.5 V C40
2022-06-03 19:36:09 C 12 16 38.65 +49 06 08.7 V C40
2022-06-03 19:36:31 C 12 16 38.67 +49 06 08.4 V C40
2022-06-03 19:36:52 C 12 16 38.69 +49 06 08.0 V C40
2022-06-03 19:37:35 C 12 16 38.72 +49 06 07.1 V C40
2022-06-03 19:45:33 C 12 16 39.06 +49 05 57.9 V C40
2022-06-03 19:48:02 C 12 16 39.18 +49 05 55.0 V C40
2022-06-03 19:49:48 C 12 16 39.25 +49 05 53.0 V C40
2022-06-03 19:54:46 C 12 16 39.47 +49 05 47.2 V C40
2022-06-03 19:58:40 C 12 16 39.63 +49 05 42.7 V C40
2022-06-03 19:59:44 C 12 16 39.67 +49 05 41.4 V C40
2022-06-03 20:01:51 C 12 16 39.78 +49 05 39.0 V C40
2022-06-03 20:03:35 C 12 16 39.85 +49 05 37.1 V C40
2022-06-03 20:04:18 C 12 16 39.90 +49 05 36.1 V C40
2022-06-03 20:04:39 C 12 16 39.90 +49 05 35.8 V C40
2022-06-03 20:13:26 C 12 16 40.28 +49 05 25.7 V C40
2022-06-03 20:13:49 C 12 16 40.30 +49 05 25.2 V C40
2022-06-03 20:15:35 C 12 16 40.38 +49 05 23.1 V C40
2022-06-03 20:18:46 C 12 16 40.53 +49 05 19.4 V C40
2022-06-03 20:27:15 C 12 16 40.90 +49 05 09.5 V C40
2022-06-03 20:27:36 C 12 16 40.92 +49 05 09.3 V C40
2022-06-03 20:27:56 C 12 16 40.93 +49 05 08.8 V C40
2022-06-03 20:30:04 C 12 16 41.03 +49 05 06.3 V C40
2022-06-03 20:32:21 C 12 16 41.15 +49 05 03.8 V C40
2022-06-04 18:00:59 C 12 17 42.31 +48 40 45.9 V C40
2022-06-04 18:03:29 C 12 17 42.41 +48 40 42.8 V C40
2022-06-04 18:05:15 C 12 17 42.48 +48 40 40.9 V C40
2022-06-04 18:07:43 C 12 17 42.60 +48 40 38.1 V C40
2022-06-04 18:08:46 C 12 17 42.63 +48 40 36.9 V C40
2022-06-04 18:09:50 C 12 17 42.69 +48 40 35.7 V C40
2022-06-04 18:10:10 C 12 17 42.71 +48 40 35.2 V C40
2022-06-04 18:11:36 C 12 17 42.77 +48 40 33.6 V C40
2022-06-04 18:13:00 C 12 17 42.82 +48 40 32.1 V C40
2022-06-04 18:13:20 C 12 17 42.84 +48 40 31.6 V C40
2022-06-04 18:16:51 C 12 17 42.99 +48 40 27.5 V C40
2022-06-04 18:17:13 C 12 17 43.01 +48 40 27.2 V C40
2022-06-04 18:18:38 C 12 17 43.08 +48 40 25.6 V C40
2022-06-04 18:20:02 C 12 17 43.13 +48 40 23.9 V C40
2022-06-04 18:21:05 C 12 17 43.17 +48 40 22.8 V C40
2022-06-04 20:03:59 C 12 17 47.72 +48 38 24.5 V C40
2022-06-04 20:06:49 C 12 17 47.85 +48 38 21.3 V C40
2022-06-04 20:07:09 C 12 17 47.86 +48 38 20.8 V C40
2022-06-04 20:13:10 C 12 17 48.12 +48 38 14.0 V C40
2022-06-04 20:47:55 C 12 17 49.70 +48 37 33.9 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)