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
2022-06-07 18:58:26 C 12 21 12.15 +47 18 36.3 V C40
2022-06-07 18:59:07 C 12 21 12.18 +47 18 35.4 V C40
2022-06-07 18:59:49 C 12 21 12.21 +47 18 34.6 V C40
2022-06-07 19:00:29 C 12 21 12.23 +47 18 33.9 V C40
2022-06-07 19:01:11 C 12 21 12.27 +47 18 33.1 V C40
2022-06-07 19:35:38 C 12 21 13.85 +47 17 53.9 V C40
2022-06-07 19:36:20 C 12 21 13.88 +47 17 53.1 V C40
2022-06-07 19:37:00 C 12 21 13.91 +47 17 52.4 V C40
2022-06-07 19:48:39 C 12 21 14.44 +47 17 39.1 V C40
2022-06-07 19:50:01 C 12 21 14.51 +47 17 37.5 V C40
2022-06-07 19:50:43 C 12 21 14.53 +47 17 36.7 V C40
2022-06-07 19:52:45 C 12 21 14.63 +47 17 34.4 V C40
2022-06-07 19:54:08 C 12 21 14.69 +47 17 32.9 V C40
2022-06-07 20:10:13 C 12 21 15.43 +47 17 14.6 V C40
2022-06-08 05:12:35 C 12 21 41.915 +47 07 10.45 V 703
2022-06-08 05:20:22 C 12 21 42.268 +47 07 01.56 V 703
2022-06-08 05:28:09 C 12 21 42.624 +47 06 52.67 V 703
2022-06-08 05:35:55 C 12 21 42.980 +47 06 43.81 V 703
2022-06-09 18:13:38 C 12 23 31.28 +46 25 48.6 V C40
2022-06-09 18:14:18 C 12 23 31.30 +46 25 48.0 V C40
2022-06-09 18:16:22 C 12 23 31.39 +46 25 45.7 V C40
2022-06-09 18:18:25 C 12 23 31.50 +46 25 43.4 V C40
2022-06-09 18:19:07 C 12 23 31.52 +46 25 42.5 V C40
2022-06-09 18:19:47 C 12 23 31.55 +46 25 41.8 V C40
2022-06-09 18:21:10 C 12 23 31.62 +46 25 40.2 V C40
2022-06-09 18:22:32 C 12 23 31.69 +46 25 38.7 V C40
2022-06-09 18:26:09 C 12 23 31.85 +46 25 34.7 V C40
2022-06-09 18:27:33 C 12 23 31.92 +46 25 33.1 V C40
2022-06-09 18:27:55 C 12 23 31.93 +46 25 32.6 V C40
2022-06-09 18:28:16 C 12 23 31.94 +46 25 32.3 V C40
2022-06-09 18:29:19 C 12 23 32.00 +46 25 31.0 V C40
2022-06-09 18:33:33 C 12 23 32.19 +46 25 26.2 V C40
2022-06-09 18:35:39 C 12 23 32.29 +46 25 23.9 V C40
2022-06-09 18:36:00 C 12 23 32.31 +46 25 23.6 V C40
2022-06-09 18:36:20 C 12 23 32.32 +46 25 23.2 V C40
2022-06-09 18:40:13 C 12 23 32.50 +46 25 18.8 V C40
2022-06-09 18:40:56 C 12 23 32.53 +46 25 17.9 V C40
2022-06-09 18:41:37 C 12 23 32.57 +46 25 17.2 V C40
2022-06-09 18:41:59 C 12 23 32.58 +46 25 16.8 V C40
2022-06-09 18:42:40 C 12 23 32.61 +46 25 16.0 V C40
2022-06-09 18:43:24 C 12 23 32.65 +46 25 15.1 V C40
2022-06-09 18:45:50 C 12 23 32.76 +46 25 12.4 V C40
2022-06-09 18:46:11 C 12 23 32.77 +46 25 12.0 V C40
2022-06-09 18:46:33 C 12 23 32.80 +46 25 11.7 V C40
2022-06-09 18:47:51 C 12 23 32.86 +46 25 10.1 V C40
2022-06-09 18:50:40 C 12 23 32.98 +46 25 06.9 V C40
2022-06-09 18:53:07 C 12 23 33.09 +46 25 04.2 V C40
2022-06-09 18:55:35 C 12 23 33.21 +46 25 01.4 V C40
2022-06-09 18:56:17 C 12 23 33.25 +46 25 00.6 V C40
2022-06-09 18:57:19 C 12 23 33.30 +46 24 59.4 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)