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
2022-07-10 07:26:12 C 13 03 17.678 +33 03 15.19 V T05
2022-07-10 07:43:13 C 13 03 18.638 +33 02 56.29 V T05
2022-07-10 20:39:39 C 13 04 04.04 +32 48 41.2 X L63
2022-07-10 20:41:19 C 13 04 04.18 +32 48 40.0 X L63
2022-07-10 20:42:59 C 13 04 04.24 +32 48 37.6 X L63
2022-07-11 07:04:58 C 13 04 40.589 +32 37 19.99 V T08
2022-07-11 07:05:37 C 13 04 40.601 +32 37 19.52 V T08
2022-07-11 07:10:13 C 13 04 40.877 +32 37 14.48 V T08
2022-07-11 07:11:32 C 13 04 40.937 +32 37 13.15 V T08
2022-07-11 07:19:25 C 13 04 41.405 +32 37 04.22 V T08
2022-07-11 07:22:42 C 13 04 41.554 +32 37 00.44 V T08
2022-07-11 07:39:54 C 13 04 42.554 +32 36 41.29 V T08
2022-07-11 07:42:32 C 13 04 42.708 +32 36 38.20 V T08
2022-07-11 18:31:20 C 13 05 20.83 +32 24 42.4 V C40
2022-07-11 18:32:00 C 13 05 20.87 +32 24 41.7 V C40
2022-07-11 18:34:45 C 13 05 21.02 +32 24 38.6 V C40
2022-07-11 18:38:11 C 13 05 21.22 +32 24 34.8 V C40
2022-07-11 18:45:01 C 13 05 21.61 +32 24 27.3 V C40
2022-07-11 18:51:12 C 13 05 21.96 +32 24 20.4 V C40
2022-07-11 19:00:46 C 13 05 22.51 +32 24 09.7 V C40
2022-07-11 19:08:18 C 13 05 22.93 +32 24 01.3 V C40
2022-07-11 19:09:00 C 13 05 22.97 +32 24 00.6 V C40
2022-07-11 19:09:41 C 13 05 23.02 +32 23 59.8 V C40
2022-07-11 19:15:10 C 13 05 23.33 +32 23 53.7 V C40
2022-07-11 19:15:50 C 13 05 23.37 +32 23 53.0 V C40
2022-07-11 19:16:32 C 13 05 23.41 +32 23 52.2 V C40
2022-07-11 19:35:25 C 13 05 24.49 +32 23 31.3 V C40
2022-07-11 19:47:04 C 13 05 25.16 +32 23 18.3 V C40
2022-07-11 19:49:48 C 13 05 25.32 +32 23 15.2 V C40
2022-07-11 20:07:37 C 13 05 26.34 +32 22 55.5 V C40
2022-07-11 20:21:50 C 13 05 27.29 +32 22 41.6 X L63
2022-07-11 20:28:44 C 13 05 27.69 +32 22 34.0 X L63
2022-07-11 20:35:06 C 13 05 28.05 +32 22 26.6 X L63
2022-07-12 06:14:25 C 13 06 02.093 +32 11 55.57 V T08
2022-07-12 06:19:00 C 13 06 02.345 +32 11 50.39 V T08
2022-07-12 06:28:59 C 13 06 02.899 +32 11 39.26 V T08
2022-07-12 06:46:12 C 13 06 03.862 +32 11 20.18 V T08
2022-07-13 19:19:37 C 13 08 12.77 +31 31 02.8 V C40
2022-07-13 19:20:19 C 13 08 12.80 +31 31 02.0 V C40
2022-07-13 19:21:01 C 13 08 12.84 +31 31 01.2 V C40
2022-07-13 19:25:14 C 13 08 13.08 +31 30 56.5 V C40
2022-07-13 19:35:29 C 13 08 13.67 +31 30 45.0 V C40
2022-07-13 19:37:14 C 13 08 13.77 +31 30 43.1 V C40
2022-07-13 19:37:37 C 13 08 13.80 +31 30 42.6 V C40
2022-07-13 19:37:57 C 13 08 13.82 +31 30 42.2 V C40
2022-07-13 19:41:51 C 13 08 14.04 +31 30 37.9 V C40
2022-07-13 19:45:02 C 13 08 14.23 +31 30 34.4 V C40
2022-07-13 19:45:22 C 13 08 14.25 +31 30 33.9 V C40
2022-07-13 19:46:05 C 13 08 14.29 +31 30 33.2 V C40
2022-07-13 20:27:08 C 13 08 16.68 +31 29 47.4 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)