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
2025-04-18 20:14:05 C 16 14 19.047 +65 11 24.61 W M01
2025-04-18 20:14:48 C 16 14 18.722 +65 11 24.22 W M01
2025-04-18 21:05:55 C 16 14 04.267 +65 12 02.67 W M01
2025-04-18 21:07:04 C 16 14 03.934 +65 12 03.38 W M01
2025-04-18 21:08:25 C 16 14 03.554 +65 12 04.49 W M01
2025-04-18 21:09:34 C 16 14 03.222 +65 12 05.22 W M01
2025-04-18 21:10:55 C 16 14 02.840 +65 12 06.30 W M01
2025-04-18 21:12:04 C 16 14 02.511 +65 12 07.05 W M01
2025-04-18 21:12:32 C 16 14 02.290 +65 12 06.98 W M01
2025-04-18 21:15:02 C 16 14 01.562 +65 12 08.67 W M01
2025-04-18 21:17:32 C 16 14 00.833 +65 12 10.35 W M01
2025-04-18 22:02:38 C 16 13 47.963 +65 12 43.42 W M01
2025-04-18 22:05:08 C 16 13 47.243 +65 12 45.20 W M01
2025-04-18 22:07:38 C 16 13 46.523 +65 12 46.99 W M01
2025-04-18 22:13:08 C 16 13 44.920 +65 12 50.86 W M01
2025-04-18 22:15:38 C 16 13 44.208 +65 12 52.60 W M01
2025-04-18 22:18:08 C 16 13 43.497 +65 12 54.34 W M01
2025-04-18 22:23:55 C 16 13 42.425 +65 12 47.56 Z C23
2025-04-18 22:34:14 C 16 13 39.331 +65 12 55.08 Z C23
2025-04-18 22:59:22 C 16 13 31.554 +65 13 23.05 W M01
2025-04-18 23:01:22 C 16 13 31.570 +65 13 14.16 Z C23
2025-04-18 23:01:52 C 16 13 30.830 +65 13 24.75 W M01
2025-04-18 23:04:22 C 16 13 30.106 +65 13 26.45 W M01
2025-04-18 23:55:59 C 16 13 15.116 +65 14 01.40 W M01
2025-04-18 23:58:29 C 16 13 14.390 +65 14 03.08 W M01
2025-04-19 00:00:59 C 16 13 13.665 +65 14 04.76 W M01
2025-04-19 00:28:08 C 16 13 05.766 +65 14 22.52 W M01
2025-04-19 00:30:38 C 16 13 05.041 +65 14 24.16 W M01
2025-04-19 00:33:08 C 16 13 04.316 +65 14 25.79 W M01
2025-04-19 00:53:37 C 16 12 58.379 +65 14 39.14 W M01
2025-04-19 00:56:07 C 16 12 57.656 +65 14 40.73 W M01
2025-04-19 00:58:36 C 16 12 56.932 +65 14 42.31 W M01
2025-04-19 00:59:27 C 16 12 56.680 +65 14 42.82 W M01
2025-04-19 01:01:57 C 16 12 55.952 +65 14 44.43 W M01
2025-04-19 01:04:27 C 16 12 55.224 +65 14 46.04 W M01
2025-04-19 01:11:33 C 16 12 53.166 +65 14 50.51 W M01
2025-04-19 01:14:03 C 16 12 52.437 +65 14 52.10 W M01
2025-04-19 01:16:33 C 16 12 51.709 +65 14 53.69 W M01
2025-04-19 01:22:35 C 16 12 49.961 +65 14 57.52 W M01
2025-04-19 01:25:05 C 16 12 49.234 +65 14 59.11 W M01
2025-04-19 01:27:35 C 16 12 48.507 +65 15 00.69 W M01
2025-04-19 01:33:07 C 16 12 46.910 +65 15 04.18 W M01
2025-04-19 01:35:37 C 16 12 46.184 +65 15 05.75 W M01
2025-04-19 01:38:07 C 16 12 45.458 +65 15 07.31 W M01
2025-04-19 01:44:11 C 16 12 43.703 +65 15 11.08 W M01
2025-04-19 01:46:41 C 16 12 42.978 +65 15 12.62 W M01
2025-04-19 01:49:11 C 16 12 42.252 +65 15 14.17 W M01
2025-04-19 01:58:12 C 16 12 39.657 +65 15 19.89 W M01
2025-04-19 02:00:42 C 16 12 38.937 +65 15 21.47 W M01
2025-04-19 02:03:12 C 16 12 38.218 +65 15 23.05 W M01
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)