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
2025-05-04 19:21:50 C 14 34 58.34 +65 30 22.9 q 168
2025-05-04 19:46:35 C 14 34 52.86 +65 30 11.3 q 168
2025-05-04 20:14:39 C 14 34 46.66 +65 29 57.9 q 168
2025-05-04 20:23:05 B 14 34 46.05 +65 29 54.7 X G02
2025-05-04 20:28:35 B 14 34 44.84 +65 29 52.3 X G02
2025-05-04 20:33:50 B 14 34 43.68 +65 29 50.0 X G02
2025-05-04 20:42:34 C 14 34 40.49 +65 29 44.4 q 168
2025-05-04 21:08:38 C 14 34 34.74 +65 29 31.8 q 168
2025-05-04 21:22:39 C 14 34 31.66 +65 29 24.9 q 168
2025-05-04 21:25:11 C 14 34 32.654 +65 29 25.08 Z C23
2025-05-04 21:49:58 C 14 34 27.173 +65 29 13.85 Z C23
2025-05-05 04:29:26 B 14 33 01.421 +65 26 02.40 q X04
2025-05-05 05:02:44 B 14 32 54.113 +65 25 45.73 q X04
2025-05-05 05:27:54 B 14 32 48.614 +65 25 33.42 q X04
2025-05-05 20:02:01 C 14 29 46.56 +65 18 08.5 q 168
2025-05-05 20:23:02 C 14 29 42.09 +65 17 57.3 q 168
2025-05-05 20:47:05 C 14 29 36.97 +65 17 44.6 q 168
2025-05-05 21:11:59 C 14 29 31.70 +65 17 31.4 q 168
2025-05-05 21:31:00 B 14 29 28.09 +65 17 25.1 X L76
2025-05-05 21:36:03 C 14 29 26.55 +65 17 18.2 q 168
2025-05-05 21:36:14 B 14 29 26.97 +65 17 22.4 X L76
2025-05-05 21:41:28 B 14 29 25.85 +65 17 19.6 X L76
2025-05-05 21:46:42 B 14 29 24.73 +65 17 16.7 X L76
2025-05-05 21:51:57 B 14 29 23.60 +65 17 13.9 X L76
2025-05-05 21:54:09 C 14 29 22.74 +65 17 08.3 q 168
2025-05-05 21:56:03 B 14 29 23.702 +65 17 09.92 V L65
2025-05-05 21:57:11 B 14 29 22.48 +65 17 11.1 X L76
2025-05-05 22:06:10 C 14 29 20.20 +65 17 01.8 q 168
2025-05-05 22:06:31 C 14 29 21.598 +65 17 04.85 Z C23
2025-05-05 22:16:24 C 14 29 19.572 +65 16 59.27 Z C23
2025-05-05 23:00:11 B 14 29 10.049 +65 16 36.52 V L65
2025-05-06 00:04:29 B 14 28 56.378 +65 16 02.17 V L65
2025-05-06 10:37:08 C 14 26 47.760 +65 10 30.76 V T08
2025-05-06 10:43:07 C 14 26 46.471 +65 10 27.12 V T08
2025-05-06 11:07:44 C 14 26 41.230 +65 10 13.40 V T08
2025-05-06 11:09:03 C 14 26 40.956 +65 10 12.61 V T08
2025-05-06 22:39:44 B 14 24 24.514 +65 03 39.02 q Y84
2025-05-06 22:45:16 B 14 24 23.371 +65 03 35.96 q Y84
2025-05-06 22:50:46 B 14 24 22.262 +65 03 32.72 q Y84
2025-05-07 23:51:18 C 14 19 32.263 +64 48 48.42 V R17
2025-05-08 00:12:45 C 14 19 27.984 +64 48 35.39 V R17
2025-05-08 00:35:09 C 14 19 23.515 +64 48 21.67 V R17
2025-05-08 00:56:52 C 14 19 19.174 +64 48 08.03 V R17
2025-05-08 20:38:02 B 14 15 41.386 +64 35 33.25 Z K35
2025-05-08 20:39:34 B 14 15 41.105 +64 35 32.24 Z K35
2025-05-08 20:40:05 B 14 15 41.014 +64 35 31.99 Z K35
2025-05-08 22:05:50 C 14 15 24.828 +64 34 37.31 Z C23
2025-05-08 23:54:18 C 14 15 04.418 +64 33 26.64 Z C23
2025-05-09 00:15:27 C 14 15 00.384 +64 33 12.17 Z C23
2025-05-09 20:32:38 C 14 11 25.34 +64 19 38.4 Z L04
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)