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
2022-06-01 18:42:33 C 12 14 22.63 +50 01 52.6 V C40
2022-06-01 18:43:37 C 12 14 22.68 +50 01 51.5 V C40
2022-06-01 18:43:58 C 12 14 22.69 +50 01 51.0 V C40
2022-06-01 18:45:01 C 12 14 22.73 +50 01 49.7 V C40
2022-06-01 18:45:44 C 12 14 22.77 +50 01 48.9 V C40
2022-06-01 18:46:26 C 12 14 22.79 +50 01 48.1 V C40
2022-06-01 18:47:08 C 12 14 22.83 +50 01 47.3 V C40
2022-06-01 18:48:33 C 12 14 22.88 +50 01 45.6 V C40
2022-06-01 18:48:54 C 12 14 22.90 +50 01 45.3 V C40
2022-06-01 18:50:41 C 12 14 22.98 +50 01 43.3 V C40
2022-06-01 18:51:02 C 12 14 22.98 +50 01 42.8 V C40
2022-06-01 18:52:05 C 12 14 23.04 +50 01 41.7 V C40
2022-06-01 18:53:09 C 12 14 23.08 +50 01 40.4 V C40
2022-06-01 18:56:19 C 12 14 23.22 +50 01 36.7 V C40
2022-06-01 18:57:02 C 12 14 23.25 +50 01 35.9 V C40
2022-06-01 18:58:26 C 12 14 23.31 +50 01 34.2 V C40
2022-06-01 18:58:47 C 12 14 23.33 +50 01 33.8 V C40
2022-06-01 18:59:09 C 12 14 23.33 +50 01 33.5 V C40
2022-06-01 19:00:13 C 12 14 23.38 +50 01 32.1 V C40
2022-06-01 19:00:33 C 12 14 23.39 +50 01 31.8 V C40
2022-06-01 19:01:16 C 12 14 23.42 +50 01 31.0 V C40
2022-06-01 19:40:33 C 12 14 25.10 +50 00 45.4 V C40
2022-06-01 19:41:15 C 12 14 25.12 +50 00 44.5 V C40
2022-06-01 19:41:37 C 12 14 25.14 +50 00 44.2 V C40
2022-06-01 19:41:57 C 12 14 25.17 +50 00 43.7 V C40
2022-06-01 19:43:01 C 12 14 25.20 +50 00 42.5 V C40
2022-06-01 19:43:22 C 12 14 25.22 +50 00 42.0 V C40
2022-06-01 19:45:51 C 12 14 25.32 +50 00 39.2 V C40
2022-06-01 19:46:12 C 12 14 25.35 +50 00 38.7 V C40
2022-06-01 19:46:33 C 12 14 25.35 +50 00 38.3 V C40
2022-06-01 19:47:59 C 12 14 25.41 +50 00 36.6 V C40
2022-06-01 19:48:19 C 12 14 25.43 +50 00 36.3 V C40
2022-06-01 19:48:40 C 12 14 25.45 +50 00 35.9 V C40
2022-06-01 19:50:06 C 12 14 25.50 +50 00 34.2 V C40
2022-06-01 19:50:49 C 12 14 25.54 +50 00 33.4 V C40
2022-06-01 19:51:10 C 12 14 25.55 +50 00 33.0 V C40
2022-06-01 19:53:38 C 12 14 25.67 +50 00 30.2 V C40
2022-06-01 19:55:04 C 12 14 25.73 +50 00 28.5 V C40
2022-06-01 19:56:08 C 12 14 25.76 +50 00 27.2 V C40
2022-06-01 19:56:49 C 12 14 25.80 +50 00 26.4 V C40
2022-06-01 19:57:11 C 12 14 25.81 +50 00 26.0 V C40
2022-06-01 19:57:53 C 12 14 25.84 +50 00 25.2 V C40
2022-06-01 19:58:15 C 12 14 25.85 +50 00 24.7 V C40
2022-06-01 19:59:19 C 12 14 25.90 +50 00 23.4 V C40
2022-06-01 19:59:39 C 12 14 25.92 +50 00 23.0 V C40
2022-06-01 20:00:22 C 12 14 25.94 +50 00 22.2 V C40
2022-06-01 20:01:03 C 12 14 25.98 +50 00 21.4 V C40
2022-06-01 20:09:10 C 12 14 26.32 +50 00 12.0 V C40
2022-06-01 20:09:31 C 12 14 26.34 +50 00 11.6 V C40
2022-06-01 20:10:14 C 12 14 26.37 +50 00 10.8 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)