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
2008-04-26 21:55:40 C 18 02 01.25 +50 38 22.0 o 084
2008-04-26 21:59:40 C 18 02 01.36 +50 38 29.3 d 557
2008-04-26 22:00:16 C 18 02 00.93 +50 38 30.0 o 084
2008-04-26 22:04:30 C 18 02 00.65 +50 38 37.2 o 084
2008-04-26 22:09:53 C 18 02 00.28 +50 38 46.5 o 084
2008-04-26 22:14:07 C 18 01 59.97 +50 38 53.8 o 084
2008-04-26 22:18:47 C 18 01 59.67 +50 39 01.8 o 084
2008-04-26 22:23:00 C 18 01 59.38 +50 39 08.9 o 084
2008-04-26 22:28:44 C 18 01 58.97 +50 39 18.9 o 084
2008-04-26 22:32:57 C 18 01 58.68 +50 39 25.9 o 084
2008-04-26 22:43:14 C 18 01 57.96 +50 39 43.7 o 084
2008-04-26 22:47:28 C 18 01 57.67 +50 39 50.7 o 084
2008-04-26 22:52:22 C 18 01 57.33 +50 39 59.1 o 084
2008-04-26 22:56:36 C 18 01 57.06 +50 40 06.2 o 084
2008-04-26 23:01:35 C 18 01 56.71 +50 40 14.6 o 084
2008-04-26 23:05:49 C 18 01 56.41 +50 40 22.0 o 084
2008-04-26 23:11:51 C 18 01 55.98 +50 40 32.3 o 084
2008-04-26 23:16:04 C 18 01 55.70 +50 40 39.4 o 084
2008-04-26 23:21:28 C 18 01 55.31 +50 40 48.8 o 084
2008-04-26 23:25:41 C 18 01 55.02 +50 40 55.7 o 084
2008-04-26 23:30:48 C 18 01 54.67 +50 41 04.6 o 084
2008-04-26 23:35:02 C 18 01 54.36 +50 41 11.8 o 084
2008-04-26 23:40:29 C 18 01 53.98 +50 41 21.0 o 084
2008-04-26 23:44:43 C 18 01 53.69 +50 41 28.3 o 084
2008-04-26 23:51:22 C 18 01 53.23 +50 41 39.4 o 084
2008-04-26 23:55:36 C 18 01 52.92 +50 41 46.6 o 084
2008-04-27 00:00:44 C 18 01 52.96 +50 41 57.2 d 557
2008-04-27 00:00:48 C 18 01 52.57 +50 41 55.2 o 084
2008-04-27 00:05:01 C 18 01 52.27 +50 42 02.5 o 084
2008-04-27 00:11:06 C 18 01 51.85 +50 42 13.1 o 084
2008-04-27 00:15:20 C 18 01 51.53 +50 42 20.2 o 084
2008-04-27 00:22:26 C 18 01 51.05 +50 42 32.0 o 084
2008-04-27 00:26:40 C 18 01 50.73 +50 42 39.6 o 084
2008-04-27 00:31:01 C 18 01 50.81 +50 42 48.9 d 557
2008-04-27 00:31:09 C 18 01 50.45 +50 42 46.6 o 084
2008-04-27 00:35:22 C 18 01 50.15 +50 42 53.8 o 084
2008-04-27 00:41:30 C 18 01 49.69 +50 43 04.7 o 084
2008-04-27 00:45:44 C 18 01 49.41 +50 43 11.5 o 084
2008-04-27 00:51:23 C 18 01 49.00 +50 43 21.2 o 084
2008-04-27 00:55:38 C 18 01 48.70 +50 43 28.5 o 084
2008-04-27 01:31:35 C 18 01 46.49 +50 44 31.7 d 557
2008-04-27 02:01:52 C 18 01 44.32 +50 45 22.8 d 557
2008-04-27 19:52:52 C 18 00 31.45 +51 15 05.4 o 084
2008-04-27 19:57:06 C 18 00 31.16 +51 15 12.1 o 084
2008-04-27 20:01:19 C 18 00 30.86 +51 15 19.4 o 084
2008-04-27 20:05:33 C 18 00 30.56 +51 15 26.7 o 084
2008-04-27 20:14:02 C 18 00 29.96 +51 15 41.0 o 084
2008-04-27 20:18:16 C 18 00 29.64 +51 15 48.1 o 084
2008-04-27 20:22:30 C 18 00 29.35 +51 15 55.3 o 084
2008-04-27 20:26:44 C 18 00 29.04 +51 16 02.5 o 084
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)