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
2008-04-22 09:03:29 C 18 08 07.93 +47 29 00.2 r H45
2008-04-23 02:07:39 C 18 07 18.61 +47 59 23.9 o 204
2008-04-23 02:29:12 C 18 07 17.44 +48 00 02.5 o 204
2008-04-23 02:42:54 C 18 07 16.69 +48 00 27.0 o 204
2008-04-25 00:21:33 C 18 04 50.00 +49 20 28.3 o 084
2008-04-25 00:24:46 C 18 04 49.80 +49 20 33.9 o 084
2008-04-25 00:29:52 C 18 04 49.48 +49 20 42.8 o 084
2008-04-25 00:33:05 C 18 04 49.29 +49 20 48.4 o 084
2008-04-25 00:36:18 C 18 04 49.09 +49 20 54.0 o 084
2008-04-25 00:39:31 C 18 04 48.89 +49 20 59.6 o 084
2008-04-25 00:42:45 C 18 04 48.69 +49 21 05.3 o 084
2008-04-25 00:45:58 C 18 04 48.50 +49 21 10.8 o 084
2008-04-25 00:49:12 C 18 04 48.30 +49 21 16.5 o 084
2008-04-25 00:52:24 C 18 04 48.10 +49 21 22.1 o 084
2008-04-25 00:55:38 C 18 04 47.91 +49 21 27.5 o 084
2008-04-25 00:58:52 C 18 04 47.71 +49 21 33.4 o 084
2008-04-25 01:18:11 C 18 04 46.53 +49 22 07.0 o 084
2008-04-25 10:15:43 C 18 04 15.24 +49 37 43.7 r G96
2008-04-25 10:21:13 C 18 04 14.88 +49 37 53.2 r G96
2008-04-25 10:26:38 C 18 04 14.52 +49 38 02.6 r G96
2008-04-25 10:32:03 C 18 04 14.16 +49 38 12.0 r G96
2008-04-26 02:48:21 C 18 03 14.60 +50 06 03.7 c B19
2008-04-26 02:50:02 C 18 03 14.47 +50 06 06.7 c B19
2008-04-26 02:51:44 C 18 03 14.37 +50 06 09.6 c B19
2008-04-26 19:45:03 C 18 02 10.00 +50 34 38.1 o 084
2008-04-26 19:49:16 C 18 02 09.74 +50 34 45.4 o 084
2008-04-26 19:54:29 C 18 02 09.39 +50 34 54.3 o 084
2008-04-26 19:58:43 C 18 02 09.12 +50 35 01.6 o 084
2008-04-26 20:03:48 C 18 02 08.78 +50 35 10.5 o 084
2008-04-26 20:08:01 C 18 02 08.51 +50 35 17.5 o 084
2008-04-26 20:17:42 C 18 02 07.85 +50 35 34.1 o 084
2008-04-26 20:21:55 C 18 02 07.57 +50 35 41.7 o 084
2008-04-26 20:28:41 C 18 02 07.12 +50 35 53.1 o 084
2008-04-26 20:31:33 C 18 02 07.23 +50 35 57.4 d 557
2008-04-26 20:32:54 C 18 02 06.84 +50 36 00.2 o 084
2008-04-26 20:43:01 C 18 02 06.16 +50 36 17.7 o 084
2008-04-26 20:47:15 C 18 02 05.89 +50 36 25.0 o 084
2008-04-26 20:53:18 C 18 02 05.46 +50 36 35.3 o 084
2008-04-26 20:57:32 C 18 02 05.19 +50 36 42.7 o 084
2008-04-26 21:01:50 C 18 02 05.24 +50 36 49.5 d 557
2008-04-26 21:04:36 C 18 02 04.71 +50 36 54.8 o 084
2008-04-26 21:08:50 C 18 02 04.42 +50 37 02.0 o 084
2008-04-26 21:14:11 C 18 02 04.05 +50 37 11.2 o 084
2008-04-26 21:18:25 C 18 02 03.77 +50 37 18.4 o 084
2008-04-26 21:32:07 C 18 02 03.22 +50 37 41.8 d 557
2008-04-26 21:33:09 C 18 02 02.78 +50 37 43.0 o 084
2008-04-26 21:37:23 C 18 02 02.49 +50 37 50.8 o 084
2008-04-26 21:41:50 C 18 02 02.19 +50 37 58.4 o 084
2008-04-26 21:46:03 C 18 02 01.88 +50 38 05.3 o 084
2008-04-26 21:51:26 C 18 02 01.55 +50 38 14.8 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)