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
2005-04-21 01:30:21 C 16 55 21.492 +59 25 42.13 q A84
2005-04-21 14:35:02 C 16 52 57.60 +59 41 29.4 o 379
2005-04-21 14:41:39 C 16 52 56.34 +59 41 37.7 o 379
2005-04-21 14:46:35 C 16 52 55.37 +59 41 43.8 o 379
2005-04-21 14:48:14 C 16 52 55.06 +59 41 45.4 o 379
2005-04-21 20:56:37 C 16 51 45.96 +59 48 50.8 c 127
2005-04-21 21:02:24 C 16 51 44.87 +59 48 57.9 c 127
2005-04-21 21:08:52 C 16 51 43.62 +59 49 05.6 c 127
2005-04-21 21:15:52 C 16 51 42.29 +59 49 14.2 c 127
2005-04-21 21:22:13 C 16 51 41.10 +59 49 22.0 c 127
2005-04-21 21:58:25 C 16 51 33.50 +59 50 07.2 o 084
2005-04-21 22:00:34 C 16 51 33.16 +59 50 09.7 o 084
2005-04-21 22:40:09 C 16 51 26.17 +59 50 57.6 o 198
2005-04-21 22:41:57 C 16 51 25.81 +59 50 59.8 o 198
2005-04-21 22:44:50 C 16 51 25.26 +59 51 03.3 o 198
2005-04-21 22:47:21 C 16 51 24.77 +59 51 06.3 o 198
2005-04-21 22:48:26 C 16 51 24.56 +59 51 07.6 o 198
2005-04-21 23:01:08 C 16 51 21.88 +59 51 21.9 o A32
2005-04-21 23:03:20 C 16 51 21.45 +59 51 24.5 o A32
2005-04-21 23:04:56 C 16 51 21.15 +59 51 26.1 o A32
2005-04-21 23:06:33 C 16 51 20.85 +59 51 27.9 o A32
2005-04-22 08:26:57 C 16 49 34.22 +60 02 23.4 o 699
2005-04-22 08:38:02 C 16 49 32.00 +60 02 36.5 o 699
2005-04-22 08:49:07 C 16 49 29.78 +60 02 49.4 o 699
2005-04-22 09:00:16 C 16 49 27.56 +60 03 02.5 o 699
2005-04-22 20:25:36 C 16 47 16.84 +60 15 38.3 o 151
2005-04-22 20:26:20 C 16 47 16.70 +60 15 39.2 o 151
2005-04-22 20:27:06 C 16 47 16.55 +60 15 40.2 o 151
2005-04-22 20:27:50 C 16 47 16.41 +60 15 40.9 o 151
2005-04-22 23:39:45 C 16 46 37.79 +60 19 18.7 o 084
2005-04-22 23:41:54 C 16 46 37.34 +60 19 21.1 o 084
2005-04-23 08:01:14 C 16 45 00.10 +60 28 31.1 c H45
2005-04-23 08:03:20 C 16 44 59.69 +60 28 33.7 c H45
2005-04-23 08:05:20 C 16 44 59.22 +60 28 35.6 c H45
2005-04-23 08:07:25 C 16 44 58.81 +60 28 37.8 c H45
2005-04-23 08:08:26 C 16 44 58.58 +60 28 38.8 c H45
2005-04-25 23:35:22 C 16 32 09.85 +61 30 47.4 o 084
2005-04-25 23:37:32 C 16 32 09.41 +61 30 49.1 o 084
2005-04-27 00:30:22 C 16 26 56.21 +61 52 01.3 o 084
2005-04-27 00:32:31 C 16 26 55.74 +61 52 03.2 o 084
2005-04-27 13:42:31 C 16 24 09.80 +62 02 35.8 o 379
2005-04-27 13:44:11 C 16 24 09.45 +62 02 37.1 o 379
2005-04-27 13:50:46 C 16 24 07.88 +62 02 42.4 o 379
2005-04-27 13:52:26 C 16 24 07.61 +62 02 44.1 o 379
2005-04-27 13:54:04 C 16 24 07.25 +62 02 45.3 o 379
2005-04-27 13:55:43 C 16 24 06.86 +62 02 46.7 o 379
2005-04-28 07:16:47 C 16 20 22.92 +62 15 51.3 15.1 c 704
2005-04-28 07:32:45 C 16 20 19.31 +62 16 03.0 15.4 c 704
2005-04-28 07:50:32 C 16 20 15.34 +62 16 16.5 15.4 c 704
2005-04-28 08:08:19 C 16 20 11.24 +62 16 29.5 15.4 c 704
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)