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
2005-04-07 16:08:56 C 17 42 39.02 +50 31 01.5 o 379
2005-04-07 16:10:36 C 17 42 38.83 +50 31 05.1 o 379
2005-04-07 16:12:14 C 17 42 38.63 +50 31 08.4 o 379
2005-04-07 16:15:33 C 17 42 38.28 +50 31 15.4 o 379
2005-04-07 16:17:11 C 17 42 38.08 +50 31 19.2 o 379
2005-04-07 16:23:47 C 17 42 37.27 +50 31 32.7 o 379
2005-04-08 05:21:04 C 17 41 10.58 +50 58 00.4 c 750
2005-04-08 05:26:20 C 17 41 10.01 +50 58 11.3 c 750
2005-04-08 05:32:29 C 17 41 09.29 +50 58 24.2 c 750
2005-04-09 15:27:39 C 17 37 11.21 +52 06 19.0 o 379
2005-04-09 15:28:48 C 17 37 11.09 +52 06 21.0 o 379
2005-04-09 15:31:07 C 17 37 10.85 +52 06 25.4 o 379
2005-04-09 15:33:25 C 17 37 10.50 +52 06 30.3 o 379
2005-04-09 15:35:42 C 17 37 10.19 +52 06 34.8 o 379
2005-04-13 07:56:39 C 17 25 36.81 +54 49 49.6 c H45
2005-04-13 08:00:17 C 17 25 36.22 +54 49 55.8 c H45
2005-04-13 08:01:40 C 17 25 36.04 +54 49 58.3 c H45
2005-04-13 08:02:58 C 17 25 35.84 +54 50 00.6 c H45
2005-04-13 08:04:19 C 17 25 35.64 +54 50 02.7 c H45
2005-04-13 14:57:09 C 17 24 37.74 +55 01 50.9 o 379
2005-04-13 14:58:49 C 17 24 37.48 +55 01 54.1 o 379
2005-04-13 15:00:27 C 17 24 37.25 +55 01 56.7 o 379
2005-04-13 15:02:07 C 17 24 37.02 +55 01 59.5 o 379
2005-04-13 15:07:04 C 17 24 36.29 +55 02 08.3 o 379
2005-04-13 15:08:42 C 17 24 36.04 +55 02 11.6 o 379
2005-04-13 15:10:22 C 17 24 35.81 +55 02 14.6 o 379
2005-04-13 15:12:00 C 17 24 35.55 +55 02 17.2 o 379
2005-04-14 05:13:32 C 17 22 34.13 +55 26 00.0 c 750
2005-04-14 05:25:05 C 17 22 32.41 +55 26 20.0 c 750
2005-04-14 05:35:25 C 17 22 30.87 +55 26 37.9 c 750
2005-04-14 14:50:15 C 17 21 09.35 +55 42 07.1 o 379
2005-04-14 14:51:53 C 17 21 09.04 +55 42 09.4 o 379
2005-04-14 14:55:12 C 17 21 08.55 +55 42 15.3 o 379
2005-04-14 14:56:50 C 17 21 08.30 +55 42 18.1 o 379
2005-04-14 14:58:30 C 17 21 08.08 +55 42 20.9 o 379
2005-04-14 15:00:08 C 17 21 07.82 +55 42 23.8 o 379
2005-04-14 15:01:48 C 17 21 07.53 +55 42 26.6 o 379
2005-04-15 00:23:17 C 17 19 42.40 +55 57 44.5 o 084
2005-04-15 00:25:55 C 17 19 41.94 +55 57 49.2 o 084
2005-04-15 01:24:37 C 17 19 32.80 +55 59 25.2 o 084
2005-04-15 01:27:17 C 17 19 32.38 +55 59 29.5 o 084
2005-04-15 05:48:08 C 17 18 54.41 +56 06 31.1 c 750
2005-04-15 05:55:18 C 17 18 53.30 +56 06 42.9 c 750
2005-04-15 06:02:59 C 17 18 52.08 +56 06 55.8 c 750
2005-04-15 21:15:00 C 17 16 32.04 +56 31 04.5 c 118
2005-04-15 21:17:09 C 17 16 31.70 +56 31 07.9 c 118
2005-04-15 21:21:29 C 17 16 31.03 +56 31 14.9 c 118
2005-04-15 21:30:09 C 17 16 29.68 +56 31 29.1 c 118
2005-04-15 21:36:39 C 17 16 28.64 +56 31 39.6 c 118
2005-04-16 08:01:19 C 17 14 50.48 +56 48 03.0 15.5 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)