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
2005-04-16 08:16:17 C 17 14 47.98 +56 48 26.8 15.6 c 704
2005-04-16 08:31:50 C 17 14 45.39 +56 48 51.2 15.4 c 704
2005-04-16 08:46:47 C 17 14 42.89 +56 49 14.7 15.5 c 704
2005-04-16 09:02:15 C 17 14 40.31 +56 49 38.9 15.5 c 704
2005-04-16 15:05:30 C 17 13 43.22 +56 58 52.7 o 379
2005-04-16 15:07:10 C 17 13 42.94 +56 58 55.3 o 379
2005-04-16 15:08:48 C 17 13 42.66 +56 58 57.8 o 379
2005-04-16 15:10:28 C 17 13 42.43 +56 59 00.4 o 379
2005-04-16 15:12:06 C 17 13 42.10 +56 59 02.7 o 379
2005-04-16 15:15:25 C 17 13 41.57 +56 59 08.3 o 379
2005-04-16 15:17:03 C 17 13 41.30 +56 59 10.8 o 379
2005-04-16 15:18:43 C 17 13 41.02 +56 59 13.4 o 379
2005-04-16 15:20:21 C 17 13 40.73 +56 59 15.9 o 379
2005-04-16 21:42:46 C 17 12 39.35 +57 08 48.6 c 118
2005-04-16 21:47:07 C 17 12 38.66 +57 08 55.2 c 118
2005-04-16 21:51:27 C 17 12 37.94 +57 09 02.0 c 118
2005-04-16 21:58:00 C 17 12 36.84 +57 09 12.3 c 118
2005-04-16 22:04:31 C 17 12 35.80 +57 09 22.3 c 118
2005-04-16 23:00:52 C 17 12 25.98 +57 10 47.2 o 084
2005-04-16 23:03:02 C 17 12 25.63 +57 10 50.1 o 084
2005-04-17 15:01:15 C 17 09 49.73 +57 34 36.4 r 379
2005-04-17 15:02:53 C 17 09 49.41 +57 34 39.2 r 379
2005-04-17 15:06:12 C 17 09 48.84 +57 34 44.2 r 379
2005-04-17 15:09:30 C 17 09 48.26 +57 34 49.2 r 379
2005-04-17 15:11:08 C 17 09 48.00 +57 34 51.7 r 379
2005-04-17 15:12:48 C 17 09 47.73 +57 34 54.2 r 379
2005-04-17 15:16:05 C 17 09 47.13 +57 34 59.0 r 379
2005-04-17 23:55:59 C 17 08 19.51 +57 47 26.5 o 084
2005-04-17 23:58:09 C 17 08 19.14 +57 47 29.6 o 084
2005-04-18 07:49:18 C 17 07 00.20 +57 58 49.3 c H45
2005-04-18 07:56:57 C 17 06 58.81 +57 59 00.2 c H45
2005-04-18 07:59:08 C 17 06 58.49 +57 59 03.4 c H45
2005-04-18 08:00:28 C 17 06 58.25 +57 59 05.2 c H45
2005-04-18 08:01:45 C 17 06 58.00 +57 59 06.9 c H45
2005-04-19 00:24:25 C 17 04 09.03 +58 21 46.0 o 084
2005-04-19 23:10:01 C 17 00 09.20 +58 52 10.3 o 084
2005-04-19 23:12:11 C 17 00 08.81 +58 52 13.1 o 084
2005-04-20 20:27:42 C 16 56 19.16 +59 19 11.8 c 127
2005-04-20 20:33:04 C 16 56 18.17 +59 19 18.6 c 127
2005-04-20 20:42:12 C 16 56 16.52 +59 19 30.6 c 127
2005-04-20 20:48:27 C 16 56 15.35 +59 19 38.5 c 127
2005-04-20 20:55:00 C 16 56 14.14 +59 19 47.0 c 127
2005-04-21 01:21:22 C 16 55 23.230 +59 25 31.15 q A84
2005-04-21 01:22:29 C 16 55 23.023 +59 25 32.46 q A84
2005-04-21 01:23:36 C 16 55 22.802 +59 25 33.85 q A84
2005-04-21 01:24:44 C 16 55 22.577 +59 25 35.28 q A84
2005-04-21 01:25:51 C 16 55 22.363 +59 25 36.62 q A84
2005-04-21 01:26:58 C 16 55 22.137 +59 25 38.05 q A84
2005-04-21 01:28:06 C 16 55 21.935 +59 25 39.33 q A84
2005-04-21 01:29:13 C 16 55 21.712 +59 25 40.73 q A84
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)