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
2008-04-29 00:46:54 C 17 58 23.47 +52 02 47.3 o 084
2008-04-29 00:51:24 C 17 58 23.11 +52 02 54.5 o 084
2008-04-29 00:55:47 C 17 58 22.78 +52 03 02.0 o 084
2008-04-29 07:17:02 C 17 57 54.24 +52 13 27.1 r H45
2008-04-29 07:18:12 C 17 57 54.14 +52 13 29.2 r H45
2008-04-29 07:20:38 C 17 57 53.94 +52 13 33.1 r H45
2008-04-29 07:23:32 C 17 57 53.72 +52 13 38.0 r H45
2008-04-29 07:25:45 C 17 57 53.50 +52 13 41.6 r H45
2008-04-29 22:14:50 C 17 56 42.96 +52 37 28.4 o 084
2008-04-29 22:25:53 C 17 56 42.05 +52 37 46.2 o 084
2008-04-29 22:31:08 C 17 56 41.60 +52 37 54.8 o 084
2008-04-29 22:36:22 C 17 56 41.17 +52 38 03.3 o 084
2008-04-29 22:41:37 C 17 56 40.73 +52 38 11.9 o 084
2008-04-29 22:46:50 C 17 56 40.29 +52 38 20.3 o 084
2008-04-29 22:52:05 C 17 56 39.84 +52 38 28.9 o 084
2008-04-29 22:57:19 C 17 56 39.40 +52 38 37.4 o 084
2008-04-29 23:02:33 C 17 56 38.96 +52 38 45.7 o 084
2008-04-29 23:18:16 C 17 56 37.60 +52 39 11.5 o 084
2008-04-29 23:23:30 C 17 56 37.18 +52 39 19.8 o 084
2008-04-29 23:28:44 C 17 56 36.73 +52 39 28.4 o 084
2008-04-29 23:33:59 C 17 56 36.29 +52 39 36.8 o 084
2008-04-29 23:39:14 C 17 56 35.84 +52 39 45.4 o 084
2008-04-29 23:44:28 C 17 56 35.39 +52 39 53.8 o 084
2008-04-29 23:49:43 C 17 56 34.96 +52 40 02.0 o 084
2008-04-30 00:15:55 C 17 56 32.74 +52 40 44.3 o 084
2008-04-30 00:26:24 C 17 56 31.83 +52 41 01.4 o 084
2008-04-30 00:31:39 C 17 56 31.38 +52 41 09.9 o 084
2008-04-30 08:33:31 C 17 55 52.07 +52 54 06.6 r H45
2008-04-30 08:37:24 C 17 55 51.73 +52 54 12.9 r H45
2008-04-30 08:39:44 C 17 55 51.53 +52 54 16.7 r H45
2008-04-30 08:41:38 C 17 55 51.34 +52 54 19.8 r H45
2008-04-30 08:42:49 C 17 55 51.25 +52 54 21.4 r H45
2008-05-01 08:21:32 C 17 53 50.43 +53 31 37.8 o 704
2008-05-01 08:36:01 C 17 53 49.10 +53 32 01.4 o 704
2008-05-01 08:50:25 C 17 53 47.76 +53 32 23.8 o 704
2008-05-01 09:05:13 C 17 53 46.34 +53 32 47.4 o 704
2008-05-01 09:19:47 C 17 53 44.96 +53 33 10.2 o 704
2008-05-01 20:26:19 C 17 52 45.86 +53 50 13.2 o 084
2008-05-01 20:30:32 C 17 52 45.48 +53 50 20.3 o 084
2008-05-01 20:34:46 C 17 52 45.09 +53 50 27.0 o 084
2008-05-01 20:39:00 C 17 52 44.71 +53 50 33.4 o 084
2008-05-01 20:43:13 C 17 52 44.30 +53 50 40.2 o 084
2008-05-01 20:47:28 C 17 52 43.93 +53 50 46.6 o 084
2008-05-01 20:51:41 C 17 52 43.54 +53 50 53.2 o 084
2008-05-01 20:55:55 C 17 52 43.15 +53 51 00.1 o 084
2008-05-01 21:00:08 C 17 52 42.77 +53 51 06.6 o 084
2008-05-01 21:04:21 C 17 52 42.37 +53 51 13.3 o 084
2008-05-01 21:08:35 C 17 52 41.99 +53 51 19.7 o 084
2008-05-01 21:12:49 C 17 52 41.60 +53 51 26.2 o 084
2008-05-01 21:17:02 C 17 52 41.16 +53 51 33.4 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)