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
2008-03-25 01:58:40 C 18 10 58.82 +25 05 37.5 r 084
2008-03-28 01:56:17 C 18 12 43.93 +27 34 33.5 r 084
2008-03-28 01:59:30 C 18 12 43.95 +27 34 40.1 r 084
2008-03-29 01:53:28 C 18 13 14.28 +28 24 00.2 r 084
2008-03-29 01:56:40 C 18 13 14.34 +28 24 06.7 r 084
2008-03-30 01:54:36 C 18 13 42.21 +29 13 30.4 r 084
2008-03-30 01:57:49 C 18 13 42.26 +29 13 37.0 r 084
2008-03-31 23:44:33 C 18 14 28.47 +30 47 41.9 r 084
2008-03-31 23:54:42 C 18 14 28.60 +30 48 02.7 r 084
2008-03-31 23:57:54 C 18 14 28.65 +30 48 09.4 r 084
2008-04-01 00:20:37 C 18 14 28.96 +30 48 56.4 r 084
2008-04-01 00:49:45 C 18 14 29.30 +30 49 56.7 r 084
2008-04-01 00:53:08 C 18 14 29.35 +30 50 03.6 r 084
2008-04-03 01:07:03 C 18 15 06.32 +32 28 46.0 r 084
2008-04-03 01:56:30 C 18 15 06.72 +32 30 27.3 r 084
2008-04-03 01:59:43 C 18 15 06.74 +32 30 34.1 r 084
2008-04-03 02:25:48 C 18 15 06.94 +32 31 27.6 r 084
2008-04-03 02:29:02 C 18 15 06.93 +32 31 34.6 r 084
2008-04-04 08:50:45 C 18 15 24.43 +33 33 30.6 16.2 c 704
2008-04-04 09:07:09 C 18 15 24.63 +33 34 03.6 15.6 c 704
2008-04-04 09:23:33 C 18 15 24.72 +33 34 37.3 15.7 c 704
2008-04-04 09:40:07 C 18 15 24.75 +33 35 11.4 16.0 c 704
2008-04-04 09:56:41 C 18 15 24.83 +33 35 44.6 15.7 c 704
2008-04-05 01:32:52 C 18 15 30.98 +34 07 19.1 r 084
2008-04-05 01:58:16 C 18 15 31.08 +34 08 11.1 r 084
2008-04-05 02:01:30 C 18 15 31.08 +34 08 17.4 r 084
2008-04-12 09:17:04 C 18 15 01.43 +39 58 07.3 r H45
2008-04-12 09:19:15 C 18 15 01.40 +39 58 11.6 r H45
2008-04-12 09:21:17 C 18 15 01.35 +39 58 15.5 r H45
2008-04-12 09:22:45 C 18 15 01.33 +39 58 18.5 r H45
2008-04-12 09:24:52 C 18 15 01.30 +39 58 22.7 r H45
2008-04-13 00:34:03 C 18 14 49.17 +40 27 51.3 r 557
2008-04-13 01:01:35 C 18 14 48.71 +40 28 45.1 r 557
2008-04-13 01:29:07 C 18 14 48.20 +40 29 39.5 r 557
2008-04-13 01:59:24 C 18 14 47.65 +40 30 38.8 r 557
2008-04-13 02:29:40 C 18 14 47.08 +40 31 38.2 r 557
2008-04-13 02:59:57 C 18 14 46.51 +40 32 37.4 r 557
2008-04-13 08:29:43 C 18 14 42.30 +40 43 19.9 16.7 c 704
2008-04-13 08:46:26 C 18 14 41.99 +40 43 53.6 15.6 c 704
2008-04-13 09:02:45 C 18 14 41.64 +40 44 26.1 15.5 c 704
2008-04-13 09:19:07 C 18 14 41.35 +40 44 57.9 15.7 c 704
2008-04-13 09:35:20 C 18 14 41.04 +40 45 29.8 15.6 c 704
2008-04-13 21:16:45 C 18 14 29.81 +41 07 59.1 d 557
2008-04-13 21:45:12 C 18 14 29.31 +41 08 55.1 d 557
2008-04-13 22:16:14 C 18 14 28.77 +41 09 56.2 d 557
2008-04-13 22:44:42 C 18 14 28.26 +41 10 52.2 d 557
2008-04-13 23:15:44 C 18 14 27.68 +41 11 53.5 d 557
2008-04-13 23:44:11 C 18 14 27.15 +41 12 49.1 d 557
2008-04-14 00:15:13 C 18 14 26.53 +41 13 49.9 d 557
2008-04-14 00:46:15 C 18 14 25.90 +41 14 50.6 d 557
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)