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
2008-04-14 01:14:41 C 18 14 25.30 +41 15 46.4 d 557
2008-04-14 01:48:40 C 18 14 24.60 +41 16 52.6 d 557
2008-04-14 02:21:27 C 18 14 23.89 +41 17 56.4 d 557
2008-04-14 02:49:54 C 18 14 23.26 +41 18 51.6 d 557
2008-04-14 08:33:49 C 18 14 17.73 +41 29 58.1 15.2 c 704
2008-04-14 08:49:33 C 18 14 17.37 +41 30 28.9 15.6 c 704
2008-04-14 09:05:21 C 18 14 17.01 +41 30 59.8 15.4 c 704
2008-04-14 09:21:01 C 18 14 16.64 +41 31 30.6 15.5 c 704
2008-04-14 09:37:13 C 18 14 16.29 +41 32 02.4 15.5 c 704
2008-04-15 07:26:55 C 18 13 50.31 +42 13 57.4 r H45
2008-04-15 07:31:55 C 18 13 50.19 +42 14 07.1 r H45
2008-04-15 07:33:04 C 18 13 50.17 +42 14 09.3 r H45
2008-04-15 07:35:30 C 18 13 50.09 +42 14 14.1 r H45
2008-04-15 07:36:33 C 18 13 50.06 +42 14 16.0 r H45
2008-04-16 23:59:01 C 18 12 51.24 +43 31 02.3 d 557
2008-04-17 00:30:03 C 18 12 50.31 +43 32 01.7 d 557
2008-04-17 01:01:04 C 18 12 49.36 +43 33 01.0 d 557
2008-04-17 01:29:30 C 18 12 48.49 +43 33 55.2 d 557
2008-04-17 01:57:57 C 18 12 47.60 +43 34 49.2 d 557
2008-04-17 02:28:59 C 18 12 46.62 +43 35 48.3 d 557
2008-04-17 03:00:01 C 18 12 45.62 +43 36 46.8 d 557
2008-04-17 07:24:29 C 18 12 39.12 +43 45 07.1 r H45
2008-04-17 07:25:48 C 18 12 39.09 +43 45 09.7 r H45
2008-04-17 07:28:11 C 18 12 39.04 +43 45 14.5 r H45
2008-04-17 07:29:03 C 18 12 39.00 +43 45 16.2 r H45
2008-04-17 07:30:35 C 18 12 38.96 +43 45 19.0 r H45
2008-04-19 03:18:44 C 18 11 16.30 +45 07 13.0 c B19
2008-04-19 03:21:01 C 18 11 16.21 +45 07 17.2 c B19
2008-04-19 03:23:17 C 18 11 16.15 +45 07 21.4 c B19
2008-04-19 08:36:33 C 18 11 05.62 +45 17 02.4 r H45
2008-04-19 08:39:25 C 18 11 05.52 +45 17 07.8 r H45
2008-04-19 08:41:19 C 18 11 05.44 +45 17 11.4 r H45
2008-04-19 08:42:49 C 18 11 05.37 +45 17 14.1 r H45
2008-04-19 08:45:14 C 18 11 05.28 +45 17 18.7 r H45
2008-04-20 21:56:32 C 18 09 40.88 +46 25 26.0 o A92
2008-04-20 22:09:31 C 18 09 40.29 +46 25 50.3 o A92
2008-04-20 22:52:33 C 18 09 38.40 +46 27 09.9 o A92
2008-04-20 23:01:22 C 18 09 37.99 +46 27 26.4 o A92
2008-04-22 00:22:55 C 18 08 31.76 +47 13 18.1 o 084
2008-04-22 00:26:09 C 18 08 31.60 +47 13 23.8 o 084
2008-04-22 00:30:09 C 18 08 31.40 +47 13 31.2 o 084
2008-04-22 00:33:21 C 18 08 31.25 +47 13 36.9 o 084
2008-04-22 00:37:21 C 18 08 31.06 +47 13 44.1 o 084
2008-04-22 00:40:34 C 18 08 30.90 +47 13 50.0 o 084
2008-04-22 00:44:21 C 18 08 30.71 +47 13 56.8 o 084
2008-04-22 00:47:33 C 18 08 30.55 +47 14 02.6 o 084
2008-04-22 08:44:01 C 18 08 08.96 +47 28 25.0 r H45
2008-04-22 08:45:24 C 18 08 08.87 +47 28 27.5 r H45
2008-04-22 08:46:14 C 18 08 08.85 +47 28 29.1 r H45
2008-04-22 09:01:27 C 18 08 08.04 +47 28 56.7 r H45
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)