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
2008-06-22 01:35:58 C 14 13 39.58 +60 51 50.9 15.5 c B06
2008-06-22 22:43:19 C 14 10 31.08 +60 34 24.7 c A06
2008-06-22 22:51:05 C 14 10 29.90 +60 34 17.5 c A06
2008-06-23 05:37:28 C 14 09 29.95 +60 28 33.7 c H45
2008-06-23 05:40:58 C 14 09 29.44 +60 28 30.5 c H45
2008-06-23 05:42:32 C 14 09 29.23 +60 28 29.1 c H45
2008-06-23 05:52:04 C 14 09 27.78 +60 28 20.8 c H45
2008-06-23 05:58:07 C 14 09 26.83 +60 28 15.4 c H45
2008-06-24 21:20:20 C 14 03 49.33 +59 53 52.9 c B37
2008-06-24 21:24:27 C 14 03 48.75 +59 53 49.2 c B37
2008-06-24 21:27:21 C 14 03 48.33 +59 53 46.7 c B37
2008-06-24 21:30:16 C 14 03 47.91 +59 53 43.8 c B37
2008-06-24 21:32:39 C 14 03 47.57 +59 53 41.7 c B37
2008-06-24 21:49:37 C 14 03 45.04 +59 53 26.3 c B37
2008-07-02 05:21:23 C 13 41 07.47 +57 01 06.8 r 703
2008-07-02 05:26:13 C 13 41 06.93 +57 01 01.5 r 703
2008-07-02 05:31:05 C 13 41 06.32 +57 00 55.8 r 703
2008-07-02 05:36:04 C 13 41 05.67 +57 00 50.2 r 703
2008-07-02 20:31:04 C 13 39 20.19 +56 44 51.9 c A30
2008-07-02 20:32:55 C 13 39 19.99 +56 44 50.1 c A30
2008-07-02 20:34:47 C 13 39 19.79 +56 44 47.4 c A30
2008-07-02 20:37:01 C 13 39 19.49 +56 44 45.5 c A30
2008-07-02 20:38:51 C 13 39 19.27 +56 44 43.6 c A30
2008-07-03 20:51:21 C 13 36 29.11 +56 18 20.2 15.8 o C20
2008-07-03 22:23:49 C 13 36 18.45 +56 16 35.5 16.1 o C20
2008-07-09 20:11:12 C 13 20 30.41 +53 32 55.2 o A81
2008-07-09 20:14:14 C 13 20 30.07 +53 32 51.3 o A81
2008-07-09 20:17:16 C 13 20 29.72 +53 32 47.6 o A81
2008-07-09 20:20:18 C 13 20 29.39 +53 32 44.0 o A81
2008-07-09 20:23:20 C 13 20 29.03 +53 32 40.0 o A81
2008-07-09 21:13:56 C 13 20 23.76 +53 31 44.0 o J51
2008-07-09 21:19:49 C 13 20 23.07 +53 31 36.6 o J51
2008-07-09 21:25:42 C 13 20 22.31 +53 31 29.2 o J51
2008-07-15 22:12:55 C 13 04 33.27 +50 26 05.6 c 442
2008-07-15 22:14:51 C 13 04 33.06 +50 26 02.9 c 442
2008-07-16 18:58:48 C 13 02 14.23 +49 57 52.2 14.0 o C20
2008-07-18 19:47:59 C 12 56 40.46 +48 49 30.3 o C20
2008-07-21 19:58:35 C 12 48 04.88 +47 02 58.1 15.6 o C20
2008-07-22 02:44:45 C 12 47 14.90 +46 52 42.7 r H53
2008-07-22 02:46:00 C 12 47 14.77 +46 52 40.8 r H53
2008-07-22 02:47:06 C 12 47 14.62 +46 52 39.1 r H53
2008-07-22 02:48:22 C 12 47 14.46 +46 52 37.1 r H53
2008-07-22 02:49:31 C 12 47 14.33 +46 52 35.3 r H53
2008-07-22 02:50:45 C 12 47 14.12 +46 52 33.3 r H53
2008-07-22 18:39:14 C 12 45 15.99 +46 28 01.3 15.8 r C20
2008-07-22 20:07:03 C 12 45 05.00 +46 25 39.2 15.5 o C20
2008-07-22 20:16:23 C 12 45 03.80 +46 25 24.4 15.6 r C20
2008-07-23 19:02:52 C 12 42 10.00 +45 49 25.2 13.8 o C20
2008-07-23 19:07:31 C 12 42 09.49 +45 49 18.3 15.8 o C20
2008-07-24 18:47:32 C 12 39 04.34 +45 10 55.0 15.4 r C20
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)