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
2005-05-27 21:54:06 C 14 04 57.24 +60 12 18.0 d 048
2005-05-27 21:54:40 C 14 04 57.18 +60 12 17.4 d 048
2005-05-27 22:27:04 C 14 04 53.28 +60 11 49.7 o A32
2005-05-27 22:31:55 C 14 04 52.66 +60 11 45.6 o A32
2005-05-27 22:36:46 C 14 04 51.98 +60 11 41.8 o A32
2005-05-27 22:41:37 C 14 04 51.44 +60 11 37.9 o A32
2005-05-27 22:48:04 C 14 04 50.62 +60 11 32.7 o A32
2005-05-28 20:14:07 C 14 02 21.27 +59 53 48.3 o 151
2005-05-28 20:18:10 C 14 02 20.77 +59 53 45.0 o 151
2005-05-28 20:19:53 C 14 02 20.55 +59 53 43.6 o 151
2005-05-28 20:21:02 C 14 02 20.45 +59 53 42.7 o 151
2005-05-28 20:48:49 C 14 02 17.31 +59 53 21.2 r 442
2005-05-28 20:50:22 C 14 02 17.15 +59 53 19.8 r 442
2005-05-28 20:52:51 C 14 02 17.18 +59 53 17.7 r 442
2005-05-30 21:55:17 C 13 56 55.82 +59 10 47.3 o 084
2005-05-30 21:57:04 C 13 56 55.66 +59 10 45.6 o 084
2005-05-30 21:58:50 C 13 56 55.46 +59 10 44.0 o 084
2005-05-30 22:00:36 C 13 56 55.27 +59 10 42.2 o 084
2005-06-02 23:07:35 C 13 49 55.43 +58 03 37.5 o A74
2005-06-02 23:32:25 C 13 49 53.13 +58 03 13.3 o A74
2005-06-02 23:55:42 C 13 49 51.01 +58 02 50.7 o A74
2005-06-03 21:27:48 C 13 48 00.69 +57 42 20.5 c 560
2005-06-03 21:30:04 C 13 48 00.49 +57 42 18.2 c 560
2005-06-03 21:32:21 C 13 48 00.31 +57 42 16.1 c 560
2005-06-03 21:50:54 C 13 47 58.39 +57 41 56.7 o A76
2005-06-03 22:08:55 C 13 47 56.90 +57 41 38.2 o A76
2005-06-03 22:26:56 C 13 47 55.24 +57 41 20.8 o A76
2005-06-06 01:56:00 C 13 43 52.93 +56 50 55.8 c I06
2005-06-06 02:09:23 C 13 43 51.86 +56 50 42.4 c I06
2005-06-06 02:23:20 C 13 43 50.76 +56 50 28.1 c I06
2005-06-06 20:37:56 C 13 42 31.85 +56 32 11.1 c A53
2005-06-06 20:41:05 C 13 42 31.61 +56 32 07.4 c A53
2005-06-06 20:45:18 C 13 42 31.32 +56 32 03.2 c A53
2005-06-06 20:49:31 C 13 42 31.04 +56 31 58.7 c A53
2005-06-08 20:08:27 C 13 39 22.25 +55 43 41.0 a 233
2005-06-08 20:16:24 C 13 39 21.60 +55 43 32.3 a 233
2005-06-08 20:24:30 C 13 39 21.10 +55 43 24.4 a 233
2005-06-08 23:01:31 C 13 39 10.91 +55 40 37.5 o A74
2005-06-08 23:37:52 C 13 39 08.54 +55 39 58.8 o A74
2005-06-09 00:06:06 C 13 39 06.73 +55 39 29.0 o A74
2005-06-09 05:33:07 C 13 38 46.70 +55 33 55.0 r H45
2005-06-09 05:41:49 C 13 38 46.15 +55 33 46.2 r H45
2005-06-09 05:45:22 C 13 38 45.90 +55 33 42.1 r H45
2005-06-09 05:49:51 C 13 38 45.62 +55 33 37.2 r H45
2005-06-09 05:51:51 C 13 38 45.48 +55 33 34.8 r H45
2005-06-11 23:00:25 C 13 35 07.50 +54 24 52.7 c A50
2005-06-11 23:01:01 C 13 35 07.47 +54 24 52.0 c A50
2005-06-11 23:01:39 C 13 35 07.42 +54 24 51.2 c A50
2005-06-11 23:02:15 C 13 35 07.42 +54 24 50.9 c A50
2005-06-11 23:02:50 C 13 35 07.41 +54 24 52.5 c A50
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)