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
2005-05-20 20:45:48 C 14 28 35.87 +62 13 21.5 c 565
2005-05-20 20:49:45 C 14 28 35.25 +62 13 18.6 c 565
2005-05-20 20:52:54 C 14 28 34.70 +62 13 16.8 c 565
2005-05-20 20:57:33 C 14 28 33.31 +62 13 10.5 o 084
2005-05-20 20:58:04 C 14 28 33.78 +62 13 13.8 c 565
2005-05-20 20:59:40 C 14 28 32.99 +62 13 09.2 o 084
2005-05-20 21:02:10 C 14 28 32.56 +62 13 07.7 o 084
2005-05-21 20:51:55 C 14 24 47.81 +61 58 27.6 o A76
2005-05-21 21:06:06 C 14 24 45.50 +61 58 18.6 o A76
2005-05-21 21:17:09 C 14 24 43.93 +61 58 13.1 c 157
2005-05-21 21:18:19 C 14 24 43.74 +61 58 12.1 c 157
2005-05-21 21:19:29 C 14 24 43.62 +61 58 11.2 c 157
2005-05-21 21:20:39 C 14 24 43.31 +61 58 10.8 c 157
2005-05-21 21:21:22 C 14 24 43.07 +61 58 08.9 o A76
2005-05-21 21:29:58 C 14 24 41.50 +61 57 59.8 o 084
2005-05-21 21:32:04 C 14 24 41.16 +61 57 58.4 o 084
2005-05-22 22:32:56 C 14 20 53.96 +61 41 34.4 o 084
2005-05-22 22:35:03 C 14 20 53.63 +61 41 33.3 o 084
2005-05-23 05:11:25 C 14 19 56.21 +61 37 12.1 c 699
2005-05-23 05:31:10 C 14 19 53.13 +61 36 58.7 c 699
2005-05-23 05:52:30 C 14 19 49.82 +61 36 44.1 c 699
2005-05-23 06:12:16 C 14 19 46.78 +61 36 30.6 c 699
2005-05-24 05:00:10 C 14 16 31.06 +61 20 35.3 c 699
2005-05-24 05:16:54 C 14 16 28.64 +61 20 23.4 c 699
2005-05-24 05:33:38 C 14 16 26.03 +61 20 11.5 c 699
2005-05-24 05:50:22 C 14 16 23.63 +61 19 59.7 c 699
2005-05-25 13:21:19 C 14 12 05.19 +60 56 50.4 o 379
2005-05-25 13:22:58 C 14 12 04.97 +60 56 49.5 o 379
2005-05-25 13:24:36 C 14 12 04.80 +60 56 48.1 o 379
2005-05-25 13:26:16 C 14 12 04.56 +60 56 47.2 o 379
2005-05-25 22:26:11 C 14 10 53.03 +60 49 49.2 o 084
2005-05-25 22:28:18 C 14 10 52.72 +60 49 47.3 o 084
2005-05-26 06:49:52 C 14 09 47.28 +60 43 26.6 c H45
2005-05-26 06:55:55 C 14 09 46.39 +60 43 22.0 c H45
2005-05-26 07:01:10 C 14 09 45.72 +60 43 17.7 c H45
2005-05-26 07:03:04 C 14 09 45.49 +60 43 16.2 c H45
2005-05-26 07:08:07 C 14 09 44.79 +60 43 11.5 c H45
2005-05-26 12:14:00 C 14 09 07.14 +60 39 17.7 o 379
2005-05-26 12:15:59 C 14 09 06.91 +60 39 16.1 o 379
2005-05-26 12:17:59 C 14 09 06.64 +60 39 14.2 o 379
2005-05-26 12:21:56 C 14 09 06.12 +60 39 11.4 o 379
2005-05-26 12:25:55 C 14 09 05.59 +60 39 08.2 o 379
2005-05-27 20:49:19 C 14 05 05.61 +60 13 12.3 c A30
2005-05-27 20:50:10 C 14 05 05.42 +60 13 11.9 c A30
2005-05-27 20:51:19 C 14 05 05.27 +60 13 10.8 c A30
2005-05-27 20:52:27 C 14 05 05.10 +60 13 10.8 c A30
2005-05-27 20:53:35 C 14 05 04.98 +60 13 09.4 c A30
2005-05-27 21:52:20 C 14 04 57.44 +60 12 19.4 d 048
2005-05-27 21:52:56 C 14 04 57.35 +60 12 18.8 d 048
2005-05-27 21:53:30 C 14 04 57.27 +60 12 18.5 d 048
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)