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
2016-05-06 22:04:31 C 08 43 42.14 +46 46 21.7 q 168
2016-05-06 22:09:21 C 08 43 43.38 +46 46 20.3 q 168
2016-05-07 05:55:50 C 08 45 43.61 +46 44 40.0 L T05
2016-05-07 06:07:15 C 08 45 46.48 +46 44 36.7 L T05
2016-05-07 06:21:45 C 08 45 50.16 +46 44 32.7 L T05
2016-05-07 06:31:38 C 08 45 52.64 +46 44 30.0 L T05
2016-05-07 21:42:27 C 08 49 44.38 +46 40 06.7 q 168
2016-05-07 21:46:01 C 08 49 45.30 +46 40 05.4 q 168
2016-05-08 21:19:01 C 08 55 37.50 +46 32 49.9 q 168
2016-05-08 21:23:56 C 08 55 38.71 +46 32 48.2 q 168
2016-05-08 21:59:36 C 08 55 47.57 +46 32 35.8 q 168
2016-05-08 22:04:26 C 08 55 48.76 +46 32 34.1 q 168
2016-05-09 04:15:56 C 08 57 19.71 +46 30 40.5 q 703
2016-05-09 04:22:28 C 08 57 21.28 +46 30 38.4 q 703
2016-05-09 04:28:56 C 08 57 22.83 +46 30 35.9 q 703
2016-05-09 04:35:28 C 08 57 24.40 +46 30 33.5 q 703
2016-05-10 18:52:06 C 09 06 34.65 +46 16 10.8 q 168
2016-05-10 18:55:51 C 09 06 35.52 +46 16 09.2 q 168
2016-05-10 19:41:36 C 09 06 46.25 +46 15 49.7 q 168
2016-05-10 19:45:56 C 09 06 47.29 +46 15 47.8 q 168
2016-05-13 02:08:36 C 09 19 11.10 +45 51 55.1 q H45
2016-05-13 02:09:50 C 09 19 11.36 +45 51 54.5 q H45
2016-05-13 02:11:03 C 09 19 11.62 +45 51 54.0 q H45
2016-05-13 02:12:50 C 09 19 12.01 +45 51 53.1 q H45
2016-05-13 02:14:00 C 09 19 12.26 +45 51 52.6 q H45
2016-05-13 02:15:16 C 09 19 12.54 +45 51 51.9 q H45
2016-05-14 21:08:30 C 09 28 29.62 +45 30 14.1 q 006
2016-05-14 21:15:06 C 09 28 30.97 +45 30 10.3 q 006
2016-05-14 21:20:45 C 09 28 32.16 +45 30 07.5 q 006
2016-05-14 21:25:46 C 09 28 33.25 +45 30 05.4 q 006
2016-05-15 20:43:44 C 09 33 25.67 +45 17 31.0 q K14
2016-05-15 21:17:19 C 09 33 32.53 +45 17 12.0 q K14
2016-05-17 21:35:02 C 09 43 16.42 +44 49 22.3 u 209
2016-05-20 21:44:00 C 09 56 57.60 +44 04 15.5 q 006
2016-05-20 21:48:58 C 09 56 58.53 +44 04 12.0 q 006
2016-05-20 21:53:58 C 09 56 59.43 +44 04 08.5 q 006
2016-05-20 21:58:58 C 09 57 00.37 +44 04 05.2 q 006
2016-05-20 22:04:20 C 09 57 01.33 +44 04 01.1 q 006
2016-05-21 22:28:44 C 10 01 26.11 +43 47 53.6 q 006
2016-05-21 22:34:07 C 10 01 27.14 +43 47 50.1 q 006
2016-05-21 22:40:50 C 10 01 28.27 +43 47 46.4 q 006
2016-05-22 03:10:07 C 10 02 16.47 +43 44 48.7 q H45
2016-05-22 03:11:36 C 10 02 16.74 +43 44 47.7 q H45
2016-05-22 03:14:30 C 10 02 17.26 +43 44 45.7 q H45
2016-05-22 03:17:26 C 10 02 17.76 +43 44 43.6 q H45
2016-05-22 03:18:38 C 10 02 17.97 +43 44 42.8 q H45
2016-05-22 03:20:07 C 10 02 18.25 +43 44 41.8 q H45
2016-05-23 02:52:03 C 10 06 26.72 +43 28 44.7 q H45
2016-05-23 02:53:27 C 10 06 26.96 +43 28 43.8 q H45
2016-05-23 02:54:50 C 10 06 27.20 +43 28 42.9 q 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)