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
2016-04-07 03:22:45 C 04 47 21.89 +33 44 32.6 q H45
2016-04-07 03:23:48 C 04 47 22.23 +33 44 35.7 q H45
2016-04-07 03:24:50 C 04 47 22.64 +33 44 38.3 q H45
2016-04-07 03:25:58 C 04 47 22.98 +33 44 41.3 q H45
2016-04-09 05:32:32 C 05 04 43.60 +36 02 01.1 L T05
2016-04-09 05:44:39 C 05 04 47.78 +36 02 32.2 L T05
2016-04-09 06:05:29 C 05 04 55.06 +36 03 25.4 L T05
2016-04-09 06:30:24 C 05 05 03.66 +36 04 29.7 L T05
2016-04-20 05:43:22 C 06 39 18.28 +44 23 37.6 L T05
2016-04-20 06:00:36 C 06 39 24.28 +44 23 57.0 L T05
2016-04-20 06:27:50 C 06 39 33.82 +44 24 28.3 L T05
2016-04-20 06:45:13 C 06 39 39.89 +44 24 48.0 L T05
2016-04-26 01:42:55 C 07 27 11.32 +46 20 58.0 q H45
2016-04-26 01:43:48 C 07 27 11.62 +46 20 58.6 q H45
2016-04-26 01:44:45 C 07 27 11.93 +46 20 58.9 q H45
2016-04-26 01:46:05 C 07 27 12.35 +46 20 59.7 q H45
2016-04-26 01:47:15 C 07 27 12.74 +46 21 00.3 q H45
2016-04-26 01:48:38 C 07 27 13.17 +46 21 01.0 q H45
2016-04-26 20:15:51 C 07 33 13.59 +46 29 59.0 q G34
2016-04-26 20:20:06 C 07 33 14.98 +46 30 00.6 q G34
2016-04-26 20:24:20 C 07 33 16.33 +46 30 02.8 q G34
2016-04-27 21:10:10 C 07 41 12.04 +46 40 06.7 u 209
2016-04-27 21:18:14 C 07 41 14.61 +46 40 09.5 u 209
2016-04-28 00:30:04 C 07 42 15.70 +46 41 22.1 q I15
2016-04-28 00:38:51 C 07 42 18.44 +46 41 25.0 q I15
2016-04-28 00:47:39 C 07 42 21.19 +46 41 27.8 q I15
2016-04-28 02:21:28 C 07 42 50.76 +46 42 01.5 q H45
2016-04-28 02:22:18 C 07 42 51.02 +46 42 01.8 q H45
2016-04-28 02:23:31 C 07 42 51.40 +46 42 02.3 q H45
2016-04-28 02:24:30 C 07 42 51.69 +46 42 02.5 q H45
2016-04-28 02:25:33 C 07 42 52.05 +46 42 02.7 q H45
2016-04-28 02:26:58 C 07 42 52.47 +46 42 03.1 q H45
2016-05-02 20:24:46 C 08 17 08.92 +46 59 36.8 q 006
2016-05-02 20:30:49 C 08 17 10.64 +46 59 36.9 q 006
2016-05-02 20:34:50 C 08 17 11.77 +46 59 36.4 q 006
2016-05-02 20:39:58 C 08 17 13.21 +46 59 36.1 q 006
2016-05-03 22:08:49 C 08 24 23.63 +46 58 18.9 S K14
2016-05-03 22:18:59 C 08 24 26.44 +46 58 17.6 S K14
2016-05-04 05:47:45 C 08 26 31.23 +46 57 46.2 L T05
2016-05-04 05:52:00 C 08 26 32.37 +46 57 45.9 L T05
2016-05-04 06:11:45 C 08 26 37.70 +46 57 42.9 L T05
2016-05-04 06:25:02 C 08 26 41.32 +46 57 41.8 L T05
2016-05-06 01:47:02 C 08 38 24.05 +46 51 03.5 q H45
2016-05-06 01:48:14 C 08 38 24.37 +46 51 03.2 q H45
2016-05-06 01:49:54 C 08 38 24.81 +46 51 03.1 q H45
2016-05-06 01:50:59 C 08 38 25.08 +46 51 02.8 q H45
2016-05-06 01:52:17 C 08 38 25.41 +46 51 02.4 q H45
2016-05-06 01:53:37 C 08 38 25.77 +46 51 02.1 q H45
2016-05-06 21:28:46 C 08 43 32.84 +46 46 30.9 q 168
2016-05-06 21:32:16 C 08 43 33.75 +46 46 30.0 q 168
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)