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
2025-07-05 18:44:35 C 13 15 49.06 +40 07 07.6 X C40
2025-07-05 18:47:00 C 13 15 49.10 +40 07 04.7 X C40
2025-07-05 18:49:25 C 13 15 49.16 +40 07 01.7 X C40
2025-07-05 18:51:50 C 13 15 49.20 +40 06 58.9 X C40
2025-07-05 18:54:08 C 13 15 49.25 +40 06 56.1 X C40
2025-07-05 18:56:21 C 13 15 49.30 +40 06 53.5 X C40
2025-07-05 18:58:33 C 13 15 49.36 +40 06 50.6 X C40
2025-07-05 19:00:46 C 13 15 49.39 +40 06 48.0 X C40
2025-07-05 21:15:08 C 13 15 52.25 +40 04 05.7 X D04
2025-07-05 21:23:16 C 13 15 52.48 +40 03 55.2 X D04
2025-07-05 21:25:58 C 13 15 52.53 +40 03 52.3 X D04
2025-07-05 21:28:41 C 13 15 52.59 +40 03 48.7 X D04
2025-07-05 21:31:23 C 13 15 52.66 +40 03 46.0 X D04
2025-07-05 21:34:05 C 13 15 52.73 +40 03 42.8 X D04
2025-07-05 21:39:30 C 13 15 52.88 +40 03 35.4 X D04
2025-07-05 21:44:55 C 13 15 53.00 +40 03 28.9 X D04
2025-07-06 18:18:23 C 13 16 22.07 +39 39 10.0 X C40
2025-07-06 18:20:47 C 13 16 22.12 +39 39 07.1 X C40
2025-07-06 18:23:11 C 13 16 22.17 +39 39 04.2 X C40
2025-07-06 18:25:34 C 13 16 22.22 +39 39 01.2 X C40
2025-07-06 18:27:57 C 13 16 22.29 +39 38 58.4 X C40
2025-07-06 18:30:21 C 13 16 22.32 +39 38 55.5 X C40
2025-07-06 18:32:44 C 13 16 22.38 +39 38 52.8 X C40
2025-07-06 18:35:08 C 13 16 22.42 +39 38 49.8 X C40
2025-07-06 18:37:26 C 13 16 22.47 +39 38 46.9 X C40
2025-07-06 18:39:39 C 13 16 22.51 +39 38 44.2 X C40
2025-07-06 18:41:52 C 13 16 22.57 +39 38 41.6 X C40
2025-07-06 18:44:05 C 13 16 22.62 +39 38 38.9 X C40
2025-07-07 06:17:30 C 13 16 39.262 +39 25 00.91 V T05
2025-07-07 06:22:17 C 13 16 39.360 +39 24 55.19 V T05
2025-07-07 06:30:16 C 13 16 39.530 +39 24 45.86 V T05
2025-07-07 06:46:51 C 13 16 39.854 +39 24 25.67 V T05
2025-07-07 18:15:54 C 13 16 56.52 +39 10 40.1 X C40
2025-07-07 18:18:19 C 13 16 56.53 +39 10 37.8 X C40
2025-07-07 18:20:44 C 13 16 56.63 +39 10 34.5 X C40
2025-07-07 18:23:07 C 13 16 56.65 +39 10 31.2 X C40
2025-07-07 18:25:32 C 13 16 56.72 +39 10 28.3 X C40
2025-07-07 18:27:57 C 13 16 56.78 +39 10 25.5 X C40
2025-07-07 18:30:21 C 13 16 56.84 +39 10 22.6 X C40
2025-07-07 18:32:46 C 13 16 56.89 +39 10 19.8 X C40
2025-07-07 18:35:05 C 13 16 56.93 +39 10 16.9 X C40
2025-07-07 18:37:17 C 13 16 56.99 +39 10 14.2 X C40
2025-07-07 18:39:30 C 13 16 57.02 +39 10 11.4 X C40
2025-07-07 18:41:43 C 13 16 57.08 +39 10 09.3 X C40
2025-07-07 21:33:17 C 13 17 01.291 +39 06 48.85 V R17
2025-07-07 21:53:38 C 13 17 01.718 +39 06 24.30 V R17
2025-07-07 22:03:34 C 13 17 01.89 +39 06 09.0 X Z03
2025-07-07 22:14:00 C 13 17 02.150 +39 05 59.71 V R17
2025-07-07 22:37:44 C 13 17 02.67 +39 05 27.5 X Z03
2025-07-07 22:40:15 C 13 17 02.714 +39 05 27.82 V R17
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)