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
2022-06-19 18:33:34 C 12 35 48.57 +42 00 53.9 V C40
2022-06-19 18:34:37 C 12 35 48.63 +42 00 52.7 V C40
2022-06-19 18:36:02 C 12 35 48.69 +42 00 51.3 V C40
2022-06-19 18:41:45 C 12 35 48.98 +42 00 44.9 V C40
2022-06-19 18:43:52 C 12 35 49.08 +42 00 42.5 V C40
2022-06-19 18:44:14 C 12 35 49.10 +42 00 42.2 V C40
2022-06-19 18:50:35 C 12 35 49.43 +42 00 35.1 V C40
2022-06-19 18:50:55 C 12 35 49.44 +42 00 34.7 V C40
2022-06-19 18:55:30 C 12 35 49.68 +42 00 29.7 V C40
2022-06-19 18:57:37 C 12 35 49.78 +42 00 27.3 V C40
2022-06-19 18:57:59 C 12 35 49.80 +42 00 26.9 V C40
2022-06-19 19:00:07 C 12 35 49.91 +42 00 24.6 V C40
2022-06-19 19:01:52 C 12 35 50.00 +42 00 22.6 V C40
2022-06-19 19:09:17 C 12 35 50.36 +42 00 14.4 V C40
2022-06-19 19:11:22 C 12 35 50.47 +42 00 12.0 V C40
2022-06-19 19:12:56 C 12 35 50.55 +42 00 10.2 V C40
2022-06-19 19:13:58 C 12 35 50.61 +42 00 09.1 V C40
2022-06-19 19:16:33 C 12 35 50.73 +42 00 06.2 V C40
2022-06-19 19:20:10 C 12 35 50.92 +42 00 02.2 V C40
2022-06-19 19:21:12 C 12 35 50.97 +42 00 01.0 V C40
2022-06-19 19:24:19 C 12 35 51.12 +41 59 57.6 V C40
2022-06-19 19:25:52 C 12 35 51.20 +41 59 55.9 V C40
2022-06-19 19:28:29 C 12 35 51.33 +41 59 53.0 V C40
2022-06-19 19:29:30 C 12 35 51.39 +41 59 51.9 V C40
2022-06-19 19:30:01 C 12 35 51.41 +41 59 51.3 V C40
2022-06-19 19:32:38 C 12 35 51.55 +41 59 48.3 V C40
2022-06-19 19:33:09 C 12 35 51.56 +41 59 47.8 V C40
2022-06-19 20:45:31 C 12 35 55.531 +41 58 28.92 t A16
2022-06-19 21:05:15 C 12 35 56.530 +41 58 07.39 t A16
2022-06-19 21:26:00 C 12 35 57.583 +41 57 44.35 t A16
2022-06-20 04:52:58 C 12 36 21.150 +41 49 38.68 V 703
2022-06-20 05:01:18 C 12 36 21.589 +41 49 29.42 V 703
2022-06-20 05:09:37 C 12 36 21.992 +41 49 20.32 V 703
2022-06-20 05:17:56 C 12 36 22.410 +41 49 11.10 V 703
2022-06-20 18:40:01 C 12 37 05.09 +41 34 33.2 V C40
2022-06-20 18:46:01 C 12 37 05.40 +41 34 26.5 V C40
2022-06-20 19:00:26 C 12 37 06.13 +41 34 10.4 V C40
2022-06-20 19:07:58 C 12 37 06.51 +41 34 02.1 V C40
2022-06-20 19:09:20 C 12 37 06.58 +41 34 00.6 V C40
2022-06-20 19:10:42 C 12 37 06.65 +41 33 59.0 V C40
2022-06-20 19:14:07 C 12 37 06.83 +41 33 55.2 V C40
2022-06-20 19:16:52 C 12 37 06.97 +41 33 52.1 V C40
2022-06-20 19:19:36 C 12 37 07.11 +41 33 49.1 V C40
2022-06-20 19:23:43 C 12 37 07.32 +41 33 44.6 V C40
2022-06-20 19:36:08 C 12 37 07.95 +41 33 30.7 V C40
2022-06-20 19:38:53 C 12 37 08.10 +41 33 27.8 V C40
2022-06-20 19:40:55 C 12 37 08.21 +41 33 25.3 V C40
2022-06-20 19:42:17 C 12 37 08.27 +41 33 23.9 V C40
2022-06-20 19:47:47 C 12 37 08.56 +41 33 17.8 V C40
2022-06-20 19:56:00 C 12 37 08.97 +41 33 08.7 V C40
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)