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
2022-06-18 18:28:33 C 12 34 32.56 +42 27 14.9 V C40
2022-06-18 18:29:37 C 12 34 32.61 +42 27 13.6 V C40
2022-06-18 18:31:21 C 12 34 32.70 +42 27 11.8 V C40
2022-06-18 18:39:05 C 12 34 33.08 +42 27 03.2 V C40
2022-06-18 18:39:27 C 12 34 33.11 +42 27 02.8 V C40
2022-06-18 18:40:51 C 12 34 33.17 +42 27 01.2 V C40
2022-06-18 18:41:11 C 12 34 33.19 +42 27 00.9 V C40
2022-06-18 18:42:15 C 12 34 33.24 +42 26 59.7 V C40
2022-06-18 18:47:31 C 12 34 33.50 +42 26 53.9 V C40
2022-06-18 18:48:34 C 12 34 33.55 +42 26 52.6 V C40
2022-06-18 18:48:55 C 12 34 33.57 +42 26 52.3 V C40
2022-06-18 18:49:15 C 12 34 33.59 +42 26 51.8 V C40
2022-06-18 18:51:22 C 12 34 33.70 +42 26 49.6 V C40
2022-06-18 18:51:44 C 12 34 33.72 +42 26 49.1 V C40
2022-06-18 18:54:32 C 12 34 33.86 +42 26 46.1 V C40
2022-06-18 18:54:54 C 12 34 33.88 +42 26 45.7 V C40
2022-06-18 18:56:18 C 12 34 33.95 +42 26 44.0 V C40
2022-06-18 18:56:38 C 12 34 33.96 +42 26 43.6 V C40
2022-06-18 18:57:42 C 12 34 34.01 +42 26 42.4 V C40
2022-06-18 18:58:03 C 12 34 34.03 +42 26 42.2 V C40
2022-06-18 18:58:25 C 12 34 34.05 +42 26 41.7 V C40
2022-06-18 18:59:06 C 12 34 34.09 +42 26 40.9 V C40
2022-06-18 18:59:28 C 12 34 34.11 +42 26 40.5 V C40
2022-06-18 18:59:49 C 12 34 34.12 +42 26 40.2 V C40
2022-06-18 19:00:52 C 12 34 34.18 +42 26 39.0 V C40
2022-06-18 19:01:35 C 12 34 34.21 +42 26 38.1 V C40
2022-06-18 19:01:56 C 12 34 34.23 +42 26 37.9 V C40
2022-06-18 19:02:16 C 12 34 34.25 +42 26 37.5 V C40
2022-06-18 19:04:23 C 12 34 34.35 +42 26 35.1 V C40
2022-06-18 19:04:45 C 12 34 34.37 +42 26 34.6 V C40
2022-06-18 19:05:26 C 12 34 34.41 +42 26 33.9 V C40
2022-06-18 19:06:50 C 12 34 34.46 +42 26 32.5 V C40
2022-06-19 04:44:02 C 12 35 04.841 +42 16 03.61 U I41
2022-06-19 05:00:36 C 12 35 05.659 +42 15 45.22 U I41
2022-06-19 05:38:02 C 12 35 07.451 +42 15 03.28 V 703
2022-06-19 05:42:37 C 12 35 07.759 +42 14 58.42 U I41
2022-06-19 05:46:27 C 12 35 07.876 +42 14 53.77 V 703
2022-06-19 05:47:24 C 12 35 07.990 +42 14 53.02 U I41
2022-06-19 05:54:53 C 12 35 08.308 +42 14 44.59 V 703
2022-06-19 18:16:33 C 12 35 47.72 +42 01 12.9 V C40
2022-06-19 18:16:55 C 12 35 47.73 +42 01 12.4 V C40
2022-06-19 18:17:15 C 12 35 47.75 +42 01 12.0 V C40
2022-06-19 18:19:23 C 12 35 47.85 +42 01 09.7 V C40
2022-06-19 18:21:10 C 12 35 47.94 +42 01 07.7 V C40
2022-06-19 18:22:57 C 12 35 48.04 +42 01 05.7 V C40
2022-06-19 18:23:17 C 12 35 48.05 +42 01 05.3 V C40
2022-06-19 18:24:01 C 12 35 48.09 +42 01 04.5 V C40
2022-06-19 18:30:23 C 12 35 48.41 +42 00 57.4 V C40
2022-06-19 18:30:44 C 12 35 48.43 +42 00 57.1 V C40
2022-06-19 18:32:10 C 12 35 48.50 +42 00 55.6 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)