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
2022-06-06 19:08:15 C 12 20 02.86 +47 45 21.1 V C40
2022-06-06 19:08:57 C 12 20 02.89 +47 45 20.3 V C40
2022-06-06 19:09:19 C 12 20 02.90 +47 45 19.8 V C40
2022-06-06 19:09:40 C 12 20 02.92 +47 45 19.4 V C40
2022-06-06 19:11:47 C 12 20 03.02 +47 45 17.1 V C40
2022-06-06 19:12:29 C 12 20 03.04 +47 45 16.2 V C40
2022-06-06 19:14:57 C 12 20 03.16 +47 45 13.4 V C40
2022-06-06 19:19:11 C 12 20 03.35 +47 45 08.6 V C40
2022-06-06 19:19:31 C 12 20 03.37 +47 45 08.2 V C40
2022-06-06 19:19:52 C 12 20 03.38 +47 45 07.7 V C40
2022-06-06 19:20:35 C 12 20 03.42 +47 45 06.9 V C40
2022-06-06 19:20:57 C 12 20 03.43 +47 45 06.6 V C40
2022-06-06 19:21:18 C 12 20 03.45 +47 45 06.1 V C40
2022-06-06 19:23:45 C 12 20 03.55 +47 45 03.3 V C40
2022-06-06 19:34:01 C 12 20 04.02 +47 44 51.7 V C40
2022-06-06 19:34:46 C 12 20 04.05 +47 44 50.8 V C40
2022-06-06 19:36:04 C 12 20 04.11 +47 44 49.3 V C40
2022-06-06 19:36:27 C 12 20 04.14 +47 44 48.8 V C40
2022-06-06 19:38:08 C 12 20 04.20 +47 44 46.9 V C40
2022-06-06 19:39:48 C 12 20 04.28 +47 44 45.0 V C40
2022-06-06 19:41:52 C 12 20 04.38 +47 44 42.6 V C40
2022-06-06 19:43:11 C 12 20 04.44 +47 44 41.2 V C40
2022-06-06 19:43:56 C 12 20 04.47 +47 44 40.4 V C40
2022-06-06 19:44:40 C 12 20 04.50 +47 44 39.5 V C40
2022-06-06 21:08:49 C 12 20 08.82 +47 43 05.0 V C23
2022-06-06 21:16:50 C 12 20 09.11 +47 42 55.6 V C23
2022-06-06 21:30:23 C 12 20 09.73 +47 42 39.9 V C23
2022-06-07 18:03:55 C 12 21 09.67 +47 19 38.0 V C40
2022-06-07 18:08:43 C 12 21 09.89 +47 19 32.6 V C40
2022-06-07 18:18:19 C 12 21 10.32 +47 19 21.8 V C40
2022-06-07 18:20:21 C 12 21 10.42 +47 19 19.4 V C40
2022-06-07 18:21:03 C 12 21 10.44 +47 19 18.7 V C40
2022-06-07 18:23:48 C 12 21 10.57 +47 19 15.5 V C40
2022-06-07 18:24:28 C 12 21 10.61 +47 19 14.7 V C40
2022-06-07 18:25:10 C 12 21 10.64 +47 19 13.9 V C40
2022-06-07 18:25:50 C 12 21 10.67 +47 19 13.2 V C40
2022-06-07 18:27:12 C 12 21 10.73 +47 19 11.6 V C40
2022-06-07 18:27:55 C 12 21 10.76 +47 19 10.9 V C40
2022-06-07 18:29:17 C 12 21 10.82 +47 19 09.4 V C40
2022-06-07 18:31:20 C 12 21 10.91 +47 19 07.1 V C40
2022-06-07 18:34:44 C 12 21 11.07 +47 19 03.1 V C40
2022-06-07 18:36:49 C 12 21 11.17 +47 19 00.8 V C40
2022-06-07 18:37:29 C 12 21 11.20 +47 19 00.0 V C40
2022-06-07 18:43:39 C 12 21 11.47 +47 18 53.1 V C40
2022-06-07 18:46:07 C 12 21 11.58 +47 18 50.3 V C40
2022-06-07 18:47:28 C 12 21 11.64 +47 18 48.6 V C40
2022-06-07 18:48:10 C 12 21 11.68 +47 18 47.9 V C40
2022-06-07 18:48:50 C 12 21 11.71 +47 18 47.2 V C40
2022-06-07 18:55:42 C 12 21 12.02 +47 18 39.3 V C40
2022-06-07 18:57:04 C 12 21 12.09 +47 18 37.7 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)