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
2022-07-20 19:12:19 C 13 18 10.97 +28 24 53.0 V C40
2022-07-20 19:13:01 C 13 18 11.02 +28 24 52.3 V C40
2022-07-20 19:14:46 C 13 18 11.12 +28 24 50.3 V C40
2022-07-20 19:16:54 C 13 18 11.24 +28 24 47.8 V C40
2022-07-20 19:17:16 C 13 18 11.26 +28 24 47.4 V C40
2022-07-20 19:21:10 C 13 18 11.49 +28 24 43.1 V C40
2022-07-20 19:21:51 C 13 18 11.54 +28 24 42.3 V C40
2022-07-20 19:24:19 C 13 18 11.68 +28 24 39.5 V C40
2022-07-21 06:58:32 C 13 18 53.242 +28 11 47.94 V T05
2022-07-21 07:03:06 C 13 18 53.518 +28 11 42.68 V T05
2022-07-21 07:10:57 C 13 18 53.952 +28 11 33.79 V T05
2022-07-21 07:25:57 C 13 18 54.823 +28 11 16.84 V T05
2022-07-21 19:28:22 C 13 19 38.19 +27 57 42.4 V C40
2022-07-21 19:41:21 C 13 19 38.95 +27 57 27.6 V C40
2022-07-21 19:43:25 C 13 19 39.07 +27 57 25.2 V C40
2022-07-21 19:53:00 C 13 19 39.64 +27 57 14.3 V C40
2022-07-21 19:54:22 C 13 19 39.71 +27 57 12.8 V C40
2022-07-21 19:55:44 C 13 19 39.79 +27 57 11.2 V C40
2022-07-21 19:58:29 C 13 19 39.96 +27 57 08.1 V C40
2022-07-21 19:59:51 C 13 19 40.04 +27 57 06.5 V C40
2022-07-21 20:03:16 C 13 19 40.24 +27 57 02.6 V C40
2022-07-21 20:04:39 C 13 19 40.32 +27 57 01.1 V C40
2022-07-21 20:05:21 C 13 19 40.37 +27 57 00.3 V C40
2022-07-21 20:07:23 C 13 19 40.49 +27 56 58.0 V C40
2022-07-21 20:08:45 C 13 19 40.57 +27 56 56.4 V C40
2022-07-21 20:10:07 C 13 19 40.65 +27 56 54.8 V C40
2022-07-21 20:13:33 C 13 19 40.86 +27 56 51.0 V C40
2022-07-21 20:21:06 C 13 19 41.31 +27 56 42.4 V C40
2022-07-21 20:29:18 C 13 19 41.81 +27 56 33.0 V C40
2022-07-21 20:30:00 C 13 19 41.85 +27 56 32.3 V C40
2022-07-22 07:07:53 C 13 20 20.122 +27 44 42.40 V T05
2022-07-22 07:12:27 C 13 20 20.376 +27 44 36.96 V T05
2022-07-22 07:20:16 C 13 20 20.827 +27 44 28.32 V T05
2022-07-22 07:37:53 C 13 20 21.866 +27 44 08.05 V T05
2022-07-22 18:54:02 C 13 21 02.55 +27 31 24.0 V C40
2022-07-22 18:55:43 C 13 21 02.65 +27 31 22.0 V C40
2022-07-22 19:16:14 C 13 21 03.87 +27 30 58.7 V C40
2022-07-22 19:24:57 C 13 21 04.38 +27 30 48.7 V C40
2022-07-22 19:36:09 C 13 21 05.05 +27 30 36.0 V C40
2022-07-22 20:11:15 C 13 21 07.15 +27 29 55.9 V C40
2022-07-22 20:26:07 C 13 21 08.04 +27 29 39.0 V C40
2022-07-23 07:30:19 C 13 21 47.892 +27 17 16.84 V T08
2022-07-23 07:38:17 C 13 21 48.355 +27 17 07.80 V T08
2022-07-23 07:43:00 C 13 21 48.629 +27 17 02.54 V T08
2022-07-23 08:09:49 C 13 21 50.203 +27 16 31.73 V T08
2022-07-23 17:57:54 C 13 22 25.82 +27 05 25.7 V C40
2022-07-23 18:02:00 C 13 22 26.06 +27 05 20.9 V C40
2022-07-23 18:04:03 C 13 22 26.18 +27 05 18.6 V C40
2022-07-23 18:09:32 C 13 22 26.50 +27 05 12.5 V C40
2022-07-23 18:13:39 C 13 22 26.75 +27 05 07.7 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)