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
2022-04-23 00:21:14 C 11 41 14.44 +71 32 51.7 V C40
2022-04-23 00:21:56 C 11 41 14.46 +71 32 50.3 V C40
2022-04-23 00:22:18 C 11 41 14.45 +71 32 49.7 V C40
2022-04-23 00:22:39 C 11 41 14.45 +71 32 49.1 V C40
2022-04-23 00:22:59 C 11 41 14.47 +71 32 48.4 V C40
2022-04-23 00:23:22 C 11 41 14.46 +71 32 47.8 V C40
2022-04-23 00:23:43 C 11 41 14.49 +71 32 47.0 V C40
2022-04-23 00:24:03 C 11 41 14.48 +71 32 46.4 V C40
2022-04-23 00:24:25 C 11 41 14.50 +71 32 45.8 V C40
2022-04-23 00:24:46 C 11 41 14.51 +71 32 45.1 V C40
2022-04-23 00:32:23 C 11 41 14.68 +71 32 30.9 V C40
2022-04-23 00:32:44 C 11 41 14.69 +71 32 30.4 V C40
2022-04-23 00:33:06 C 11 41 14.67 +71 32 29.7 V C40
2022-04-23 00:33:47 C 11 41 14.70 +71 32 28.4 V C40
2022-04-23 00:34:09 C 11 41 14.69 +71 32 27.7 V C40
2022-04-23 00:34:30 C 11 41 14.70 +71 32 27.1 V C40
2022-04-23 00:34:50 C 11 41 14.71 +71 32 26.4 V C40
2022-04-23 00:35:11 C 11 41 14.71 +71 32 25.8 V C40
2022-04-23 00:35:34 C 11 41 14.72 +71 32 25.0 V C40
2022-04-23 00:36:17 C 11 41 14.73 +71 32 23.7 V C40
2022-04-23 00:36:38 C 11 41 14.76 +71 32 23.0 V C40
2022-04-23 00:36:59 C 11 41 14.77 +71 32 22.5 V C40
2022-04-23 00:37:21 C 11 41 14.76 +71 32 21.8 V C40
2022-04-23 00:37:41 C 11 41 14.78 +71 32 21.1 V C40
2022-04-23 00:38:02 C 11 41 14.78 +71 32 20.5 V C40
2022-04-23 00:39:06 C 11 41 14.82 +71 32 18.6 V C40
2022-04-24 19:45:08 C 11 42 15.22 +70 16 50.3 V C40
2022-04-24 19:46:12 C 11 42 15.21 +70 16 48.4 V C40
2022-04-24 19:46:33 C 11 42 15.21 +70 16 47.8 V C40
2022-04-24 19:46:55 C 11 42 15.21 +70 16 47.2 V C40
2022-04-24 19:49:02 C 11 42 15.25 +70 16 43.4 V C40
2022-04-24 19:49:23 C 11 42 15.26 +70 16 42.9 V C40
2022-04-24 19:49:45 C 11 42 15.26 +70 16 42.3 V C40
2022-04-24 19:50:27 C 11 42 15.25 +70 16 41.1 V C40
2022-04-24 19:50:49 C 11 42 15.27 +70 16 40.4 V C40
2022-04-24 19:51:31 C 11 42 15.27 +70 16 39.2 V C40
2022-04-24 19:52:14 C 11 42 15.27 +70 16 38.0 V C40
2022-04-24 19:52:56 C 11 42 15.29 +70 16 36.7 V C40
2022-04-24 19:53:17 C 11 42 15.27 +70 16 36.2 V C40
2022-04-24 19:53:59 C 11 42 15.29 +70 16 34.9 V C40
2022-04-24 19:54:20 C 11 42 15.28 +70 16 34.3 V C40
2022-04-24 19:54:41 C 11 42 15.31 +70 16 33.7 V C40
2022-04-24 19:55:03 C 11 42 15.31 +70 16 33.1 V C40
2022-04-24 19:55:24 C 11 42 15.32 +70 16 32.4 V C40
2022-04-24 20:01:13 C 11 42 15.37 +70 16 22.4 V C40
2022-04-24 20:01:33 C 11 42 15.38 +70 16 21.7 V C40
2022-04-24 20:01:54 C 11 42 15.37 +70 16 21.1 V C40
2022-04-24 20:02:36 C 11 42 15.39 +70 16 19.9 V C40
2022-04-24 20:02:59 C 11 42 15.40 +70 16 19.3 V C40
2022-04-24 20:03:20 C 11 42 15.41 +70 16 18.8 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)