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
2022-04-25 21:02:51 C 11 42 49.47 +69 33 49.5 V C40
2022-04-25 21:03:12 C 11 42 49.48 +69 33 48.8 V C40
2022-04-25 21:03:35 C 11 42 49.50 +69 33 48.3 V C40
2022-04-25 21:03:55 C 11 42 49.49 +69 33 47.6 V C40
2022-04-25 21:04:16 C 11 42 49.50 +69 33 47.1 V C40
2022-04-25 21:07:26 C 11 42 49.56 +69 33 41.6 V C40
2022-04-25 21:07:48 C 11 42 49.57 +69 33 41.0 V C40
2022-04-25 21:08:30 C 11 42 49.57 +69 33 39.7 V C40
2022-04-25 21:15:31 C 11 42 49.67 +69 33 27.8 V C40
2022-04-25 21:15:52 C 11 42 49.66 +69 33 27.1 V C40
2022-04-25 21:16:35 C 11 42 49.67 +69 33 26.0 V C40
2022-04-25 21:17:17 C 11 42 49.70 +69 33 24.8 V C40
2022-04-25 21:17:59 C 11 42 49.70 +69 33 23.4 V C40
2022-04-25 21:18:20 C 11 42 49.71 +69 33 22.9 V C40
2022-04-25 21:19:24 C 11 42 49.73 +69 33 21.1 V C40
2022-04-25 21:19:46 C 11 42 49.73 +69 33 20.5 V C40
2022-04-25 21:20:07 C 11 42 49.73 +69 33 19.9 V C40
2022-04-25 21:20:27 C 11 42 49.74 +69 33 19.4 V C40
2022-04-25 21:20:49 C 11 42 49.76 +69 33 18.6 V C40
2022-04-25 21:21:10 C 11 42 49.75 +69 33 18.1 V C40
2022-04-25 21:22:14 C 11 42 49.75 +69 33 16.3 V C40
2022-04-25 21:22:34 C 11 42 49.76 +69 33 15.7 V C40
2022-04-25 21:22:56 C 11 42 49.76 +69 33 15.0 V C40
2022-04-25 22:06:06 C 11 42 50.39 +69 32 00.9 V C40
2022-04-25 22:06:28 C 11 42 50.39 +69 32 00.2 V C40
2022-04-25 22:06:48 C 11 42 50.40 +69 31 59.6 V C40
2022-04-25 22:07:09 C 11 42 50.41 +69 31 59.1 V C40
2022-04-25 22:07:31 C 11 42 50.40 +69 31 58.4 V C40
2022-04-25 22:07:52 C 11 42 50.41 +69 31 57.9 V C40
2022-04-25 22:11:23 C 11 42 50.46 +69 31 51.8 V C40
2022-04-25 22:11:45 C 11 42 50.47 +69 31 51.2 V C40
2022-04-25 22:12:49 C 11 42 50.49 +69 31 49.4 V C40
2022-04-25 22:13:09 C 11 42 50.49 +69 31 48.7 V C40
2022-04-25 22:13:52 C 11 42 50.53 +69 31 47.5 V C40
2022-04-25 22:14:13 C 11 42 50.52 +69 31 47.0 V C40
2022-04-25 22:14:33 C 11 42 50.52 +69 31 46.2 V C40
2022-04-25 22:14:56 C 11 42 50.55 +69 31 45.6 V C40
2022-04-25 22:18:15 C 11 42 50.59 +69 31 39.9 V C40
2022-04-25 22:18:36 C 11 42 50.59 +69 31 39.3 V C40
2022-04-25 22:19:18 C 11 42 50.62 +69 31 38.1 V C40
2022-04-25 22:19:41 C 11 42 50.62 +69 31 37.4 V C40
2022-04-25 22:20:22 C 11 42 50.62 +69 31 36.2 V C40
2022-04-25 22:20:43 C 11 42 50.63 +69 31 35.7 V C40
2022-04-25 22:21:05 C 11 42 50.63 +69 31 35.1 V C40
2022-04-25 22:22:50 C 11 42 50.67 +69 31 32.0 V C40
2022-04-25 22:23:12 C 11 42 50.68 +69 31 31.4 V C40
2022-04-25 22:23:33 C 11 42 50.68 +69 31 30.8 V C40
2022-04-25 22:23:55 C 11 42 50.68 +69 31 30.2 V C40
2022-04-25 22:24:16 C 11 42 50.68 +69 31 29.6 V C40
2022-04-25 22:24:57 C 11 42 50.70 +69 31 28.4 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)