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
2022-05-29 19:50:37 C 12 11 10.09 +51 23 24.2 V C40
2022-05-29 19:52:02 C 12 11 10.17 +51 23 22.5 V C40
2022-05-29 19:52:45 C 12 11 10.19 +51 23 21.7 V C40
2022-05-29 19:53:49 C 12 11 10.23 +51 23 20.3 V C40
2022-05-29 19:54:10 C 12 11 10.25 +51 23 19.9 V C40
2022-05-29 19:54:52 C 12 11 10.27 +51 23 19.2 V C40
2022-05-29 19:55:36 C 12 11 10.30 +51 23 18.2 V C40
2022-05-29 19:57:21 C 12 11 10.37 +51 23 16.1 V C40
2022-05-29 19:57:44 C 12 11 10.40 +51 23 15.7 V C40
2022-05-29 19:59:08 C 12 11 10.45 +51 23 14.1 V C40
2022-05-29 20:02:42 C 12 11 10.59 +51 23 09.8 V C40
2022-05-29 20:05:09 C 12 11 10.69 +51 23 06.9 V C40
2022-05-29 20:05:32 C 12 11 10.72 +51 23 06.6 V C40
2022-05-29 20:07:39 C 12 11 10.80 +51 23 04.0 V C40
2022-05-29 20:18:53 C 12 11 11.26 +51 22 50.8 V C40
2022-05-29 20:23:09 C 12 11 11.44 +51 22 45.8 V C40
2022-05-29 20:25:37 C 12 11 11.54 +51 22 42.8 V C40
2022-05-29 20:26:20 C 12 11 11.58 +51 22 42.0 V C40
2022-05-29 20:32:02 C 12 11 11.82 +51 22 35.1 V C40
2022-05-29 20:32:45 C 12 11 11.85 +51 22 34.4 V C40
2022-05-29 20:35:13 C 12 11 11.96 +51 22 31.4 V C40
2022-05-29 20:36:38 C 12 11 12.00 +51 22 29.8 V C40
2022-05-29 20:38:04 C 12 11 12.06 +51 22 28.1 V C40
2022-05-29 20:39:08 C 12 11 12.11 +51 22 26.8 V C40
2022-05-29 20:40:33 C 12 11 12.17 +51 22 25.1 V C40
2022-05-29 20:43:24 C 12 11 12.29 +51 22 21.8 V C40
2022-05-29 20:45:31 C 12 11 12.39 +51 22 19.3 V C40
2022-05-29 20:47:40 C 12 11 12.46 +51 22 16.8 V C40
2022-05-29 20:49:05 C 12 11 12.54 +51 22 15.1 V C40
2022-05-29 20:55:15 C 12 11 12.78 +51 22 07.7 V C40
2022-05-29 20:55:58 C 12 11 12.81 +51 22 06.9 V C40
2022-05-29 20:58:25 C 12 11 12.93 +51 22 04.0 V C40
2022-05-29 20:58:47 C 12 11 12.93 +51 22 03.6 V C40
2022-05-29 20:59:08 C 12 11 12.96 +51 22 03.1 V C40
2022-05-29 21:05:30 C 12 11 13.21 +51 21 55.6 V C40
2022-05-29 21:12:54 C 12 11 13.53 +51 21 46.8 V C40
2022-05-29 21:34:24 C 12 11 14.44 +51 21 21.3 V C40
2022-05-29 21:37:14 C 12 11 14.57 +51 21 18.1 V C40
2022-05-29 21:38:38 C 12 11 14.62 +51 21 16.4 V C40
2022-05-29 21:38:59 C 12 11 14.63 +51 21 16.0 V C40
2022-05-29 21:40:03 C 12 11 14.68 +51 21 14.6 V C40
2022-05-29 21:40:45 C 12 11 14.71 +51 21 13.8 V C40
2022-05-29 21:47:06 C 12 11 14.98 +51 21 06.4 V C40
2022-05-29 21:47:26 C 12 11 14.99 +51 21 06.0 V C40
2022-05-29 21:48:52 C 12 11 15.05 +51 21 04.2 V C40
2022-05-29 21:50:59 C 12 11 15.14 +51 21 01.7 V C40
2022-05-29 21:51:20 C 12 11 15.15 +51 21 01.2 V C40
2022-05-29 22:21:35 C 12 11 16.48 +51 20 25.6 V C40
2022-05-30 20:19:39 C 12 12 15.75 +50 55 06.3 V C40
2022-05-30 20:20:43 C 12 12 15.80 +50 55 05.0 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)