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
2022-05-28 19:58:11 C 12 10 06.71 +51 51 06.3 V C40
2022-05-28 19:59:13 C 12 10 06.75 +51 51 05.0 V C40
2022-05-28 19:59:45 C 12 10 06.76 +51 51 04.3 V C40
2022-05-28 20:00:16 C 12 10 06.78 +51 51 03.8 V C40
2022-05-28 20:08:02 C 12 10 07.11 +51 50 54.6 V C40
2022-05-28 20:08:33 C 12 10 07.13 +51 50 54.0 V C40
2022-05-28 20:14:15 C 12 10 07.36 +51 50 47.1 V C40
2022-05-28 20:17:21 C 12 10 07.48 +51 50 43.5 V C40
2022-05-28 20:19:58 C 12 10 07.60 +51 50 40.4 V C40
2022-05-28 20:24:06 C 12 10 07.77 +51 50 35.4 V C40
2022-05-28 20:29:19 C 12 10 07.98 +51 50 29.3 V C40
2022-05-28 20:30:52 C 12 10 08.04 +51 50 27.5 V C40
2022-05-28 20:31:24 C 12 10 08.06 +51 50 26.9 V C40
2022-05-28 20:31:56 C 12 10 08.08 +51 50 26.2 V C40
2022-05-28 20:32:58 C 12 10 08.13 +51 50 24.9 V C40
2022-05-28 20:33:29 C 12 10 08.15 +51 50 24.3 V C40
2022-05-28 20:36:35 C 12 10 08.27 +51 50 20.7 V C40
2022-05-28 20:37:06 C 12 10 08.31 +51 50 20.0 V C40
2022-05-28 20:38:07 C 12 10 08.34 +51 50 18.8 V C40
2022-05-28 20:39:10 C 12 10 08.38 +51 50 17.6 V C40
2022-05-28 20:40:43 C 12 10 08.45 +51 50 15.8 V C40
2022-05-28 20:41:15 C 12 10 08.46 +51 50 15.1 V C40
2022-05-28 20:41:46 C 12 10 08.49 +51 50 14.5 V C40
2022-05-28 20:45:55 C 12 10 08.66 +51 50 09.6 V C40
2022-05-28 20:49:01 C 12 10 08.79 +51 50 05.9 V C40
2022-05-28 20:51:06 C 12 10 08.87 +51 50 03.4 V C40
2022-05-28 20:52:39 C 12 10 08.95 +51 50 01.6 V C40
2022-05-28 20:53:42 C 12 10 08.98 +51 50 00.3 V C40
2022-05-28 20:58:20 C 12 10 09.17 +51 49 54.8 V C40
2022-05-28 21:06:46 C 12 10 09.53 +51 49 44.8 V C40
2022-05-28 21:08:49 C 12 10 09.61 +51 49 42.4 V C40
2022-05-28 21:12:59 C 12 10 09.79 +51 49 37.3 V C40
2022-05-28 21:14:31 C 12 10 09.84 +51 49 35.6 V C40
2022-05-28 21:17:39 C 12 10 09.97 +51 49 31.9 V C40
2022-05-28 21:19:42 C 12 10 10.07 +51 49 29.3 V C40
2022-05-28 21:21:16 C 12 10 10.13 +51 49 27.5 V C40
2022-05-28 21:24:53 C 12 10 10.28 +51 49 23.3 V C40
2022-05-28 21:25:56 C 12 10 10.33 +51 49 21.9 V C40
2022-05-28 21:26:59 C 12 10 10.36 +51 49 20.8 V C40
2022-05-28 21:28:31 C 12 10 10.42 +51 49 18.9 V C40
2022-05-28 21:29:02 C 12 10 10.45 +51 49 18.3 V C40
2022-05-28 21:29:33 C 12 10 10.48 +51 49 17.7 V C40
2022-05-28 21:32:10 C 12 10 10.59 +51 49 14.6 V C40
2022-05-29 19:28:50 C 12 11 09.20 +51 23 49.7 V C40
2022-05-29 19:30:17 C 12 11 09.26 +51 23 48.2 V C40
2022-05-29 19:31:41 C 12 11 09.31 +51 23 46.4 V C40
2022-05-29 19:32:02 C 12 11 09.33 +51 23 46.1 V C40
2022-05-29 19:32:25 C 12 11 09.34 +51 23 45.7 V C40
2022-05-29 19:33:29 C 12 11 09.39 +51 23 44.3 V C40
2022-05-29 19:49:24 C 12 11 10.05 +51 23 25.6 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)