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
2022-05-24 21:29:39 C 12 06 02.81 +53 41 59.3 V C40
2022-05-24 21:30:02 C 12 06 02.83 +53 41 58.9 V C40
2022-05-24 21:37:35 C 12 06 03.13 +53 41 49.6 V C40
2022-05-24 21:38:38 C 12 06 03.17 +53 41 48.4 V C40
2022-05-24 21:40:24 C 12 06 03.25 +53 41 46.3 V C40
2022-05-24 21:40:45 C 12 06 03.26 +53 41 45.8 V C40
2022-05-24 21:41:05 C 12 06 03.27 +53 41 45.4 V C40
2022-05-24 21:41:26 C 12 06 03.28 +53 41 44.9 V C40
2022-05-24 21:41:49 C 12 06 03.30 +53 41 44.5 V C40
2022-05-24 21:42:09 C 12 06 03.32 +53 41 44.1 V C40
2022-05-24 21:43:12 C 12 06 03.35 +53 41 42.9 V C40
2022-05-24 21:43:33 C 12 06 03.38 +53 41 42.4 V C40
2022-05-24 21:44:53 C 12 06 03.42 +53 41 40.8 V C40
2022-05-24 21:45:13 C 12 06 03.45 +53 41 40.3 V C40
2022-05-24 21:45:35 C 12 06 03.46 +53 41 39.9 V C40
2022-05-24 21:45:56 C 12 06 03.47 +53 41 39.5 V C40
2022-05-24 21:47:00 C 12 06 03.51 +53 41 38.3 V C40
2022-05-24 21:47:20 C 12 06 03.52 +53 41 37.7 V C40
2022-05-24 21:48:03 C 12 06 03.55 +53 41 36.9 V C40
2022-05-24 21:48:46 C 12 06 03.58 +53 41 36.1 V C40
2022-05-24 21:49:07 C 12 06 03.59 +53 41 35.6 V C40
2022-05-24 21:49:27 C 12 06 03.62 +53 41 35.2 V C40
2022-05-24 21:50:53 C 12 06 03.67 +53 41 33.4 V C40
2022-05-24 21:51:35 C 12 06 03.69 +53 41 32.7 V C40
2022-05-24 21:52:39 C 12 06 03.73 +53 41 31.3 V C40
2022-05-24 21:53:01 C 12 06 03.76 +53 41 30.9 V C40
2022-05-24 21:53:21 C 12 06 03.76 +53 41 30.4 V C40
2022-05-24 21:54:46 C 12 06 03.83 +53 41 28.8 V C40
2022-05-24 21:55:08 C 12 06 03.84 +53 41 28.3 V C40
2022-05-24 21:56:53 C 12 06 03.92 +53 41 26.2 V C40
2022-05-24 21:57:15 C 12 06 03.93 +53 41 25.7 V C40
2022-05-24 21:58:18 C 12 06 03.97 +53 41 24.4 V C40
2022-05-24 21:59:43 C 12 06 04.02 +53 41 22.7 V C40
2022-05-24 22:00:46 C 12 06 04.06 +53 41 21.5 V C40
2022-05-24 22:01:06 C 12 06 04.07 +53 41 21.1 V C40
2022-05-24 22:01:50 C 12 06 04.11 +53 41 20.2 V C40
2022-05-24 22:02:10 C 12 06 04.12 +53 41 19.8 V C40
2022-05-24 22:02:32 C 12 06 04.13 +53 41 19.3 V C40
2022-05-24 22:04:39 C 12 06 04.22 +53 41 16.7 V C40
2022-05-24 22:07:24 C 12 06 04.34 +53 41 13.4 V C40
2022-05-24 22:07:45 C 12 06 04.34 +53 41 12.9 V C40
2022-05-24 22:08:05 C 12 06 04.36 +53 41 12.5 V C40
2022-05-24 22:08:28 C 12 06 04.38 +53 41 12.1 V C40
2022-05-24 22:08:49 C 12 06 04.40 +53 41 11.7 V C40
2022-05-24 22:10:12 C 12 06 04.44 +53 41 09.9 V C40
2022-05-24 22:10:55 C 12 06 04.47 +53 41 09.1 V C40
2022-05-24 22:11:38 C 12 06 04.51 +53 41 08.2 V C40
2022-05-24 22:13:02 C 12 06 04.56 +53 41 06.5 V C40
2022-05-24 22:15:30 C 12 06 04.67 +53 41 03.5 V C40
2022-05-24 22:16:13 C 12 06 04.70 +53 41 02.6 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)