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
2022-05-09 21:37:39 C 11 52 24.61 +61 12 58.7 V C40
2022-05-09 21:38:20 C 11 52 24.62 +61 12 57.7 V C40
2022-05-09 21:41:31 C 11 52 24.73 +61 12 53.4 V C40
2022-05-09 21:41:53 C 11 52 24.73 +61 12 52.8 V C40
2022-05-09 21:42:14 C 11 52 24.75 +61 12 52.4 V C40
2022-05-09 21:43:18 C 11 52 24.77 +61 12 51.0 V C40
2022-05-09 21:44:01 C 11 52 24.80 +61 12 50.0 V C40
2022-05-09 21:44:21 C 11 52 24.81 +61 12 49.5 V C40
2022-05-09 21:44:42 C 11 52 24.81 +61 12 49.0 V C40
2022-05-09 21:47:53 C 11 52 24.91 +61 12 44.6 V C40
2022-05-09 21:53:30 C 11 52 25.07 +61 12 36.9 V C40
2022-05-09 21:54:13 C 11 52 25.10 +61 12 35.8 V C40
2022-05-09 21:54:57 C 11 52 25.11 +61 12 34.8 V C40
2022-05-09 21:55:17 C 11 52 25.12 +61 12 34.4 V C40
2022-05-09 21:55:40 C 11 52 25.14 +61 12 33.9 V C40
2022-05-09 21:58:28 C 11 52 25.23 +61 12 29.9 V C40
2022-05-09 21:58:50 C 11 52 25.24 +61 12 29.5 V C40
2022-05-09 21:59:32 C 11 52 25.26 +61 12 28.5 V C40
2022-05-09 22:02:42 C 11 52 25.36 +61 12 24.1 V C40
2022-05-09 22:05:12 C 11 52 25.42 +61 12 20.7 V C40
2022-05-09 22:05:32 C 11 52 25.43 +61 12 20.2 V C40
2022-05-09 22:16:24 C 11 52 25.76 +61 12 05.3 V C40
2022-05-09 23:57:19 C 11 52 29.23 +61 09 50.7 q M16
2022-05-10 00:19:33 C 11 52 29.90 +61 09 19.9 q M16
2022-05-10 00:41:47 C 11 52 30.56 +61 08 49.0 q M16
2022-05-10 04:43:07 C 11 52 40.080 +61 03 35.21 U I41
2022-05-10 04:45:50 C 11 52 40.150 +61 03 31.50 U I41
2022-05-10 06:20:47 C 11 52 42.452 +61 01 22.73 V V00
2022-05-10 06:28:02 C 11 52 42.654 +61 01 12.50 V V00
2022-05-10 06:35:16 C 11 52 42.841 +61 01 02.64 V V00
2022-05-10 06:42:28 C 11 52 43.039 +61 00 52.70 V V00
2022-05-10 06:46:16 C 11 52 43.289 +61 00 48.38 U I41
2022-05-10 06:47:44 C 11 52 43.330 +61 00 46.40 U I41
2022-05-10 07:19:33 C 11 52 44.201 +61 00 02.70 U I41
2022-05-10 20:41:33 C 11 53 11.68 +60 42 11.9 V C40
2022-05-10 20:41:43 C 11 53 11.67 +60 42 11.7 V C40
2022-05-10 20:42:50 C 11 53 11.72 +60 42 10.2 V C40
2022-05-10 20:43:47 C 11 53 11.73 +60 42 08.8 V C40
2022-05-10 20:43:58 C 11 53 11.74 +60 42 08.6 V C40
2022-05-10 20:44:08 C 11 53 11.76 +60 42 08.4 V C40
2022-05-10 20:44:19 C 11 53 11.76 +60 42 08.2 V C40
2022-05-10 20:44:31 C 11 53 11.77 +60 42 07.9 V C40
2022-05-10 20:44:43 C 11 53 11.76 +60 42 07.7 V C40
2022-05-10 20:45:27 C 11 53 11.78 +60 42 06.6 V C40
2022-05-10 20:46:22 C 11 53 11.81 +60 42 05.4 V C40
2022-05-10 20:46:33 C 11 53 11.81 +60 42 05.2 V C40
2022-05-10 20:46:45 C 11 53 11.82 +60 42 04.9 V C40
2022-05-10 20:47:18 C 11 53 11.84 +60 42 04.1 V C40
2022-05-10 20:47:30 C 11 53 11.85 +60 42 03.9 V C40
2022-05-10 20:47:42 C 11 53 11.84 +60 42 03.6 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)