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
2025-06-02 22:37:05 C 13 15 44.369 +55 11 16.58 Z C23
2025-06-02 23:36:15 C 13 15 42.038 +55 10 10.60 Z C23
2025-06-03 02:26:21 C 13 15 36.38 +55 07 10.6 V W46
2025-06-03 02:38:51 C 13 15 35.84 +55 06 56.6 V W46
2025-06-03 02:51:35 C 13 15 35.31 +55 06 42.6 V W46
2025-06-03 08:04:53 C 13 15 23.930 +55 01 02.17 V T08
2025-06-03 08:09:31 C 13 15 23.748 +55 00 57.13 V T08
2025-06-03 08:17:35 C 13 15 23.402 +55 00 48.06 V T08
2025-06-03 08:33:31 C 13 15 22.740 +55 00 30.24 V T08
2025-06-03 17:40:26 B 13 15 04.015 +54 50 29.54 W M73
2025-06-03 17:55:59 B 13 15 03.350 +54 50 12.19 W M73
2025-06-03 18:11:37 B 13 15 02.729 +54 49 54.70 W M73
2025-06-03 20:07:31 C 13 14 58.69 +54 47 41.6 X C40
2025-06-03 20:09:44 C 13 14 58.61 +54 47 39.1 X C40
2025-06-03 20:11:57 C 13 14 58.52 +54 47 36.5 X C40
2025-06-03 20:14:11 C 13 14 58.43 +54 47 34.2 X C40
2025-06-03 20:16:26 C 13 14 58.35 +54 47 31.6 X C40
2025-06-03 20:23:05 C 13 14 58.10 +54 47 24.3 X C40
2025-06-03 20:25:13 C 13 14 58.03 +54 47 21.7 X C40
2025-06-03 20:27:15 C 13 14 57.94 +54 47 19.5 X C40
2025-06-03 20:29:17 C 13 14 57.86 +54 47 17.2 X C40
2025-06-03 20:31:20 C 13 14 57.77 +54 47 14.8 X C40
2025-06-03 22:43:02 C 13 14 53.647 +54 44 55.36 V R17
2025-06-03 23:02:54 C 13 14 52.901 +54 44 33.50 V R17
2025-06-03 23:22:56 C 13 14 52.082 +54 44 10.64 V R17
2025-06-03 23:43:22 C 13 14 51.276 +54 43 47.78 V R17
2025-06-04 06:57:45 C 13 14 36.751 +54 35 46.75 V 703
2025-06-04 07:00:45 C 13 14 36.654 +54 35 43.37 V 703
2025-06-04 07:03:46 C 13 14 36.553 +54 35 40.06 V 703
2025-06-04 07:06:46 C 13 14 36.442 +54 35 36.82 V 703
2025-06-04 19:01:41 C 13 14 14.61 +54 22 27.6 X C40
2025-06-04 19:03:31 C 13 14 14.51 +54 22 25.7 X C40
2025-06-04 19:05:22 C 13 14 14.43 +54 22 23.6 X C40
2025-06-04 19:07:13 C 13 14 14.38 +54 22 21.7 X C40
2025-06-04 19:09:03 C 13 14 14.30 +54 22 19.6 X C40
2025-06-04 19:10:54 C 13 14 14.23 +54 22 17.5 X C40
2025-06-04 19:12:44 C 13 14 14.16 +54 22 15.5 X C40
2025-06-04 19:14:35 C 13 14 14.11 +54 22 13.4 X C40
2025-06-04 19:16:25 C 13 14 14.07 +54 22 11.3 X C40
2025-06-04 19:18:10 C 13 14 13.99 +54 22 09.5 X C40
2025-06-04 19:19:50 C 13 14 13.92 +54 22 07.6 X C40
2025-06-04 19:21:29 C 13 14 13.87 +54 22 05.5 X C40
2025-06-05 07:58:45 C 13 13 51.211 +54 08 13.78 V T05
2025-06-05 08:03:27 C 13 13 51.041 +54 08 08.41 V T05
2025-06-05 08:14:01 C 13 13 50.678 +54 07 56.60 V T05
2025-06-05 08:30:02 C 13 13 50.114 +54 07 38.64 V T05
2025-06-05 20:10:05 C 13 13 30.37 +53 54 36.6 X C40
2025-06-05 20:12:17 C 13 13 30.30 +53 54 34.0 X C40
2025-06-05 20:14:30 C 13 13 30.25 +53 54 31.5 X C40
2025-06-05 20:16:43 C 13 13 30.16 +53 54 29.1 X 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)