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
2025-06-22 20:05:02 C 13 10 36.91 +46 11 07.9 X C40
2025-06-22 20:07:27 C 13 10 36.92 +46 11 05.0 X C40
2025-06-22 20:09:52 C 13 10 36.95 +46 11 02.1 X C40
2025-06-22 20:12:15 C 13 10 36.96 +46 10 59.2 X C40
2025-06-22 20:14:34 C 13 10 36.97 +46 10 56.6 X C40
2025-06-22 20:16:46 C 13 10 37.00 +46 10 54.0 X C40
2025-06-22 20:18:58 C 13 10 37.01 +46 10 51.3 X C40
2025-06-22 20:21:10 C 13 10 37.02 +46 10 48.7 X C40
2025-06-22 20:51:39 C 13 10 37.22 +46 10 12.2 X D04
2025-06-22 20:55:59 C 13 10 37.25 +46 10 07.2 X D04
2025-06-22 21:00:19 C 13 10 37.28 +46 10 02.8 X D04
2025-06-22 21:04:39 C 13 10 37.33 +46 09 57.0 X D04
2025-06-22 21:09:00 C 13 10 37.38 +46 09 52.3 X D04
2025-06-22 21:13:20 C 13 10 37.42 +46 09 46.9 X D04
2025-06-22 21:17:23 C 13 10 37.40 +46 09 42.0 X D04
2025-06-22 21:21:11 C 13 10 37.43 +46 09 37.7 X D04
2025-06-22 21:24:58 C 13 10 37.45 +46 09 33.3 X D04
2025-06-22 21:28:46 C 13 10 37.51 +46 09 28.2 X D04
2025-06-22 21:32:33 C 13 10 37.53 +46 09 24.4 X D04
2025-06-22 21:36:21 C 13 10 37.54 +46 09 19.8 X D04
2025-06-23 17:43:26 B 13 10 49.361 +45 46 08.87 W M73
2025-06-23 17:52:03 B 13 10 49.414 +45 45 58.64 W M73
2025-06-23 18:02:31 B 13 10 49.459 +45 45 46.30 W M73
2025-06-23 23:54:29 C 13 10 53.136 +45 38 49.16 Z C23
2025-06-24 00:29:30 C 13 10 53.431 +45 38 07.15 Z C23
2025-06-24 06:04:40 C 13 10 57.643 +45 31 50.84 V T08
2025-06-24 06:13:23 C 13 10 57.691 +45 31 40.69 V T08
2025-06-24 06:22:40 C 13 10 57.749 +45 31 29.75 V T08
2025-06-24 06:29:12 C 13 10 57.187 +45 31 15.85 V 703
2025-06-24 06:31:18 C 13 10 57.794 +45 31 19.67 V T08
2025-06-24 06:32:29 C 13 10 57.212 +45 31 12.04 V 703
2025-06-24 06:35:46 C 13 10 57.270 +45 31 07.97 V 703
2025-06-24 06:39:02 C 13 10 57.281 +45 31 03.83 V 703
2025-06-24 17:27:42 B 13 11 04.949 +45 18 35.10 W M73
2025-06-24 17:31:57 B 13 11 04.927 +45 18 30.38 W M73
2025-06-24 17:36:35 B 13 11 05.023 +45 18 24.70 W M73
2025-06-24 18:41:02 C 13 11 05.91 +45 17 05.4 X C40
2025-06-24 18:43:26 C 13 11 05.93 +45 17 02.6 X C40
2025-06-24 18:45:50 C 13 11 05.96 +45 16 59.8 X C40
2025-06-24 18:48:15 C 13 11 05.97 +45 16 56.9 X C40
2025-06-24 18:50:40 C 13 11 05.99 +45 16 54.1 X C40
2025-06-24 18:53:04 C 13 11 06.01 +45 16 51.3 X C40
2025-06-24 18:55:28 C 13 11 06.03 +45 16 48.4 X C40
2025-06-24 18:57:53 C 13 11 06.05 +45 16 45.6 X C40
2025-06-24 19:00:10 C 13 11 06.07 +45 16 42.8 X C40
2025-06-24 19:02:22 C 13 11 06.10 +45 16 40.3 X C40
2025-06-24 19:04:35 C 13 11 06.11 +45 16 37.7 X C40
2025-06-24 19:06:46 C 13 11 06.13 +45 16 35.1 X C40
2025-06-25 19:12:08 C 13 11 23.92 +44 48 33.3 X C40
2025-06-25 19:14:32 C 13 11 23.95 +44 48 30.4 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)