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
2016-06-09 05:34:16 C 11 07 00.48 +38 14 12.2 q 703
2016-06-16 22:21:31 C 11 29 13.84 +35 40 15.4 o Z22
2016-06-16 22:33:36 C 11 29 15.24 +35 40 05.4 o Z22
2016-06-19 03:08:40 C 11 35 11.76 +34 55 31.0 q H45
2016-06-19 03:10:25 C 11 35 11.97 +34 55 29.6 q H45
2016-06-19 03:11:53 C 11 35 12.13 +34 55 28.4 q H45
2016-06-19 03:13:15 C 11 35 12.29 +34 55 27.0 q H45
2016-06-19 03:14:35 C 11 35 12.44 +34 55 25.7 q H45
2016-06-19 03:16:00 C 11 35 12.57 +34 55 24.7 q H45
2016-06-22 06:33:20 C 11 43 28.42 +33 51 09.9 L T05
2016-06-22 06:38:14 C 11 43 28.97 +33 51 05.5 L T05
2016-06-22 06:58:54 C 11 43 31.12 +33 50 47.1 L T05
2016-06-22 07:15:26 C 11 43 32.89 +33 50 33.5 L T05
2016-06-25 03:42:59 C 11 50 50.37 +32 51 32.5 q W19
2016-06-25 03:45:34 C 11 50 50.60 +32 51 30.3 q W19
2016-06-25 03:49:26 C 11 50 51.02 +32 51 27.7 q W19
2016-06-25 03:52:02 C 11 50 51.28 +32 51 24.6 q W19
2016-06-25 03:55:47 C 11 50 51.69 +32 51 21.5 q W19
2016-06-25 03:58:22 C 11 50 51.94 +32 51 19.1 q W19
2016-06-25 04:05:13 C 11 50 52.66 +32 51 13.2 q W19
2016-06-25 04:09:25 C 11 50 53.05 +32 51 08.8 q W19
2016-06-25 04:12:00 C 11 50 53.35 +32 51 07.2 q W19
2016-06-25 04:16:20 C 11 50 53.78 +32 51 03.3 q W19
2016-06-25 04:18:56 C 11 50 54.07 +32 51 01.2 q W19
2016-06-26 06:38:14 C 11 53 39.36 +32 28 20.5 L T05
2016-06-26 06:55:46 C 11 53 41.13 +32 28 05.1 L T05
2016-06-26 07:13:16 C 11 53 42.94 +32 27 49.6 L T05
2016-06-26 07:48:39 C 11 53 46.56 +32 27 18.1 L T05
2016-07-03 02:27:11 C 12 10 16.01 +30 05 16.1 q H45
2016-07-03 02:28:41 C 12 10 16.14 +30 05 14.8 q H45
2016-07-03 02:30:36 C 12 10 16.34 +30 05 13.0 q H45
2016-07-03 02:32:06 C 12 10 16.48 +30 05 11.6 q H45
2016-07-03 02:33:29 C 12 10 16.61 +30 05 10.5 q H45
2016-07-03 02:34:48 C 12 10 16.73 +30 05 09.3 q H45
2016-07-11 20:11:27 C 12 30 31.87 +26 59 06.4 S B38
2016-07-11 20:17:35 C 12 30 32.46 +26 59 01.0 S B38
2016-07-11 20:24:55 C 12 30 33.16 +26 58 54.1 S B38
2016-07-12 04:36:59 C 12 31 19.58 +26 51 35.1 q 703
2016-07-12 04:43:32 C 12 31 20.19 +26 51 29.1 q 703
2016-07-12 04:50:04 C 12 31 20.79 +26 51 23.3 q 703
2016-07-12 04:56:36 C 12 31 21.40 +26 51 17.5 q 703
2016-07-14 21:02:21 C 12 37 22.61 +25 53 46.1 o Z22
2016-07-14 21:12:38 C 12 37 23.53 +25 53 37.1 o Z22
2016-07-14 21:23:57 C 12 37 24.62 +25 53 25.9 o Z22
2016-07-26 21:06:47 C 13 03 48.65 +21 31 08.8 o Z22
2016-07-26 21:10:28 C 13 03 48.95 +21 31 04.5 o Z22
2016-07-26 21:14:06 C 13 03 49.26 +21 31 01.7 o Z22
2016-07-26 21:29:14 C 13 03 50.68 +21 30 47.5 o Z22
2016-07-26 21:33:10 C 13 03 50.99 +21 30 43.5 o Z22
2016-07-26 21:36:59 C 13 03 51.31 +21 30 40.4 o Z22
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)