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
2011-06-25 21:31:34 C 15 43 06.02 +78 35 23.5 c A24
2011-06-25 21:32:36 C 15 43 05.46 +78 35 24.1 c A24
2011-06-25 22:33:36 C 15 42 20.92 +78 36 08.1 c A24
2011-06-25 22:34:41 C 15 42 20.30 +78 36 08.8 c A24
2011-06-26 21:43:13 C 15 25 26.75 +78 51 38.4 c A24
2011-06-26 21:44:15 C 15 25 26.17 +78 51 38.9 c A24
2011-06-26 22:43:02 C 15 24 40.43 +78 52 12.3 c A24
2011-06-26 22:44:04 C 15 24 39.84 +78 52 12.7 c A24
2011-06-27 21:51:51 C 15 06 42.88 +79 04 06.5 c A24
2011-06-27 21:52:53 C 15 06 42.23 +79 04 06.7 c A24
2011-06-27 22:51:47 C 15 05 53.89 +79 04 30.0 c A24
2011-06-27 22:52:49 C 15 05 53.25 +79 04 30.2 c A24
2011-06-28 03:35:13 C 15 02 10.51 +79 06 32.6 o 719
2011-06-28 03:38:55 C 15 02 07.45 +79 06 34.2 o 719
2011-06-28 03:47:27 C 15 02 00.32 +79 06 37.6 o 719
2011-06-30 03:30:41 C 14 21 54.80 +79 16 18.9 o 719
2011-06-30 03:44:24 C 14 21 42.40 +79 16 18.9 o 719
2011-06-30 04:00:27 C 14 21 28.09 +79 16 18.5 o 719
2011-07-06 03:42:21 C 12 19 04.84 +77 40 08.3 o 719
2011-07-06 03:56:52 C 12 18 53.47 +77 39 48.0 o 719
2013-04-17 17:33:20 C 05 26 10.24 +29 51 10.3 r 168
2013-04-17 17:34:50 C 05 26 10.67 +29 51 12.9 r 168
2013-04-17 17:36:15 C 05 26 11.14 +29 51 16.4 r 168
2013-04-17 18:16:15 C 05 26 23.45 +29 52 32.2 r 168
2013-04-17 18:17:25 C 05 26 23.81 +29 52 34.2 r 168
2013-04-18 20:19:01 C 05 34 26.27 +30 41 37.1 q A78
2013-04-18 20:28:04 C 05 34 29.05 +30 41 53.8 q A78
2013-04-18 20:34:36 C 05 34 31.08 +30 42 05.8 q A78
2013-04-18 20:40:11 C 05 34 32.80 +30 42 15.7 q A78
2013-04-18 20:45:25 C 05 34 34.45 +30 42 25.2 q A78
2013-04-24 18:30:29 C 06 18 25.95 +34 28 51.4 q C73
2013-04-24 18:31:45 C 06 18 26.34 +34 28 52.8 q C73
2013-04-24 18:32:54 C 06 18 26.67 +34 28 54.6 q C73
2013-04-24 18:34:03 C 06 18 26.88 +34 28 57.6 q C73
2013-04-24 18:35:13 C 06 18 27.41 +34 28 57.9 q C73
2013-04-24 18:36:21 C 06 18 27.75 +34 28 59.6 q C73
2013-04-24 18:37:30 C 06 18 28.05 +34 29 00.7 q C73
2013-04-24 18:38:40 C 06 18 28.49 +34 29 02.0 q C73
2013-04-24 18:39:49 C 06 18 28.79 +34 29 03.9 q C73
2013-04-24 18:40:59 C 06 18 29.18 +34 29 04.5 q C73
2013-04-24 18:42:08 C 06 18 29.51 +34 29 09.5 q C73
2013-04-24 18:43:18 C 06 18 29.85 +34 29 07.9 q C73
2013-04-24 18:44:28 C 06 18 30.13 +34 29 11.6 q C73
2013-04-24 18:45:37 C 06 18 30.57 +34 29 11.6 q C73
2013-04-24 18:46:46 C 06 18 30.90 +34 29 13.0 q C73
2013-04-24 18:47:56 C 06 18 31.22 +34 29 15.0 q C73
2013-04-24 18:49:05 C 06 18 31.75 +34 29 13.2 q C73
2013-04-29 03:53:45 C 06 50 29.00 +36 31 26.7 u G96
2013-04-29 04:00:27 C 06 50 31.02 +36 31 33.1 u G96
2013-04-29 04:07:13 C 06 50 33.03 +36 31 39.6 u G96
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)