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
2014-04-09 10:29:15 C 19 12 23.89 +22 06 33.8 q H45
2014-04-09 10:30:52 C 19 12 24.01 +22 06 36.1 q H45
2014-04-17 14:25:13 C 19 28 08.168 +26 45 41.26 L F51
2014-04-17 14:44:39 C 19 28 09.652 +26 46 09.81 L F51
2014-04-17 14:54:23 C 19 28 10.394 +26 46 24.11 L F51
2014-05-17 09:07:18 C 20 28 46.42 +45 42 35.6 u H21
2014-05-17 09:09:45 C 20 28 46.66 +45 42 39.9 u H21
2014-05-17 09:12:44 C 20 28 46.94 +45 42 45.1 u H21
2014-05-17 09:14:37 C 20 28 47.13 +45 42 48.4 u H21
2014-05-17 09:16:47 C 20 28 47.34 +45 42 52.2 u H21
2014-05-17 09:18:41 C 20 28 47.52 +45 42 55.5 u H21
2014-05-17 09:20:51 C 20 28 47.74 +45 42 59.4 u H21
2014-05-20 21:25:56 C 20 37 37.28 +48 09 38.3 q 073
2014-05-20 21:36:49 C 20 37 38.48 +48 09 58.0 q 073
2014-05-20 21:46:05 C 20 37 39.49 +48 10 14.6 q 073
2014-05-20 21:58:28 C 20 37 40.83 +48 10 36.8 q 073
2014-05-20 22:08:04 C 20 37 41.89 +48 10 54.5 q 073
2014-05-20 22:18:54 C 20 37 42.97 +48 11 13.6 q 073
2014-05-20 22:28:12 C 20 37 44.05 +48 11 30.4 q 073
2014-05-20 22:39:00 C 20 37 45.35 +48 11 50.5 q 073
2014-05-20 22:49:50 C 20 37 46.41 +48 12 09.7 q 073
2014-05-20 22:59:07 C 20 37 47.43 +48 12 26.2 q 073
2014-05-20 23:09:56 C 20 37 48.52 +48 12 45.4 q 073
2014-05-20 23:20:47 C 20 37 49.62 +48 13 04.7 q 073
2014-05-20 23:30:03 C 20 37 50.66 +48 13 22.1 q 073
2014-05-26 20:43:09 C 20 54 52.41 +52 26 57.3 q 073
2014-05-26 21:13:26 C 20 54 56.43 +52 27 54.1 q 073
2014-05-26 21:30:27 C 20 54 58.73 +52 28 25.7 q 073
2014-05-26 22:15:40 C 20 55 04.66 +52 29 50.2 q 073
2014-05-26 22:45:15 C 20 55 08.57 +52 30 45.4 q 073
2014-05-26 23:00:46 C 20 55 10.57 +52 31 14.1 q 073
2014-05-26 23:16:15 C 20 55 12.63 +52 31 43.1 q 073
2014-05-26 23:45:41 C 20 55 16.42 +52 32 37.7 q 073
2014-05-27 00:01:09 C 20 55 18.48 +52 33 06.6 q 073
2014-05-27 00:15:31 C 20 55 20.35 +52 33 33.1 q 073
2014-06-08 20:37:34 C 21 52 39.02 +62 10 42.4 q 073
2014-06-08 21:06:59 C 21 52 46.91 +62 11 36.9 q 073
2014-06-08 21:38:07 C 21 52 55.03 +62 12 36.8 q 073
2014-06-08 22:09:14 C 21 53 03.31 +62 13 36.7 q 073
2014-06-08 22:40:14 C 21 53 11.33 +62 14 37.0 q 073
2014-06-08 23:24:06 C 21 53 22.93 +62 16 00.6 q 073
2014-06-08 23:54:05 C 21 53 30.68 +62 16 58.0 q 073
2014-06-09 00:25:04 C 21 53 38.76 +62 17 57.5 q 073
2014-06-09 20:18:09 C 21 59 06.88 +62 54 51.9 q L22
2014-06-09 20:24:43 C 21 59 08.73 +62 55 04.4 q L22
2014-06-09 20:25:49 C 21 59 09.03 +62 55 06.3 q L22
2014-06-09 20:26:55 C 21 59 09.35 +62 55 08.7 q L22
2014-06-09 20:28:01 C 21 59 09.64 +62 55 10.9 q L22
2014-06-09 20:46:58 C 21 59 14.99 +62 55 47.1 q 073
2014-06-09 21:18:11 C 21 59 23.65 +62 56 47.9 q 073
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)