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
2005-04-28 08:24:32 C 16 20 07.63 +62 16 41.5 15.3 c 704
2005-04-28 14:04:03 C 16 18 55.31 +62 20 39.9 o 379
2005-04-28 14:05:41 C 16 18 54.97 +62 20 41.1 o 379
2005-04-28 14:07:21 C 16 18 54.59 +62 20 42.4 o 379
2005-04-28 14:08:59 C 16 18 54.22 +62 20 43.8 o 379
2005-04-28 14:10:39 C 16 18 53.81 +62 20 44.7 o 379
2005-04-28 14:12:18 C 16 18 53.50 +62 20 46.1 o 379
2005-04-28 14:13:56 C 16 18 53.07 +62 20 47.1 o 379
2005-04-28 20:34:23 C 16 17 30.82 +62 25 04.6 c 118
2005-04-28 20:38:43 C 16 17 29.88 +62 25 07.7 c 118
2005-04-28 20:43:05 C 16 17 28.92 +62 25 10.8 c 118
2005-04-28 20:47:26 C 16 17 27.93 +62 25 14.1 c 118
2005-04-28 20:56:10 C 16 17 26.08 +62 25 20.2 c 118
2005-04-30 21:15:25 C 16 06 48.47 +62 55 00.5 c 118
2005-04-30 21:21:55 C 16 06 46.97 +62 55 04.2 c 118
2005-04-30 21:26:17 C 16 06 45.97 +62 55 06.9 c 118
2005-04-30 21:32:49 C 16 06 44.47 +62 55 10.7 c 118
2005-04-30 21:43:42 C 16 06 42.05 +62 55 16.8 c 118
2005-05-02 23:41:57 C 15 55 30.57 +63 18 39.4 o 084
2005-05-02 23:44:07 C 15 55 30.06 +63 18 40.1 o 084
2005-05-03 14:28:05 C 15 52 12.50 +63 24 17.4 o 379
2005-05-03 14:34:30 C 15 52 11.02 +63 24 19.8 o 379
2005-05-03 14:38:49 C 15 52 10.00 +63 24 21.3 o 379
2005-05-03 14:40:57 C 15 52 09.46 +63 24 22.2 o 379
2005-05-03 14:45:16 C 15 52 08.50 +63 24 23.9 o 379
2005-05-03 14:47:24 C 15 52 07.96 +63 24 24.7 o 379
2005-05-04 04:30:21 C 15 49 03.47 +63 28 52.8 c 750
2005-05-04 04:44:47 C 15 49 00.15 +63 28 57.8 c 750
2005-05-07 09:43:05 C 15 31 44.05 +63 44 38.9 r H45
2005-05-07 09:48:50 C 15 31 42.76 +63 44 38.8 r H45
2005-05-07 09:50:49 C 15 31 42.26 +63 44 39.0 r H45
2005-05-07 09:52:24 C 15 31 41.96 +63 44 39.3 r H45
2005-05-07 09:54:18 C 15 31 41.55 +63 44 39.3 r H45
2005-05-07 15:36:02 C 15 30 27.28 +63 45 14.3 o 379
2005-05-07 15:37:52 C 15 30 26.85 +63 45 14.5 o 379
2005-05-07 15:39:41 C 15 30 26.46 +63 45 14.7 o 379
2005-05-07 15:46:56 C 15 30 24.74 +63 45 15.1 o 379
2005-05-07 15:50:35 C 15 30 23.90 +63 45 15.4 o 379
2005-05-09 22:49:33 C 15 18 23.61 +63 45 35.8 o 084
2005-05-09 22:51:42 C 15 18 23.13 +63 45 35.7 o 084
2005-05-10 08:40:20 C 15 16 16.01 +63 44 56.2 c H45
2005-05-10 08:41:46 C 15 16 15.66 +63 44 55.6 c H45
2005-05-10 08:43:43 C 15 16 15.23 +63 44 56.1 c H45
2005-05-10 08:46:20 C 15 16 14.66 +63 44 55.5 c H45
2005-05-10 08:47:40 C 15 16 14.40 +63 44 55.2 c H45
2005-05-10 14:45:55 C 15 14 59.34 +63 44 24.1 o 379
2005-05-10 14:48:03 C 15 14 58.89 +63 44 23.9 o 379
2005-05-10 14:52:22 C 15 14 57.88 +63 44 23.4 o 379
2005-05-10 14:56:40 C 15 14 56.94 +63 44 23.2 o 379
2005-05-10 15:00:57 C 15 14 55.99 +63 44 22.7 o 379
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)