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
2002-05-20 20:13:03 C 12 39 19.01 +57 57 09.4 c 151
2002-05-20 20:20:10 C 12 39 18.86 +57 57 00.9 c 151
2002-05-20 23:06:16 C 12 39 15.59 +57 53 40.5 r 544
2002-05-20 23:11:16 C 12 39 15.51 +57 53 34.2 r 544
2002-05-20 23:16:16 C 12 39 15.42 +57 53 28.2 r 544
2002-05-20 23:21:15 C 12 39 15.37 +57 53 22.0 r 544
2002-05-20 23:26:15 C 12 39 15.23 +57 53 16.3 r 544
2002-05-20 23:31:16 C 12 39 15.18 +57 53 10.0 r 544
2002-05-20 23:36:16 C 12 39 15.08 +57 53 03.9 r 544
2002-05-21 20:29:17 C 12 38 59.61 +57 28 24.9 d 557
2002-05-21 20:45:14 C 12 38 59.35 +57 28 05.9 d 557
2002-05-21 21:10:43 C 12 38 58.92 +57 27 35.4 d 557
2002-05-21 21:49:27 C 12 38 58.38 +57 26 48.1 o 544
2002-05-21 21:54:27 C 12 38 58.30 +57 26 42.1 o 544
2002-05-21 22:04:28 C 12 38 58.16 +57 26 30.0 o 544
2002-05-21 22:09:27 C 12 38 58.09 +57 26 23.9 o 544
2002-05-21 22:14:27 C 12 38 58.01 +57 26 17.9 o 544
2002-05-21 23:17:19 C 12 38 56.96 +57 25 03.2 d 557
2002-05-22 00:33:20 C 12 38 55.94 +57 23 31.1 d 557
2002-05-22 01:30:23 C 12 38 55.25 +57 22 21.6 d 557
2002-05-22 21:16:06 C 12 38 44.28 +56 59 06.2 c 084
2002-05-24 21:55:39 C 12 38 26.63 +56 01 52.2 c 084
2002-05-24 22:28:35 C 12 38 26.39 +56 01 19.4 232
2002-05-24 22:42:48 C 12 38 26.39 +56 01 02.8 16.1 939
2002-05-24 22:48:25 C 12 38 26.35 +56 00 55.9 16.1 939
2002-05-24 22:54:45 C 12 38 26.21 +56 00 48.0 232
2002-05-24 22:56:53 C 12 38 26.28 +56 00 45.6 16.1 939
2002-05-24 23:19:05 C 12 38 26.11 +56 00 18.5 232
2002-05-25 00:04:05 C 12 38 25.69 +55 59 24.8 232
2002-05-25 22:38:13 C 12 38 23.28 +55 33 02.8 15.7 939
2002-05-25 22:46:37 C 12 38 23.23 +55 32 52.7 15.7 939
2002-05-25 22:55:11 C 12 38 23.18 +55 32 42.4 15.7 939
2002-05-26 22:37:39 C 12 38 23.59 +55 04 53.8 c 084
2002-05-28 11:40:00 C 12 38 30.61 +54 21 53.3 379
2002-05-28 11:42:13 C 12 38 30.62 +54 21 50.8 379
2002-05-28 11:46:41 C 12 38 30.59 +54 21 45.5 379
2002-05-28 11:48:54 C 12 38 30.64 +54 21 42.9 379
2002-05-28 11:53:05 C 12 38 30.63 +54 21 38.1 379
2002-05-30 03:56:14 C 12 38 45.66 +53 35 09.0 16.3 c 704
2002-05-30 04:16:13 C 12 38 45.69 +53 34 45.7 16.3 c 704
2002-05-30 04:35:40 C 12 38 45.76 +53 34 22.9 16.4 c 704
2002-05-30 04:55:15 C 12 38 45.80 +53 33 59.8 16.4 c 704
2002-05-30 05:15:15 C 12 38 45.88 +53 33 36.2 16.4 c 704
2002-05-30 22:00:45 C 12 38 54.62 +53 14 03.9 c 084
2002-06-01 23:08:45 C 12 39 27.26 +52 17 24.3 16.0 939
2002-06-01 23:17:19 C 12 39 27.35 +52 17 14.2 16.0 939
2002-06-01 23:25:54 C 12 39 27.45 +52 17 03.9 16.0 939
2002-06-03 12:25:25 C 12 39 59.40 +51 34 32.2 c 379
2002-06-03 12:27:57 C 12 39 59.34 +51 34 28.7 c 379
2002-06-03 12:30:03 C 12 39 59.43 +51 34 26.3 c 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)