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
2005-06-14 05:12:11 C 13 32 34.78 +53 26 36.1 16.7 c 704
2005-06-14 05:26:38 C 13 32 34.08 +53 26 21.3 16.9 c 704
2005-06-14 05:41:02 C 13 32 33.39 +53 26 04.8 16.9 c 704
2005-06-14 05:55:27 C 13 32 32.70 +53 25 48.7 16.8 c 704
2005-06-14 06:09:53 C 13 32 31.99 +53 25 32.4 16.9 c 704
2005-06-17 04:14:19 C 13 29 49.22 +52 08 26.9 c 750
2005-06-17 04:22:01 C 13 29 48.90 +52 08 18.9 c 750
2005-06-17 04:31:03 C 13 29 48.57 +52 08 08.7 c 750
2005-06-17 21:18:59 C 13 29 14.73 +51 49 26.9 r 157
2005-06-17 21:20:09 C 13 29 14.72 +51 49 25.5 r 157
2005-06-17 21:21:19 C 13 29 14.66 +51 49 24.1 r 157
2005-06-17 21:22:30 C 13 29 14.62 +51 49 22.8 r 157
2005-06-18 04:55:12 C 13 28 59.97 +51 40 56.8 c 750
2005-06-18 05:04:16 C 13 28 59.64 +51 40 46.3 c 750
2005-06-20 05:09:06 C 13 27 35.44 +50 46 48.2 o 448
2005-06-20 05:12:10 C 13 27 35.34 +50 46 44.8 o 448
2005-06-20 05:15:12 C 13 27 35.24 +50 46 41.2 o 448
2005-06-20 05:18:16 C 13 27 35.13 +50 46 37.8 o 448
2005-06-20 05:21:20 C 13 27 35.04 +50 46 34.3 o 448
2005-06-23 23:41:02 C 13 25 33.29 +49 03 24.9 o A32
2005-06-23 23:44:15 C 13 25 33.17 +49 03 21.2 o A32
2005-06-23 23:47:30 C 13 25 33.12 +49 03 16.6 o A32
2005-06-23 23:50:43 C 13 25 33.03 +49 03 12.8 o A32
2005-06-23 23:53:58 C 13 25 33.04 +49 03 09.1 o A32
2005-07-02 03:11:59 C 13 23 19.41 +45 14 22.6 r 750
2005-07-02 03:26:27 C 13 23 19.27 +45 14 05.2 r 750
2005-07-02 03:36:10 C 13 23 19.20 +45 13 53.6 r 750
2005-07-08 04:40:16 C 13 23 02.77 +42 18 44.1 r 750
2005-07-08 04:49:03 C 13 23 02.76 +42 18 33.0 r 750
2005-07-08 04:58:33 C 13 23 02.76 +42 18 21.4 r 750
2005-07-08 21:59:28 C 13 23 04.22 +41 57 30.8 r A35
2005-07-08 22:02:32 C 13 23 04.22 +41 57 26.9 r A35
2005-07-08 22:07:50 C 13 23 04.22 +41 57 20.4 r A35
2005-07-12 23:43:54 C 13 23 21.23 +39 56 40.4 c J93
2005-07-12 23:49:01 C 13 23 21.26 +39 56 34.7 c J93
2005-07-12 23:54:10 C 13 23 21.25 +39 56 28.0 c J93
2005-07-15 04:59:25 C 13 23 35.04 +38 50 02.9 16.8 c 704
2005-07-15 05:15:00 C 13 23 35.04 +38 49 42.7 16.9 c 704
2005-07-15 05:30:23 C 13 23 35.09 +38 49 22.6 16.6 c 704
2005-07-15 05:45:42 C 13 23 35.13 +38 49 03.2 16.5 c 704
2005-07-15 06:01:01 C 13 23 35.13 +38 48 43.3 16.5 c 704
2005-07-20 04:00:40 C 13 24 08.92 +36 18 15.2 r 750
2005-07-20 04:06:27 C 13 24 08.93 +36 18 07.6 r 750
2005-07-30 19:49:11 C 13 24 27.83 +30 35 07.7 16.0 o 160
2005-07-30 19:51:44 C 13 24 27.83 +30 35 04.1 15.8 o 160
2005-07-30 19:54:21 C 13 24 27.82 +30 35 00.3 16.5 o 160
2005-07-30 19:56:50 C 13 24 27.78 +30 34 56.8 15.8 o 160
2005-08-01 20:04:37 C 13 24 11.41 +29 26 47.2 r A30
2005-08-01 20:06:06 C 13 24 11.40 +29 26 45.1 r A30
2005-08-01 20:07:03 C 13 24 11.39 +29 26 43.7 r A30
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)