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
2002-04-25 20:53:38 C 13 29 02.89 +69 57 19.9 c 198
2002-04-25 20:55:15 C 13 29 02.56 +69 57 18.0 c 198
2002-04-25 21:40:33 C 13 28 53.00 +69 56 26.2 c 198
2002-04-25 21:46:58 C 13 28 51.63 +69 56 18.8 c 198
2002-04-25 21:53:22 C 13 28 50.27 +69 56 11.1 c 198
2002-04-25 22:24:11 C 13 28 42.96 +69 55 31.2 c 084
2002-04-27 01:01:22 C 13 23 35.53 +69 24 16.5 c 084
2002-04-27 14:10:52 C 13 21 15.21 +69 08 58.0 355
2002-04-27 14:14:46 C 13 21 14.54 +69 08 53.0 355
2002-04-27 14:18:37 C 13 21 13.77 +69 08 48.5 355
2002-04-27 14:20:29 C 13 21 13.43 +69 08 45.9 355
2002-04-29 21:06:16 C 13 12 27.93 +68 03 27.3 d 557
2002-04-29 21:22:24 C 13 12 25.47 +68 03 07.7 d 557
2002-04-29 21:38:31 C 13 12 22.94 +68 02 48.6 d 557
2002-04-30 00:09:17 C 13 11 59.83 +67 59 39.3 c 084
2002-04-30 20:23:00 C 13 09 12.67 +67 35 29.5 c 157
2002-04-30 20:25:21 C 13 09 12.30 +67 35 26.7 c 157
2002-04-30 20:27:42 C 13 09 11.98 +67 35 23.9 c 157
2002-05-01 00:40:39 C 13 08 35.63 +67 30 14.2 d 557
2002-05-01 01:42:17 C 13 08 27.13 +67 28 57.6 d 557
2002-05-01 05:05:27 C 13 08 02.71 +67 25 03.5 15.2 c 704
2002-05-01 05:23:40 C 13 08 00.13 +67 24 41.7 15.4 c 704
2002-05-01 05:41:53 C 13 07 57.52 +67 24 19.8 15.5 c 704
2002-05-01 06:00:06 C 13 07 54.87 +67 23 58.1 15.5 c 704
2002-05-01 06:18:31 C 13 07 52.28 +67 23 35.6 15.5 c 704
2002-05-01 22:18:02 C 13 05 50.66 +67 04 12.7 d 557
2002-05-02 00:24:44 C 13 05 34.08 +67 01 36.8 d 557
2002-05-02 01:55:50 C 13 05 22.51 +66 59 43.1 d 557
2002-05-02 14:16:42 C 13 03 55.36 +66 44 57.7 379
2002-05-02 14:20:38 C 13 03 54.92 +66 44 53.0 379
2002-05-02 14:23:53 C 13 03 54.37 +66 44 48.9 379
2002-05-02 19:58:53 C 13 03 17.11 +66 37 59.3 d 557
2002-05-02 21:49:32 C 13 03 03.53 +66 35 46.0 d 557
2002-05-02 22:21:44 C 13 02 59.59 +66 35 06.7 d 557
2002-05-03 01:54:35 C 13 02 34.24 +66 30 42.4 d 557
2002-05-03 20:05:09 C 13 00 37.98 +66 08 47.8 d 557
2002-05-03 22:29:34 C 13 00 21.65 +66 05 52.6 d 557
2002-05-03 23:43:34 C 13 00 13.38 +66 04 21.3 d 557
2002-05-04 01:01:52 C 13 00 04.81 +66 02 43.7 d 557
2002-05-04 01:50:12 C 12 59 59.62 +66 01 43.0 d 557
2002-05-04 04:49:16 C 12 59 43.29 +65 58 17.7 15.0 c 704
2002-05-04 04:49:22 C 12 59 43.49 +65 58 17.1 15.5 c 704
2002-05-04 05:06:55 C 12 59 41.31 +65 57 56.3 15.2 c 704
2002-05-04 05:07:07 C 12 59 41.49 +65 57 55.6 15.6 c 704
2002-05-04 05:24:32 C 12 59 39.32 +65 57 34.7 15.1 c 704
2002-05-04 05:24:51 C 12 59 39.50 +65 57 34.2 15.6 c 704
2002-05-04 05:42:16 C 12 59 37.32 +65 57 13.4 14.7 c 704
2002-05-04 05:42:35 C 12 59 37.50 +65 57 12.7 15.5 c 704
2002-05-04 05:59:56 C 12 59 35.36 +65 56 51.6 15.4 c 704
2002-05-04 06:00:19 C 12 59 35.51 +65 56 51.0 15.5 c 704
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)