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
2002-05-04 22:24:19 C 12 57 57.69 +65 36 48.2 c 084
2002-05-05 04:56:36 C 12 57 21.40 +65 29 01.6 14.8 c 704
2002-05-05 05:14:42 C 12 57 19.52 +65 28 39.5 15.6 c 704
2002-05-05 05:32:38 C 12 57 17.63 +65 28 17.8 15.3 c 704
2002-05-05 05:51:00 C 12 57 15.74 +65 27 55.3 15.4 c 704
2002-05-05 06:09:31 C 12 57 13.80 +65 27 32.4 15.4 c 704
2002-05-06 23:32:16 C 12 53 37.57 +64 37 08.8 c 084
2002-05-07 22:05:39 C 12 51 53.54 +64 09 51.9 d 557
2002-05-07 22:50:21 C 12 51 49.92 +64 08 56.7 d 557
2002-05-07 23:35:05 C 12 51 46.35 +64 08 01.3 d 557
2002-05-08 00:18:57 C 12 51 42.90 +64 07 06.7 d 557
2002-05-08 01:08:04 C 12 51 39.09 +64 06 05.3 d 557
2002-05-08 01:52:22 C 12 51 35.74 +64 05 09.7 d 557
2002-05-08 11:20:28 C 12 50 57.35 +63 53 51.4 379
2002-05-08 12:42:25 C 12 50 50.87 +63 52 12.8 379
2002-05-08 12:44:35 C 12 50 50.71 +63 52 10.1 379
2002-05-08 12:47:19 C 12 50 50.44 +63 52 07.0 379
2002-05-08 21:19:15 C 12 50 15.06 +63 41 41.7 d 557
2002-05-08 21:25:16 C 12 50 14.76 +63 41 35.8 c 198
2002-05-08 21:27:23 C 12 50 14.55 +63 41 32.3 c 198
2002-05-08 21:29:30 C 12 50 14.37 +63 41 29.0 c 198
2002-05-08 22:00:44 C 12 50 11.93 +63 40 50.9 d 557
2002-05-08 22:45:22 C 12 50 08.59 +63 39 56.1 d 557
2002-05-08 23:30:02 C 12 50 05.31 +63 39 00.9 d 557
2002-05-09 00:18:07 C 12 50 01.82 +63 38 01.0 d 557
2002-05-09 01:02:49 C 12 49 58.69 +63 37 05.1 d 557
2002-05-09 01:48:53 C 12 49 55.51 +63 36 07.3 d 557
2002-05-09 20:01:48 C 12 48 47.08 +63 14 10.1 d 557
2002-05-09 21:02:26 C 12 48 42.88 +63 12 56.9 d 557
2002-05-09 21:59:50 C 12 48 38.95 +63 11 46.7 d 557
2002-05-09 23:00:24 C 12 48 34.85 +63 10 32.1 d 557
2002-05-09 23:19:07 C 12 48 33.68 +63 10 05.6 c 084
2002-05-10 00:11:25 C 12 48 30.14 +63 09 04.1 d 557
2002-05-10 01:05:56 C 12 48 26.61 +63 07 56.0 d 557
2002-05-10 01:57:05 C 12 48 23.42 +63 06 52.0 d 557
2002-05-10 23:08:20 C 12 47 10.27 +62 41 14.8 c 084
2002-05-11 20:41:43 C 12 46 02.02 +62 15 13.6 c 084
2002-05-12 01:41:25 C 12 45 45.57 +62 09 12.6 i 212
2002-05-12 01:49:30 C 12 45 45.15 +62 09 02.5 i 212
2002-05-12 20:44:39 C 12 44 52.38 +61 46 14.7 d 557
2002-05-12 21:45:18 C 12 44 49.23 +61 45 01.0 d 557
2002-05-12 22:42:36 C 12 44 46.30 +61 43 50.9 d 557
2002-05-12 23:30:45 C 12 44 44.11 +61 42 56.5 i 212
2002-05-12 23:34:02 C 12 44 43.94 +61 42 52.6 i 212
2002-05-12 23:50:33 C 12 44 42.91 +61 42 27.0 d 557
2002-05-13 00:48:09 C 12 44 40.12 +61 41 15.5 d 557
2002-05-13 01:45:27 C 12 44 37.43 +61 40 04.3 d 557
2002-05-13 21:44:53 C 12 43 47.20 +61 16 07.5 c 198
2002-05-13 21:52:36 C 12 43 46.64 +61 15 56.6 d 557
2002-05-13 21:56:19 C 12 43 46.69 +61 15 53.3 c 198
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)