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
2002-05-13 22:00:53 C 12 43 46.44 +61 15 47.8 c 198
2002-05-13 22:37:16 C 12 43 44.57 +61 15 01.9 d 557
2002-05-13 23:29:12 C 12 43 42.21 +61 13 58.1 d 557
2002-05-14 00:06:27 C 12 43 40.56 +61 13 12.0 d 557
2002-05-14 00:44:45 C 12 43 38.92 +61 12 24.6 d 557
2002-05-14 01:35:59 C 12 43 36.75 +61 11 20.9 d 557
2002-05-14 19:59:34 C 12 42 56.02 +60 49 21.1 c 151
2002-05-14 20:02:48 C 12 42 55.72 +60 49 17.0 d 557
2002-05-14 20:05:07 C 12 42 55.79 +60 49 15.0 c 151
2002-05-14 20:09:48 C 12 42 55.59 +60 49 08.9 c 151
2002-05-14 20:21:02 C 12 42 55.12 +60 48 55.8 c 151
2002-05-14 21:00:23 C 12 42 53.25 +60 48 07.7 d 557
2002-05-14 22:00:03 C 12 42 50.73 +60 46 55.1 d 557
2002-05-14 23:01:12 C 12 42 48.21 +60 45 40.2 d 557
2002-05-15 00:05:41 C 12 42 45.61 +60 44 20.9 d 557
2002-05-15 01:00:00 C 12 42 43.53 +60 43 13.7 d 557
2002-05-15 01:51:03 C 12 42 41.62 +60 42 10.4 d 557
2002-05-15 21:35:00 C 12 42 02.46 +60 18 37.3 c 215
2002-05-15 21:35:33 C 12 42 02.44 +60 18 36.9 c 215
2002-05-15 21:36:07 C 12 42 02.40 +60 18 36.3 c 215
2002-05-15 22:31:29 C 12 42 00.24 +60 17 28.0 d 557
2002-05-15 22:57:02 C 12 41 59.31 +60 16 56.6 d 557
2002-05-15 23:48:23 C 12 41 57.47 +60 15 53.6 d 557
2002-05-16 01:16:41 C 12 41 54.48 +60 14 06.1 c 198
2002-05-16 01:20:45 C 12 41 54.33 +60 14 00.9 c 198
2002-05-16 01:31:01 C 12 41 53.99 +60 13 48.1 c 198
2002-05-16 20:19:45 C 12 41 21.37 +59 51 21.8 d 557
2002-05-16 21:45:51 C 12 41 18.44 +59 49 38.0 d 557
2002-05-17 01:14:13 C 12 41 11.89 +59 45 22.8 d 557
2002-05-17 01:40:29 C 12 41 11.17 +59 44 51.6 c 198
2002-05-17 01:42:28 C 12 41 11.09 +59 44 49.1 c 198
2002-05-17 01:50:17 C 12 41 10.87 +59 44 39.8 c 198
2002-05-17 01:52:14 C 12 41 10.80 +59 44 37.3 c 198
2002-05-17 01:56:07 C 12 41 10.72 +59 44 32.6 c 198
2002-05-17 20:27:02 C 12 40 43.04 +59 22 32.0 c 198
2002-05-17 20:29:09 C 12 40 42.97 +59 22 29.8 c 198
2002-05-17 21:11:00 C 12 40 41.71 +59 21 39.6 c 198
2002-05-17 21:54:38 C 12 40 40.38 +59 20 46.9 c 198
2002-05-17 22:05:08 C 12 40 40.08 +59 20 34.4 c 198
2002-05-17 22:12:59 C 12 40 39.82 +59 20 25.0 c 198
2002-05-19 01:31:35 C 12 40 02.51 +58 47 47.4 15.5 939
2002-05-19 01:40:09 C 12 40 02.25 +58 47 36.9 15.5 939
2002-05-19 01:48:37 C 12 40 02.03 +58 47 26.7 15.5 939
2002-05-19 14:49:18 C 12 39 46.98 +58 32 03.0 e 379
2002-05-19 14:54:14 C 12 39 46.85 +58 31 56.8 e 379
2002-05-20 11:42:42 C 12 39 26.64 +58 07 17.8 e 379
2002-05-20 11:51:24 C 12 39 26.47 +58 07 07.4 e 379
2002-05-20 11:58:19 C 12 39 26.32 +58 06 59.0 e 379
2002-05-20 20:00:34 C 12 39 19.25 +57 57 24.1 c 151
2002-05-20 20:09:16 C 12 39 19.07 +57 57 13.8 c 151
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)