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
2002-04-03 23:32:43 C 17 33 33.29 +73 55 49.1 c 198
2002-04-03 23:33:38 C 17 33 32.71 +73 55 50.2 c 198
2002-04-03 23:35:01 C 17 33 31.40 +73 55 52.9 d 557
2002-04-03 23:40:28 C 17 33 28.11 +73 55 58.9 c 198
2002-04-03 23:52:54 C 17 33 19.61 +73 56 14.7 c 198
2002-04-03 23:54:46 C 17 33 18.42 +73 56 16.9 c 198
2002-04-04 01:56:47 C 17 31 54.87 +73 58 45.7 d 557
2002-04-04 02:51:31 C 17 31 17.25 +73 59 50.0 d 557
2002-04-04 14:36:55 C 17 23 29.86 +74 12 23.1 379
2002-04-04 14:46:45 C 17 23 23.11 +74 12 33.8 379
2002-04-05 23:14:32 C 17 01 29.20 +74 40 31.2 c 198
2002-04-05 23:16:22 C 17 01 27.99 +74 40 32.6 c 198
2002-04-05 23:20:24 C 17 01 25.26 +74 40 35.7 c 198
2002-04-05 23:24:11 C 17 01 22.66 +74 40 38.7 c 198
2002-04-05 23:27:52 C 17 01 20.17 +74 40 41.6 c 198
2002-04-05 23:29:42 C 17 01 18.90 +74 40 43.0 c 198
2002-04-06 22:04:24 C 16 46 07.62 +74 54 12.2 c 127
2002-04-06 22:10:43 C 16 46 03.33 +74 54 15.9 c 127
2002-04-06 22:19:05 C 16 45 57.68 +74 54 20.6 c 127
2002-04-07 00:23:49 C 16 44 32.86 +74 55 30.5 c 198
2002-04-07 00:26:34 C 16 44 30.99 +74 55 32.2 c 198
2002-04-07 00:30:16 C 16 44 28.44 +74 55 34.4 c 198
2002-04-07 00:39:30 C 16 44 20.09 +74 55 37.1 c 084
2002-04-07 21:42:48 C 16 30 23.89 +75 03 38.3 c 127
2002-04-07 21:48:55 C 16 30 19.81 +75 03 40.6 c 127
2002-04-07 21:54:46 C 16 30 15.90 +75 03 42.9 c 127
2002-04-08 00:57:40 C 16 28 11.52 +75 04 43.6 c 084
2002-04-09 01:39:55 C 16 12 08.39 +75 09 03.8 c 084
2002-04-09 13:39:19 C 16 04 38.00 +75 09 30.0 379
2002-04-09 14:09:43 C 16 04 18.36 +75 09 32.4 379
2002-04-09 19:30:20 C 16 00 57.56 +75 09 05.2 c 198
2002-04-09 19:38:42 C 16 00 52.33 +75 09 05.5 c 198
2002-04-09 19:47:01 C 16 00 47.18 +75 09 05.7 c 198
2002-04-09 20:13:18 C 16 00 30.87 +75 09 06.3 c 198
2002-04-10 20:12:26 C 15 45 52.88 +75 05 56.3 c 198
2002-04-10 21:09:06 C 15 45 18.60 +75 05 48.0 c 198
2002-04-10 21:31:32 C 15 45 05.12 +75 05 44.7 c 198
2002-04-11 23:45:15 C 15 29 48.63 +74 58 01.5 c 084
2002-04-12 11:17:28 C 15 23 28.24 +74 53 11.7 367
2002-04-12 11:20:10 C 15 23 26.75 +74 53 10.7 367
2002-04-12 11:22:50 C 15 23 25.29 +74 53 09.6 367
2002-04-12 11:25:29 C 15 23 23.81 +74 53 08.6 367
2002-04-12 11:28:11 C 15 23 22.37 +74 53 07.9 367
2002-04-12 12:57:28 C 15 22 32.96 +74 52 38.1 379
2002-04-12 12:58:59 C 15 22 31.92 +74 52 37.1 379
2002-04-12 13:01:31 C 15 22 30.66 +74 52 36.7 379
2002-04-12 13:03:25 C 15 22 29.48 +74 52 35.6 379
2002-04-12 13:05:43 C 15 22 28.38 +74 52 34.7 379
2002-04-12 13:09:33 C 15 22 25.99 +74 52 33.5 379
2002-04-12 13:11:57 C 15 22 24.78 +74 52 32.6 379
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)