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
2002-04-12 13:17:02 C 15 22 21.88 +74 52 30.6 379
2002-04-12 13:23:36 C 15 22 18.02 +74 52 27.8 379
2002-04-12 23:59:45 C 15 16 30.48 +74 47 25.4 c 084
2002-04-14 23:30:52 C 14 52 43.37 +74 18 44.7 c 198
2002-04-14 23:33:01 C 14 52 42.32 +74 18 43.2 c 198
2002-04-14 23:36:12 C 14 52 40.74 +74 18 41.0 c 198
2002-04-14 23:39:27 C 14 52 39.19 +74 18 38.7 c 198
2002-04-14 23:44:53 C 14 52 36.52 +74 18 35.0 c 198
2002-04-15 20:22:37 C 14 43 15.33 +74 03 12.0 c 198
2002-04-15 20:29:55 C 14 43 12.05 +74 03 06.8 c 198
2002-04-15 20:37:32 C 14 43 08.64 +74 03 01.3 c 198
2002-04-15 20:38:36 C 14 43 08.10 +74 03 00.5 c 198
2002-04-17 21:31:35 C 14 23 03.93 +73 21 35.9 c 198
2002-04-17 21:33:46 C 14 23 03.10 +73 21 33.9 c 198
2002-04-17 21:40:18 C 14 23 00.49 +73 21 28.0 c 198
2002-04-17 21:43:33 C 14 22 59.23 +73 21 25.2 c 198
2002-04-17 21:48:59 C 14 22 57.07 +73 21 20.3 c 198
2002-04-18 22:39:51 C 14 13 50.81 +72 57 52.3 c 084
2002-04-19 21:03:03 C 14 06 19.24 +72 35 42.9 c 198
2002-04-19 21:05:12 C 14 06 18.51 +72 35 40.8 c 198
2002-04-19 21:11:45 C 14 06 16.29 +72 35 34.4 c 198
2002-04-19 21:20:19 C 14 06 13.41 +72 35 25.9 c 198
2002-04-19 21:23:00 C 14 06 12.50 +72 35 23.4 c 198
2002-04-20 08:11:38 C 14 02 42.52 +72 24 28.0 c 699
2002-04-20 08:34:02 C 14 02 35.10 +72 24 04.5 c 699
2002-04-20 08:56:14 C 14 02 27.79 +72 23 41.1 c 699
2002-04-20 09:18:24 C 14 02 20.48 +72 23 17.6 c 699
2002-04-20 09:52:07 C 14 02 09.41 +72 22 41.5 c 699
2002-04-20 10:14:11 C 14 02 02.21 +72 22 17.8 c 699
2002-04-20 10:36:28 C 14 01 54.97 +72 21 53.7 c 699
2002-04-20 10:58:42 C 14 01 47.78 +72 21 29.3 c 699
2002-04-20 22:18:52 C 13 58 23.19 +72 09 38.1 c 084
2002-04-21 04:38:03 C 13 56 33.14 +72 02 55.7 c 642
2002-04-21 04:45:25 C 13 56 30.88 +72 02 48.3 c 642
2002-04-21 04:50:58 C 13 56 29.25 +72 02 42.7 c 642
2002-04-21 04:53:47 C 13 56 28.40 +72 02 39.7 c 642
2002-04-21 21:17:41 C 13 51 46.55 +71 45 07.8 m 611
2002-04-21 21:21:15 C 13 51 45.48 +71 45 04.5 m 611
2002-04-21 21:44:37 C 13 51 37.64 +71 44 37.0 c 084
2002-04-22 21:38:45 C 13 45 16.45 +71 18 28.8 c 198
2002-04-22 21:41:28 C 13 45 15.70 +71 18 25.7 c 198
2002-04-22 21:46:31 C 13 45 14.35 +71 18 20.2 c 198
2002-04-22 21:53:15 C 13 45 12.54 +71 18 12.9 c 198
2002-04-22 21:57:17 C 13 45 11.42 +71 18 08.4 c 198
2002-04-22 23:22:10 C 13 44 47.92 +71 16 29.3 c 084
2002-04-23 02:42:30 C 13 43 55.84 +71 12 44.6 o 544
2002-04-23 02:45:29 C 13 43 55.14 +71 12 41.0 o 544
2002-04-24 00:07:45 C 13 38 44.62 +70 48 41.2 c 084
2002-04-25 20:47:16 C 13 29 04.25 +69 57 27.2 c 198
2002-04-25 20:50:28 C 13 29 03.58 +69 57 23.5 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)