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
2014-06-09 21:47:37 C 21 59 32.16 +62 57 42.7 q 073
2014-06-09 22:18:32 C 21 59 40.85 +62 58 39.1 q C47
2014-06-09 22:18:42 C 21 59 41.03 +62 58 42.1 q 073
2014-06-09 22:24:23 C 21 59 42.50 +62 58 50.2 q C47
2014-06-09 22:30:44 C 21 59 44.29 +62 59 02.2 q C47
2014-06-09 22:37:07 C 21 59 46.10 +62 59 14.5 q C47
2014-06-09 22:51:22 C 21 59 50.12 +62 59 44.6 q 073
2014-06-09 23:22:31 C 21 59 58.90 +63 00 44.2 q 073
2014-06-09 23:53:28 C 22 00 07.47 +63 01 42.5 q 073
2014-06-10 04:02:13 C 22 01 18.58 +63 09 31.4 q G40
2014-06-10 04:16:39 C 22 01 22.60 +63 09 58.6 q G40
2014-06-10 04:26:49 C 22 01 25.44 +63 10 17.7 q G40
2014-06-10 04:31:22 C 22 01 26.72 +63 10 26.2 q G40
2014-06-10 04:36:21 C 22 01 28.11 +63 10 35.5 q G40
2014-06-12 21:43:17 C 22 22 16.44 +65 08 50.0 q G34
2014-06-12 21:46:54 C 22 22 17.72 +65 08 56.7 q G34
2014-06-12 21:48:29 C 22 22 18.25 +65 08 59.6 q G34
2014-06-12 21:51:20 C 22 22 19.26 +65 09 04.8 q G34
2014-06-12 21:53:34 C 22 22 20.10 +65 09 09.0 q G34
2014-06-12 21:55:17 C 22 22 20.70 +65 09 12.0 q G34
2014-06-13 21:42:26 C 22 31 02.59 +65 51 00.6 t L04
2014-06-13 21:45:25 C 22 31 03.68 +65 51 05.8 t L04
2014-06-13 21:47:19 C 22 31 04.43 +65 51 09.3 t L04
2014-06-13 21:52:37 C 22 31 06.42 +65 51 18.8 t L04
2014-06-13 21:54:01 C 22 31 06.97 +65 51 21.2 t L04
2014-06-14 07:41:37 C 22 34 53.16 +66 08 22.4 u H21
2014-06-14 07:45:11 C 22 34 54.52 +66 08 28.7 u H21
2014-06-14 07:50:32 C 22 34 56.59 +66 08 38.1 u H21
2014-06-14 07:55:53 C 22 34 58.64 +66 08 47.5 u H21
2014-06-14 08:01:15 C 22 35 00.70 +66 08 57.0 u H21
2014-06-14 08:04:29 C 22 35 01.94 +66 09 02.6 u H21
2014-06-15 08:16:48 C 22 44 53.44 +66 49 45.9 u H21
2014-06-15 08:19:27 C 22 44 54.55 +66 49 50.4 u H21
2014-06-15 08:24:27 C 22 44 56.62 +66 49 58.8 u H21
2014-06-15 08:29:26 C 22 44 58.70 +66 50 07.3 u H21
2014-06-15 08:34:26 C 22 45 00.76 +66 50 15.6 u H21
2014-06-15 08:38:05 C 22 45 02.27 +66 50 21.9 u H21
2014-06-15 08:41:45 C 22 45 03.80 +66 50 28.0 u H21
2014-07-07 21:53:04 C 04 30 26.78 +60 59 26.8 q 089
2014-07-07 21:56:33 C 04 30 28.41 +60 59 14.9 q 089
2014-07-07 22:00:03 C 04 30 30.01 +60 59 02.5 q 089
2014-07-07 22:03:33 C 04 30 31.64 +60 58 50.1 q 089
2014-07-07 22:07:03 C 04 30 33.25 +60 58 37.9 q 089
2014-07-07 22:10:33 C 04 30 34.93 +60 58 25.5 q 089
2014-07-07 22:14:03 C 04 30 36.49 +60 58 13.4 q 089
2014-07-07 22:23:14 C 04 30 40.76 +60 57 41.2 q 089
2014-07-08 00:01:53 C 04 31 26.13 +60 51 55.5 15.7 c 583
2014-07-08 00:02:23 C 04 31 26.35 +60 51 53.7 15.7 c 583
2014-07-08 00:02:52 C 04 31 26.59 +60 51 51.9 15.6 c 583
2014-07-08 00:03:23 C 04 31 26.83 +60 51 50.0 15.6 c 583
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)