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
2025-04-20 22:11:25 C 16 00 23.549 +65 40 46.09 W M01
2025-04-20 22:13:55 C 16 00 22.823 +65 40 47.33 W M01
2025-04-20 22:37:08 C 16 00 16.127 +65 41 00.30 W M01
2025-04-20 22:39:38 C 16 00 15.399 +65 41 01.61 W M01
2025-04-20 22:42:08 C 16 00 14.671 +65 41 02.91 W M01
2025-04-20 23:37:05 C 15 59 58.618 +65 41 30.50 W M01
2025-04-20 23:39:35 C 15 59 57.887 +65 41 31.74 W M01
2025-04-20 23:42:05 C 15 59 57.156 +65 41 32.98 W M01
2025-04-21 00:22:51 C 15 59 45.270 +65 41 52.18 W M01
2025-04-21 00:25:21 C 15 59 44.538 +65 41 53.35 W M01
2025-04-21 00:26:54 C 15 59 44.036 +65 41 54.16 W M01
2025-04-21 00:27:51 C 15 59 43.807 +65 41 54.52 W M01
2025-04-21 00:29:24 C 15 59 43.296 +65 41 55.34 W M01
2025-04-21 00:31:54 C 15 59 42.556 +65 41 56.53 W M01
2025-04-21 00:33:31 C 15 59 42.141 +65 41 57.61 W M01
2025-04-21 00:36:01 C 15 59 41.406 +65 41 58.83 W M01
2025-04-21 00:38:31 C 15 59 40.670 +65 42 00.05 W M01
2025-04-21 00:44:35 C 15 59 38.923 +65 42 02.66 W M01
2025-04-21 00:47:05 C 15 59 38.191 +65 42 03.84 W M01
2025-04-21 00:49:35 C 15 59 37.459 +65 42 05.03 W M01
2025-04-21 00:58:14 C 15 59 34.945 +65 42 08.81 W M01
2025-04-21 01:00:44 C 15 59 34.215 +65 42 09.94 W M01
2025-04-21 01:03:14 C 15 59 33.485 +65 42 11.08 W M01
2025-04-21 01:08:02 C 15 59 32.081 +65 42 13.33 W M01
2025-04-21 01:10:32 C 15 59 31.358 +65 42 14.45 W M01
2025-04-21 01:13:02 C 15 59 30.636 +65 42 15.58 W M01
2025-04-21 01:20:05 C 15 59 28.577 +65 42 18.83 W M01
2025-04-21 01:22:35 C 15 59 27.850 +65 42 19.96 W M01
2025-04-21 01:25:05 C 15 59 27.122 +65 42 21.08 W M01
2025-04-21 01:29:39 C 15 59 25.800 +65 42 23.19 W M01
2025-04-21 01:30:18 C 15 59 25.585 +65 42 23.79 W M01
2025-04-21 01:32:09 C 15 59 25.073 +65 42 24.29 W M01
2025-04-21 01:32:48 C 15 59 24.862 +65 42 24.88 W M01
2025-04-21 01:34:39 C 15 59 24.346 +65 42 25.40 W M01
2025-04-21 01:35:18 C 15 59 24.139 +65 42 25.98 W M01
2025-04-21 01:40:51 C 15 59 22.535 +65 42 28.43 W M01
2025-04-21 01:41:42 C 15 59 22.292 +65 42 28.58 W M01
2025-04-21 01:43:21 C 15 59 21.810 +65 42 29.56 W M01
2025-04-21 01:44:12 C 15 59 21.568 +65 42 29.69 W M01
2025-04-21 01:45:52 C 15 59 21.086 +65 42 30.69 W M01
2025-04-21 01:46:42 C 15 59 20.843 +65 42 30.80 W M01
2025-04-21 02:03:17 C 15 59 16.029 +65 42 38.16 W M01
2025-04-21 02:05:47 C 15 59 15.305 +65 42 39.25 W M01
2025-04-21 02:08:17 C 15 59 14.581 +65 42 40.34 W M01
2025-04-21 09:27:59 C 15 57 13.586 +65 46 08.87 V 703
2025-04-21 09:31:24 C 15 57 12.596 +65 46 10.38 V 703
2025-04-21 09:34:48 C 15 57 11.585 +65 46 11.82 V 703
2025-04-21 09:38:12 C 15 57 10.595 +65 46 13.55 V 703
2025-04-21 18:04:54 C 15 54 52.419 +65 49 42.73 W M01
2025-04-21 18:07:24 C 15 54 51.730 +65 49 44.00 W M01
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)