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
1999-08-25 19:20:34 C 14 12 53.63 +10 30 32.1 c 118
1999-08-25 19:41:39 C 14 12 55.06 +10 30 05.9 c 118
1999-08-29 19:14:15 C 14 19 29.00 +08 28 29.7 z 151
1999-08-29 19:28:44 C 14 19 30.15 +08 28 10.7 z 151
1999-08-29 19:31:03 C 14 19 30.04 +08 28 07.2 z 151
1999-09-02 19:15:22 C 14 25 51.72 +06 21 23.7 z 151
1999-09-02 19:20:45 C 14 25 52.06 +06 21 16.2 z 151
1999-09-02 19:25:31 C 14 25 52.33 +06 21 09.4 z 151
1999-09-02 19:35:19 C 14 25 52.95 +06 20 57.0 z 151
1999-09-02 19:40:46 C 14 25 53.37 +06 20 49.6 z 151
1999-09-02 19:53:37 C 14 25 54.17 +06 20 31.5 z 151
1999-09-02 19:56:15 C 14 25 54.24 +06 20 28.3 z 151
1999-12-30 17:44:52 C 15 26 51.56 -09 43 45.7 413
1999-12-30 17:49:38 C 15 26 52.12 -09 43 45.5 413
2000-01-03 05:18:08 C 15 37 39.56 -09 20 53.0 z 104
2000-01-03 05:19:41 C 15 37 39.73 -09 20 52.3 z 104
2000-01-04 05:27:59 C 15 40 45.75 -09 14 02.4 z 104
2000-01-04 05:29:35 C 15 40 45.92 -09 14 02.1 z 104
2000-01-04 05:32:28 C 15 40 46.32 -09 14 01.3 z 104
2000-01-04 05:35:46 C 15 40 46.75 -09 14 00.2 z 104
2000-01-04 05:37:20 C 15 40 46.96 -09 14 00.1 z 104
2000-04-03 02:09:23 C 19 59 38.96 +10 47 29.6 611
2000-04-03 02:12:21 C 19 59 39.37 +10 47 32.0 611
2000-04-03 02:14:51 C 19 59 39.67 +10 47 34.0 611
2000-04-03 02:17:26 C 19 59 39.94 +10 47 35.6 611
2000-04-03 11:34:42 C 20 00 50.74 +10 55 30.5 i 670
2000-04-03 12:13:01 C 20 00 55.70 +10 56 03.7 i 670
2000-04-03 12:44:09 C 20 00 59.63 +10 56 29.7 i 670
2000-04-08 09:53:57 C 20 16 09.04 +12 37 22.7 i 739
2000-04-08 09:57:54 C 20 16 09.59 +12 37 26.5 i 739
2000-04-08 10:02:41 C 20 16 10.21 +12 37 30.5 i 739
2000-04-28 08:16:37 C 21 25 50.82 +19 47 06.9 860
2000-04-28 08:19:56 C 21 25 51.30 +19 47 10.4 860
2000-04-28 08:23:15 C 21 25 51.83 +19 47 12.9 860
2000-04-28 17:47:35 C 21 27 25.06 +19 55 31.9 a 349
2000-04-28 17:52:09 C 21 27 25.90 +19 55 35.6 a 349
2000-04-28 17:53:56 C 21 27 26.23 +19 55 37.3 a 349
2000-05-14 01:19:00 C 22 36 23.16 +25 08 49.0 c 118
2000-05-14 01:28:27 C 22 36 25.18 +25 08 56.4 c 118
2000-05-28 01:52:53 C 23 58 34.12 +28 25 42.3 z 151
2000-05-28 01:54:48 C 23 58 34.58 +28 25 45.4 z 151
2000-05-28 01:56:11 C 23 58 34.86 +28 25 45.5 z 151
2000-06-01 01:58:34 C 00 25 51.52 +28 50 02.4 z 151
2000-06-01 01:59:58 C 00 25 52.01 +28 50 02.3 z 151
2000-06-01 02:01:13 C 00 25 52.45 +28 50 02.9 z 151
2000-06-01 02:02:43 C 00 25 52.80 +28 50 03.2 z 151
2000-06-03 01:41:32 C 00 39 59.12 +28 54 58.4 z 151
2000-06-03 01:43:53 C 00 39 59.71 +28 55 00.2 z 151
2000-06-03 01:46:47 C 00 40 00.70 +28 54 59.4 z 151
2000-06-03 01:49:45 C 00 40 01.54 +28 54 59.7 z 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)