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
2019-05-15 07:37:29 C 10 31 46.79 +52 13 37.9 V 703
2019-05-15 07:40:18 C 10 31 47.71 +52 13 43.4 V T08
2019-05-15 07:54:18 C 10 31 49.79 +52 13 28.8 V T08
2019-05-18 22:04:16 C 10 44 26.54 +50 45 56.3 V G40
2019-05-18 22:23:26 C 10 44 29.10 +50 45 36.5 V G40
2019-05-18 22:44:17 C 10 44 31.90 +50 45 15.0 V G40
2019-05-21 07:25:07 C 10 52 10.370 +49 47 46.28 U F51
2019-05-21 07:37:16 C 10 52 11.902 +49 47 33.73 U F51
2019-05-21 07:49:23 C 10 52 13.436 +49 47 21.16 U F51
2019-05-21 08:01:33 C 10 52 14.974 +49 47 08.57 U F51
2019-05-22 20:11:55 C 10 56 53.56 +49 10 24.3 V 094
2019-05-22 20:13:56 C 10 56 53.82 +49 10 22.1 V 094
2019-05-22 20:17:00 C 10 56 54.18 +49 10 19.1 V 094
2019-05-22 20:19:01 C 10 56 54.45 +49 10 16.9 V 094
2019-05-23 18:54:46 C 10 59 43.74 +48 47 27.1 V 094
2019-05-23 18:56:50 C 10 59 43.98 +48 47 25.0 V 094
2019-05-23 18:58:51 C 10 59 44.22 +48 47 22.9 V 094
2019-05-23 19:00:52 C 10 59 44.46 +48 47 20.9 V 094
2019-05-24 22:25:06 C 11 03 04.39 +48 19 34.5 V 094
2019-05-24 22:27:08 C 11 03 04.63 +48 19 32.4 V 094
2019-05-24 22:29:09 C 11 03 04.87 +48 19 30.3 V 094
2019-05-24 22:31:10 C 11 03 05.16 +48 19 27.9 V 094
2019-05-24 22:33:12 C 11 03 05.35 +48 19 26.0 V 094
2019-05-24 22:35:13 C 11 03 05.62 +48 19 23.7 V 094
2019-05-24 22:37:14 C 11 03 05.86 +48 19 21.8 V 094
2019-05-24 22:39:17 C 11 03 06.08 +48 19 19.8 V 094
2019-05-24 22:41:18 C 11 03 06.29 +48 19 18.0 V 094
2019-05-25 07:01:15 C 11 04 06.63 +48 11 03.8 V T05
2019-05-25 07:05:12 C 11 04 07.09 +48 10 59.8 V T05
2019-05-25 07:11:50 C 11 04 07.84 +48 10 53.0 V T05
2019-05-25 07:25:11 C 11 04 09.38 +48 10 39.3 V T05
2019-05-26 04:53:36 C 11 06 41.69 +47 48 56.7 V 703
2019-05-26 05:01:14 C 11 06 42.55 +47 48 48.9 V 703
2019-05-26 05:08:52 C 11 06 43.42 +47 48 41.0 V 703
2019-05-26 05:16:29 C 11 06 44.28 +47 48 32.8 V 703
2019-05-27 06:42:37 C 11 09 41.46 +47 23 00.0 V T08
2019-05-27 06:46:39 C 11 09 41.91 +47 22 55.9 V T08
2019-05-27 06:53:58 C 11 09 42.70 +47 22 48.4 V T08
2019-05-27 07:10:39 C 11 09 44.54 +47 22 31.3 V T08
2019-05-30 04:49:28 C 11 17 30.79 +46 12 29.7 V 703
2019-05-30 04:57:45 C 11 17 31.68 +46 12 21.4 V 703
2019-05-30 05:06:02 C 11 17 32.55 +46 12 12.9 V 703
2019-05-30 05:14:19 C 11 17 33.51 +46 12 03.3 V 703
2019-05-31 07:04:27 C 11 20 20.57 +45 46 14.9 V T08
2019-05-31 07:08:29 C 11 20 20.99 +45 46 10.9 V T08
2019-05-31 07:16:31 C 11 20 21.80 +45 46 02.6 V T08
2019-05-31 07:33:10 C 11 20 23.54 +45 45 45.6 V T08
2019-06-02 05:44:39 C 11 25 14.77 +44 59 30.7 U I41
2019-06-02 05:45:21 C 11 25 14.84 +44 59 30.0 U I41
2019-06-02 05:46:58 C 11 25 15.00 +44 59 28.3 U I41
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)