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
2022-05-24 22:16:56 C 12 06 04.71 +53 41 01.7 V C40
2022-05-24 22:17:17 C 12 06 04.73 +53 41 01.3 V C40
2022-05-24 22:17:38 C 12 06 04.75 +53 41 00.9 V C40
2022-05-24 22:18:21 C 12 06 04.78 +53 41 00.1 V C40
2022-05-24 22:19:04 C 12 06 04.80 +53 40 59.2 V C40
2022-05-24 22:27:33 C 12 06 05.15 +53 40 48.8 V C40
2022-05-24 22:28:16 C 12 06 05.18 +53 40 48.0 V C40
2022-05-24 22:28:37 C 12 06 05.20 +53 40 47.5 V C40
2022-05-24 22:29:20 C 12 06 05.22 +53 40 46.7 V C40
2022-05-24 22:30:01 C 12 06 05.26 +53 40 45.8 V C40
2022-05-24 22:31:48 C 12 06 05.33 +53 40 43.6 V C40
2022-05-24 22:31:57 C 12 06 05.73 +53 40 46.2 V C23
2022-05-24 22:35:43 C 12 06 05.49 +53 40 38.8 V C40
2022-05-24 22:36:03 C 12 06 05.50 +53 40 38.6 V C40
2022-05-24 22:37:20 C 12 06 05.93 +53 40 39.6 V C23
2022-05-24 22:41:39 C 12 06 06.10 +53 40 34.5 V C23
2022-05-25 05:17:34 C 12 06 22.961 +53 32 51.00 U I41
2022-05-25 05:21:15 C 12 06 23.100 +53 32 46.61 U I41
2022-05-25 20:36:52 C 12 07 01.52 +53 14 39.8 V C40
2022-05-25 20:41:42 C 12 07 01.70 +53 14 33.9 V C40
2022-05-25 20:44:09 C 12 07 01.80 +53 14 31.0 V C40
2022-05-25 20:45:14 C 12 07 01.84 +53 14 29.8 V C40
2022-05-25 20:45:55 C 12 07 01.86 +53 14 28.8 V C40
2022-05-25 20:46:58 C 12 07 01.91 +53 14 27.6 V C40
2022-05-25 20:47:42 C 12 07 01.95 +53 14 26.7 V C40
2022-05-25 20:48:02 C 12 07 01.95 +53 14 26.2 V C40
2022-05-25 20:49:26 C 12 07 02.01 +53 14 24.6 V C40
2022-05-25 20:51:55 C 12 07 02.11 +53 14 21.5 V C40
2022-05-25 20:53:19 C 12 07 02.17 +53 14 19.8 V C40
2022-05-25 20:53:40 C 12 07 02.17 +53 14 19.4 V C40
2022-05-25 20:54:02 C 12 07 02.18 +53 14 19.1 V C40
2022-05-25 20:54:23 C 12 07 02.20 +53 14 18.7 V C40
2022-05-25 20:54:43 C 12 07 02.21 +53 14 18.1 V C40
2022-05-25 20:55:05 C 12 07 02.23 +53 14 17.8 V C40
2022-05-25 20:55:26 C 12 07 02.24 +53 14 17.3 V C40
2022-05-25 20:57:12 C 12 07 02.31 +53 14 15.3 V C40
2022-05-25 20:57:53 C 12 07 02.34 +53 14 14.4 V C40
2022-05-25 20:58:14 C 12 07 02.37 +53 14 13.9 V C40
2022-05-25 21:00:00 C 12 07 02.42 +53 14 11.8 V C40
2022-05-25 21:01:03 C 12 07 02.47 +53 14 10.5 V C40
2022-05-25 21:01:46 C 12 07 02.51 +53 14 09.6 V C40
2022-05-25 21:08:15 C 12 07 02.77 +53 14 01.9 V C40
2022-05-25 21:09:40 C 12 07 02.82 +53 14 00.1 V C40
2022-05-25 21:10:02 C 12 07 02.84 +53 13 59.8 V C40
2022-05-25 21:10:22 C 12 07 02.84 +53 13 59.3 V C40
2022-05-25 21:12:29 C 12 07 02.93 +53 13 56.7 V C40
2022-05-25 21:12:50 C 12 07 02.95 +53 13 56.4 V C40
2022-05-25 21:14:15 C 12 07 03.00 +53 13 54.7 V C40
2022-05-25 21:14:36 C 12 07 03.02 +53 13 54.2 V C40
2022-05-25 21:14:56 C 12 07 03.02 +53 13 53.6 V C40
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)