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
2022-07-23 18:15:42 C 13 22 26.87 +27 05 05.3 V C40
2022-07-23 18:17:47 C 13 22 26.99 +27 05 03.0 V C40
2022-07-23 18:21:11 C 13 22 27.19 +27 04 59.1 V C40
2022-07-23 18:23:15 C 13 22 27.31 +27 04 56.8 V C40
2022-07-23 18:24:38 C 13 22 27.39 +27 04 55.1 V C40
2022-07-23 18:34:54 C 13 22 28.00 +27 04 43.4 V C40
2022-07-23 19:16:39 C 13 22 30.53 +27 03 55.3 V C40
2022-07-24 18:13:21 C 13 23 53.45 +26 38 01.0 V C40
2022-07-24 18:20:53 C 13 23 53.88 +26 37 52.4 V C40
2022-07-24 18:24:19 C 13 23 54.09 +26 37 48.5 V C40
2022-07-24 18:24:59 C 13 23 54.12 +26 37 47.6 V C40
2022-07-24 18:26:22 C 13 23 54.21 +26 37 46.0 V C40
2022-07-24 18:30:29 C 13 23 54.44 +26 37 41.3 V C40
2022-07-24 18:33:54 C 13 23 54.65 +26 37 37.5 V C40
2022-07-24 18:36:38 C 13 23 54.81 +26 37 34.3 V C40
2022-07-24 18:37:20 C 13 23 54.85 +26 37 33.5 V C40
2022-07-24 19:01:22 C 13 23 56.27 +26 37 05.9 V C40
2022-07-24 19:12:19 C 13 23 56.91 +26 36 53.4 V C40
2022-07-24 19:13:41 C 13 23 57.00 +26 36 51.7 V C40
2022-07-24 19:15:04 C 13 23 57.08 +26 36 50.2 V C40
2022-07-24 19:24:38 C 13 23 57.65 +26 36 39.2 V C40
2022-07-24 19:34:14 C 13 23 58.23 +26 36 28.1 V C40
2022-07-24 20:39:07 C 13 24 02.271 +26 35 19.48 X J13
2022-07-24 20:39:56 C 13 24 02.311 +26 35 18.47 X J13
2022-07-24 20:40:45 C 13 24 02.349 +26 35 17.42 X J13
2022-07-24 20:41:33 C 13 24 02.413 +26 35 16.41 X J13
2022-07-24 20:42:22 C 13 24 02.460 +26 35 15.67 X J13
2022-07-24 20:43:11 C 13 24 02.502 +26 35 14.67 X J13
2022-07-24 20:43:59 C 13 24 02.552 +26 35 13.82 X J13
2022-07-24 20:44:48 C 13 24 02.589 +26 35 12.81 X J13
2022-07-25 07:43:52 C 13 24 42.079 +26 22 46.06 V T05
2022-07-25 07:47:37 C 13 24 42.286 +26 22 41.63 V T05
2022-07-25 07:56:45 C 13 24 42.833 +26 22 31.22 V T05
2022-07-25 08:11:05 C 13 24 43.673 +26 22 14.66 V T05
2022-07-25 20:44:01 C 13 25 29.351 +26 08 00.32 X J13
2022-07-25 20:44:49 C 13 25 29.402 +26 07 59.37 X J13
2022-07-25 20:45:38 C 13 25 29.452 +26 07 58.51 X J13
2022-07-25 20:46:27 C 13 25 29.499 +26 07 57.63 X J13
2022-07-25 20:47:15 C 13 25 29.542 +26 07 56.65 X J13
2022-07-25 20:48:04 C 13 25 29.585 +26 07 55.75 X J13
2022-07-25 20:48:53 C 13 25 29.636 +26 07 54.77 X J13
2022-07-25 20:49:41 C 13 25 29.684 +26 07 53.88 X J13
2022-07-25 20:50:30 C 13 25 29.731 +26 07 52.90 X J13
2022-07-25 20:51:19 C 13 25 29.775 +26 07 51.99 X J13
2022-07-25 21:43:08 C 13 25 32.83 +26 06 48.0 V C23
2022-07-25 21:47:26 C 13 25 33.10 +26 06 43.1 V C23
2022-07-25 22:02:34 C 13 25 34.00 +26 06 25.6 V C23
2022-07-25 22:04:43 C 13 25 34.11 +26 06 22.8 V C23
2022-07-26 06:44:55 C 13 26 05.470 +25 56 37.93 V T05
2022-07-26 06:49:29 C 13 26 05.734 +25 56 32.75 V T05
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)