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
2022-05-27 21:35:15 C 12 09 07.67 +52 17 08.6 V C40
2022-05-27 21:35:57 C 12 09 07.69 +52 17 07.7 V C40
2022-05-27 21:37:21 C 12 09 07.75 +52 17 06.1 V C40
2022-05-27 21:45:39 C 12 09 08.11 +52 16 56.2 V C40
2022-05-27 21:46:01 C 12 09 08.12 +52 16 55.7 V C40
2022-05-27 21:49:11 C 12 09 08.26 +52 16 51.9 V C40
2022-05-27 21:51:59 C 12 09 08.38 +52 16 48.5 V C40
2022-05-27 21:52:20 C 12 09 08.38 +52 16 48.1 V C40
2022-05-27 21:53:23 C 12 09 08.43 +52 16 46.8 V C40
2022-05-27 21:54:06 C 12 09 08.46 +52 16 46.1 V C40
2022-05-27 21:55:52 C 12 09 08.54 +52 16 43.9 V C40
2022-05-27 21:56:55 C 12 09 08.59 +52 16 42.6 V C40
2022-05-27 22:04:18 C 12 09 08.89 +52 16 33.8 V C40
2022-05-27 22:04:40 C 12 09 08.91 +52 16 33.3 V C40
2022-05-27 22:05:00 C 12 09 08.91 +52 16 33.0 V C40
2022-05-27 22:05:43 C 12 09 08.94 +52 16 32.0 V C40
2022-05-27 22:24:56 C 12 09 09.76 +52 16 09.0 V C40
2022-05-27 22:25:19 C 12 09 09.78 +52 16 08.6 V C40
2022-05-27 22:25:39 C 12 09 09.80 +52 16 08.2 V C40
2022-05-27 22:26:00 C 12 09 09.80 +52 16 07.8 V C40
2022-05-27 22:26:22 C 12 09 09.83 +52 16 07.4 V C40
2022-05-27 22:27:46 C 12 09 09.89 +52 16 05.7 V C40
2022-05-27 22:29:09 C 12 09 09.94 +52 16 03.9 V C40
2022-05-27 22:29:32 C 12 09 09.96 +52 16 03.6 V C40
2022-05-27 22:30:35 C 12 09 10.00 +52 16 02.3 V C40
2022-05-27 22:31:37 C 12 09 10.05 +52 16 01.0 V C40
2022-05-27 22:31:59 C 12 09 10.07 +52 16 00.6 V C40
2022-05-27 22:32:19 C 12 09 10.08 +52 16 00.1 V C40
2022-05-27 22:45:00 C 12 09 10.62 +52 15 45.0 V C40
2022-05-27 23:20:18 C 12 09 12.13 +52 15 02.5 V C40
2022-05-28 05:34:00 C 12 09 28.778 +52 07 55.49 V 703
2022-05-28 05:41:45 C 12 09 29.095 +52 07 46.34 V 703
2022-05-28 05:49:30 C 12 09 29.390 +52 07 37.13 V 703
2022-05-28 05:57:15 C 12 09 29.704 +52 07 27.95 V 703
2022-05-28 19:20:36 C 12 10 05.17 +51 51 50.6 V C40
2022-05-28 19:21:38 C 12 10 05.20 +51 51 49.4 V C40
2022-05-28 19:22:09 C 12 10 05.23 +51 51 48.9 V C40
2022-05-28 19:22:41 C 12 10 05.25 +51 51 48.3 V C40
2022-05-28 19:30:57 C 12 10 05.60 +51 51 38.4 V C40
2022-05-28 19:32:32 C 12 10 05.65 +51 51 36.6 V C40
2022-05-28 19:33:03 C 12 10 05.68 +51 51 36.0 V C40
2022-05-28 19:33:34 C 12 10 05.70 +51 51 35.4 V C40
2022-05-28 19:40:17 C 12 10 05.97 +51 51 27.4 V C40
2022-05-28 19:41:51 C 12 10 06.04 +51 51 25.6 V C40
2022-05-28 19:43:56 C 12 10 06.12 +51 51 23.1 V C40
2022-05-28 19:47:02 C 12 10 06.25 +51 51 19.4 V C40
2022-05-28 19:48:36 C 12 10 06.30 +51 51 17.6 V C40
2022-05-28 19:49:07 C 12 10 06.34 +51 51 16.9 V C40
2022-05-28 19:56:39 C 12 10 06.63 +51 51 08.1 V C40
2022-05-28 19:57:10 C 12 10 06.66 +51 51 07.4 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)