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
2008-06-05 21:14:21 C 15 24 58.82 +64 20 09.3 o A81
2008-06-05 21:16:16 C 15 24 58.38 +64 20 08.8 o A81
2008-06-05 21:17:53 C 15 24 58.04 +64 20 08.6 o A81
2008-06-05 21:19:35 C 15 24 57.68 +64 20 08.4 o A81
2008-06-07 06:00:19 C 15 18 02.55 +64 12 53.9 r H45
2008-06-07 06:01:59 C 15 18 02.17 +64 12 53.8 r H45
2008-06-07 06:05:00 C 15 18 01.50 +64 12 53.4 r H45
2008-06-07 06:21:44 C 15 17 57.88 +64 12 48.5 r H45
2008-06-07 06:24:21 C 15 17 57.28 +64 12 47.8 r H45
2008-06-08 21:41:15 C 15 09 52.11 +64 01 09.9 o J51
2008-06-08 21:50:43 C 15 09 50.07 +64 01 06.8 o J51
2008-06-08 21:59:21 C 15 09 48.20 +64 01 04.0 o J51
2008-06-09 23:14:20 C 15 04 40.90 +63 51 51.1 c J93
2008-06-09 23:17:53 C 15 04 40.19 +63 51 50.0 c J93
2008-06-09 23:21:27 C 15 04 39.43 +63 51 48.5 c J93
2008-06-10 23:53:00 C 14 59 47.36 +63 41 48.2 c J93
2008-06-10 23:57:02 C 14 59 46.64 +63 41 46.2 c J93
2008-06-11 00:01:05 C 14 59 45.75 +63 41 44.7 c J93
2008-06-11 05:53:07 C 14 58 36.49 +63 39 15.4 r H45
2008-06-11 05:56:22 C 14 58 35.83 +63 39 13.7 r H45
2008-06-11 05:58:36 C 14 58 35.37 +63 39 12.8 r H45
2008-06-11 06:00:46 C 14 58 34.93 +63 39 11.7 r H45
2008-06-11 06:02:40 C 14 58 34.54 +63 39 10.8 r H45
2008-06-13 11:07:54 C 14 48 27.89 +63 13 20.4 m 379
2008-06-13 11:10:33 C 14 48 27.37 +63 13 19.1 m 379
2008-06-13 11:24:32 C 14 48 24.66 +63 13 11.7 m 379
2008-06-13 11:29:53 C 14 48 23.65 +63 13 08.9 m 379
2008-06-13 11:50:52 C 14 48 19.55 +63 12 57.8 m 379
2008-06-13 11:54:22 C 14 48 18.84 +63 12 55.9 m 379
2008-06-13 22:14:23 C 14 46 23.76 +63 07 21.2 o J51
2008-06-13 22:20:28 C 14 46 22.58 +63 07 17.9 o J51
2008-06-13 22:26:33 C 14 46 21.39 +63 07 14.6 o J51
2008-06-14 05:58:14 C 14 44 57.69 +63 03 01.0 r 703
2008-06-14 06:03:52 C 14 44 56.61 +63 02 57.7 r 703
2008-06-14 06:09:27 C 14 44 55.50 +63 02 54.4 r 703
2008-06-14 06:15:03 C 14 44 54.45 +63 02 51.2 r 703
2008-06-14 23:18:10 C 14 41 48.14 +62 52 56.7 o A81
2008-06-14 23:23:14 C 14 41 47.16 +62 52 53.5 o A81
2008-06-14 23:28:17 C 14 41 46.24 +62 52 50.2 o A81
2008-06-14 23:33:20 C 14 41 45.29 +62 52 47.1 o A81
2008-06-17 20:50:47 C 14 29 43.50 +62 08 21.5 c J27
2008-06-17 20:58:07 C 14 29 42.21 +62 08 16.3 c J27
2008-06-21 22:27:44 C 14 14 08.36 +60 54 32.2 o A81
2008-06-21 22:31:07 C 14 14 07.82 +60 54 29.4 o A81
2008-06-21 22:34:31 C 14 14 07.36 +60 54 26.5 o A81
2008-06-22 01:18:21 C 14 13 42.23 +60 52 06.8 15.6 c B06
2008-06-22 01:22:00 C 14 13 41.61 +60 52 04.8 15.5 c B06
2008-06-22 01:25:51 C 14 13 41.05 +60 52 00.1 15.5 c B06
2008-06-22 01:29:40 C 14 13 40.27 +60 51 56.4 15.5 c B06
2008-06-22 01:33:12 C 14 13 39.74 +60 51 54.6 15.6 c B06
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)