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
2022-05-12 23:02:24 C 11 54 56.83 +59 36 01.8 V C23
2022-05-12 23:12:26 C 11 54 56.93 +59 35 49.3 V L63
2022-05-12 23:29:12 C 11 54 57.48 +59 35 27.0 V L63
2022-05-12 23:45:28 C 11 54 57.99 +59 35 05.4 V L63
2022-05-13 19:43:24 C 11 55 41.37 +59 09 19.3 V C40
2022-05-13 19:44:49 C 11 55 41.42 +59 09 17.5 V C40
2022-05-13 19:46:12 C 11 55 41.46 +59 09 15.6 V C40
2022-05-13 19:48:20 C 11 55 41.53 +59 09 12.9 V C40
2022-05-13 19:48:42 C 11 55 41.54 +59 09 12.4 V C40
2022-05-13 19:49:03 C 11 55 41.55 +59 09 12.0 V C40
2022-05-13 19:49:45 C 11 55 41.56 +59 09 11.0 V C40
2022-05-13 19:50:27 C 11 55 41.58 +59 09 10.1 V C40
2022-05-13 19:51:10 C 11 55 41.61 +59 09 09.2 V C40
2022-05-13 19:51:52 C 11 55 41.62 +59 09 08.3 V C40
2022-05-13 19:52:13 C 11 55 41.64 +59 09 07.8 V C40
2022-05-13 19:52:33 C 11 55 41.65 +59 09 07.3 V C40
2022-05-13 19:53:17 C 11 55 41.67 +59 09 06.4 V C40
2022-05-13 19:53:37 C 11 55 41.68 +59 09 05.9 V C40
2022-05-13 19:53:59 C 11 55 41.69 +59 09 05.5 V C40
2022-05-13 19:55:03 C 11 55 41.72 +59 09 04.1 V C40
2022-05-13 19:56:27 C 11 55 41.76 +59 09 02.3 V C40
2022-05-13 19:58:55 C 11 55 41.83 +59 08 59.0 V C40
2022-05-13 20:00:21 C 11 55 41.88 +59 08 57.2 V C40
2022-05-13 20:01:02 C 11 55 41.91 +59 08 56.3 V C40
2022-05-13 20:02:26 C 11 55 41.94 +59 08 54.4 V C40
2022-05-13 20:02:49 C 11 55 41.96 +59 08 53.9 V C40
2022-05-13 20:03:09 C 11 55 41.97 +59 08 53.5 V C40
2022-05-13 20:12:55 C 11 55 42.27 +59 08 40.7 V C40
2022-05-13 20:14:21 C 11 55 42.32 +59 08 38.8 V C40
2022-05-13 20:16:48 C 11 55 42.40 +59 08 35.6 V C40
2022-05-13 20:18:14 C 11 55 42.43 +59 08 33.7 V C40
2022-05-13 20:18:35 C 11 55 42.45 +59 08 33.3 V C40
2022-05-13 20:19:59 C 11 55 42.49 +59 08 31.4 V C40
2022-05-13 20:21:25 C 11 55 42.53 +59 08 29.5 V C40
2022-05-13 20:22:28 C 11 55 42.56 +59 08 28.1 V C40
2022-05-13 20:23:30 C 11 55 42.60 +59 08 26.8 V C40
2022-05-13 20:23:53 C 11 55 42.61 +59 08 26.3 V C40
2022-05-13 20:24:13 C 11 55 42.61 +59 08 25.9 V C40
2022-05-13 20:24:35 C 11 55 42.64 +59 08 25.4 V C40
2022-05-13 20:25:16 C 11 55 42.66 +59 08 24.5 V C40
2022-05-13 20:26:00 C 11 55 42.68 +59 08 23.5 V C40
2022-05-13 20:30:14 C 11 55 42.80 +59 08 17.9 V C40
2022-05-13 20:30:34 C 11 55 42.82 +59 08 17.5 V C40
2022-05-13 20:30:55 C 11 55 42.82 +59 08 17.1 V C40
2022-05-13 20:31:17 C 11 55 42.84 +59 08 16.6 V C40
2022-05-13 20:32:41 C 11 55 42.87 +59 08 14.7 V C40
2022-05-13 20:33:04 C 11 55 42.89 +59 08 14.2 V C40
2022-05-13 20:41:02 C 11 55 43.15 +59 08 03.7 V C40
2022-05-13 20:41:45 C 11 55 43.16 +59 08 02.8 V C40
2022-05-13 20:43:30 C 11 55 43.22 +59 08 00.5 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)