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
2022-06-20 20:02:10 C 12 37 09.30 +41 33 02.0 V C40
2022-06-21 22:22:13 C 12 38 33.50 +41 04 15.4 V C23
2022-06-21 22:24:23 C 12 38 33.64 +41 04 13.0 V C23
2022-06-21 22:26:32 C 12 38 33.71 +41 04 10.6 V C23
2022-06-22 18:08:13 C 12 39 37.24 +40 42 44.3 V C40
2022-06-22 18:17:47 C 12 39 37.71 +40 42 33.8 V C40
2022-06-22 18:27:23 C 12 39 38.21 +40 42 23.3 V C40
2022-06-22 18:28:03 C 12 39 38.24 +40 42 22.5 V C40
2022-06-22 18:35:35 C 12 39 38.63 +40 42 14.1 V C40
2022-06-22 18:39:00 C 12 39 38.81 +40 42 10.4 V C40
2022-06-22 18:42:27 C 12 39 38.98 +40 42 06.6 V C40
2022-06-22 18:43:07 C 12 39 39.01 +40 42 05.8 V C40
2022-06-22 18:45:51 C 12 39 39.15 +40 42 02.8 V C40
2022-06-22 18:48:55 C 12 39 39.31 +40 41 59.4 V C40
2022-06-22 18:51:00 C 12 39 39.42 +40 41 57.1 V C40
2022-06-22 18:52:22 C 12 39 39.49 +40 41 55.7 V C40
2022-06-22 18:53:02 C 12 39 39.52 +40 41 54.9 V C40
2022-06-22 18:53:43 C 12 39 39.56 +40 41 54.1 V C40
2022-06-22 18:57:50 C 12 39 39.78 +40 41 49.6 V C40
2022-06-22 18:59:12 C 12 39 39.84 +40 41 48.1 V C40
2022-06-22 19:01:16 C 12 39 39.95 +40 41 45.8 V C40
2022-06-22 19:02:38 C 12 39 40.02 +40 41 44.2 V C40
2022-06-22 19:04:01 C 12 39 40.10 +40 41 42.8 V C40
2022-06-22 19:04:41 C 12 39 40.12 +40 41 42.0 V C40
2022-06-22 19:08:06 C 12 39 40.31 +40 41 38.2 V C40
2022-06-22 19:08:48 C 12 39 40.34 +40 41 37.5 V C40
2022-06-22 19:10:50 C 12 39 40.45 +40 41 35.1 V C40
2022-06-22 19:13:35 C 12 39 40.59 +40 41 32.2 V C40
2022-06-22 19:17:42 C 12 39 40.79 +40 41 27.6 V C40
2022-06-22 19:18:23 C 12 39 40.83 +40 41 26.8 V C40
2022-06-22 19:22:29 C 12 39 41.05 +40 41 22.4 V C40
2022-06-22 19:24:34 C 12 39 41.15 +40 41 20.1 V C40
2022-06-22 19:25:14 C 12 39 41.18 +40 41 19.3 V C40
2022-06-22 19:26:36 C 12 39 41.26 +40 41 17.7 V C40
2022-06-22 19:27:18 C 12 39 41.29 +40 41 17.0 V C40
2022-06-22 19:27:59 C 12 39 41.33 +40 41 16.2 V C40
2022-06-22 19:29:21 C 12 39 41.41 +40 41 14.6 V C40
2022-06-23 02:54:55 C 12 40 05.32 +40 33 12.1 q W42
2022-06-23 03:05:38 C 12 40 05.87 +40 33 00.2 q W42
2022-06-23 03:16:21 C 12 40 06.41 +40 32 48.6 q W42
2022-06-23 07:11:03 C 12 40 19.219 +40 28 35.00 V T08
2022-06-23 07:15:03 C 12 40 19.428 +40 28 30.54 V T08
2022-06-23 07:24:21 C 12 40 19.896 +40 28 20.24 V T08
2022-06-23 07:48:20 C 12 40 21.115 +40 27 53.64 V T08
2022-06-24 02:03:59 C 12 41 20.39 +40 07 58.5 q W42
2022-06-24 02:09:10 C 12 41 20.66 +40 07 52.8 q W42
2022-06-24 02:16:57 C 12 41 21.10 +40 07 43.9 q W42
2022-06-24 20:59:26 C 12 42 21.989 +39 47 16.91 t A16
2022-06-24 21:20:15 C 12 42 23.251 +39 46 54.48 t A16
2022-06-24 21:41:23 C 12 42 24.197 +39 46 30.50 t A16
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)