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
2022-04-26 20:14:09 C 11 43 23.10 +68 55 17.5 V C40
2022-04-26 20:17:41 C 11 43 23.15 +68 55 11.6 V C40
2022-04-26 20:19:07 C 11 43 23.18 +68 55 09.2 V C40
2022-04-26 20:19:27 C 11 43 23.18 +68 55 08.6 V C40
2022-04-26 20:19:48 C 11 43 23.20 +68 55 08.0 V C40
2022-04-26 20:20:10 C 11 43 23.20 +68 55 07.4 V C40
2022-04-26 20:30:22 C 11 43 23.33 +68 54 50.5 V C40
2022-04-26 20:31:26 C 11 43 23.35 +68 54 48.7 V C40
2022-04-26 20:31:48 C 11 43 23.35 +68 54 48.0 V C40
2022-04-26 20:32:09 C 11 43 23.35 +68 54 47.5 V C40
2022-04-26 20:32:30 C 11 43 23.36 +68 54 46.9 V C40
2022-04-26 20:33:12 C 11 43 23.39 +68 54 45.7 V C40
2022-04-26 20:33:56 C 11 43 23.39 +68 54 44.4 V C40
2022-04-26 20:34:16 C 11 43 23.39 +68 54 43.9 V C40
2022-04-26 20:34:37 C 11 43 23.38 +68 54 43.4 V C40
2022-04-26 20:36:23 C 11 43 23.42 +68 54 40.3 V C40
2022-04-26 20:36:44 C 11 43 23.41 +68 54 39.7 V C40
2022-04-26 20:37:06 C 11 43 23.44 +68 54 39.2 V C40
2022-04-26 20:37:26 C 11 43 23.42 +68 54 38.6 V C40
2022-04-26 20:37:47 C 11 43 23.42 +68 54 38.1 V C40
2022-04-26 20:38:10 C 11 43 23.45 +68 54 37.4 V C40
2022-04-26 20:38:51 C 11 43 23.46 +68 54 36.2 V C40
2022-04-26 20:39:14 C 11 43 23.46 +68 54 35.6 V C40
2022-04-26 20:39:34 C 11 43 23.45 +68 54 35.1 V C40
2022-04-26 20:39:55 C 11 43 23.48 +68 54 34.5 V C40
2022-04-26 20:40:38 C 11 43 23.46 +68 54 33.2 V C40
2022-04-26 21:06:33 C 11 43 23.84 +68 53 49.9 V C40
2022-04-26 21:07:14 C 11 43 23.87 +68 53 48.7 V C40
2022-04-26 21:07:37 C 11 43 23.87 +68 53 48.1 V C40
2022-04-26 21:07:57 C 11 43 23.87 +68 53 47.5 V C40
2022-04-26 21:08:40 C 11 43 23.88 +68 53 46.3 V C40
2022-04-26 22:35:11 C 11 43 26.49 +68 51 23.5 V C23
2022-04-26 22:40:22 C 11 43 26.56 +68 51 14.9 V C23
2022-04-26 22:45:00 C 11 43 26.63 +68 51 07.2 V C23
2022-04-27 02:08:09 C 11 43 29.99 +68 45 26.2 V L63
2022-04-27 02:28:34 C 11 43 30.46 +68 44 51.5 V L63
2022-04-27 02:48:25 C 11 43 30.92 +68 44 17.8 V L63
2022-04-27 19:42:49 C 11 43 57.82 +68 17 02.1 V C40
2022-04-27 19:43:11 C 11 43 57.84 +68 17 01.6 V C40
2022-04-27 19:43:53 C 11 43 57.85 +68 17 00.4 V C40
2022-04-27 19:44:15 C 11 43 57.85 +68 16 59.8 V C40
2022-04-27 19:49:10 C 11 43 57.93 +68 16 52.0 V C40
2022-04-27 19:51:46 C 11 43 57.97 +68 16 47.7 V C40
2022-04-27 19:52:07 C 11 43 57.95 +68 16 47.3 V C40
2022-04-28 00:20:53 C 11 44 03.29 +68 09 29.6 q M16
2022-04-28 00:43:43 C 11 44 03.73 +68 08 51.9 q M16
2022-04-28 01:06:33 C 11 44 04.21 +68 08 14.2 q M16
2022-04-29 05:56:20 C 11 44 49.405 +67 22 36.52 V 703
2022-04-29 06:03:32 C 11 44 49.510 +67 22 25.07 V 703
2022-04-29 06:10:45 C 11 44 49.614 +67 22 13.55 V 703
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)