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
2025-06-11 21:16:36 B 13 10 44.24 +51 11 56.2 X L76
2025-06-11 21:19:45 B 13 10 44.19 +51 11 52.4 X L76
2025-06-11 21:42:16 C 13 10 44.285 +51 11 29.26 Z C23
2025-06-11 22:30:22 B 13 10 43.642 +51 10 34.21 W Z80
2025-06-11 22:31:53 C 13 10 43.53 +51 10 32.3 V D48
2025-06-11 22:34:02 C 13 10 43.50 +51 10 29.9 V D48
2025-06-11 22:35:25 B 13 10 43.606 +51 10 28.38 W Z80
2025-06-11 22:38:53 C 13 10 43.44 +51 10 24.4 V D48
2025-06-11 22:40:29 B 13 10 43.522 +51 10 22.73 W Z80
2025-06-11 22:41:02 C 13 10 43.41 +51 10 21.6 V D48
2025-06-11 22:41:05 C 13 10 43.426 +51 10 21.47 Z C23
2025-06-11 23:26:30 C 13 10 42.828 +51 09 29.09 Z C23
2025-06-12 16:30:54 B 13 10 32.866 +50 50 19.10 W M73
2025-06-12 16:36:14 B 13 10 32.820 +50 50 13.16 W M73
2025-06-12 16:41:32 B 13 10 32.731 +50 50 07.08 W M73
2025-06-12 22:44:31 C 13 10 28.956 +50 43 13.76 V R17
2025-06-12 23:04:34 C 13 10 28.637 +50 42 50.33 V R17
2025-06-12 23:24:28 C 13 10 28.414 +50 42 27.79 V R17
2025-06-12 23:44:37 C 13 10 28.159 +50 42 03.85 V R17
2025-06-13 03:48:38 C 13 10 26.681 +50 37 28.96 V G96
2025-06-13 03:57:03 C 13 10 26.562 +50 37 19.38 V G96
2025-06-13 04:05:28 C 13 10 26.458 +50 37 09.73 V G96
2025-06-13 04:13:53 C 13 10 26.346 +50 37 00.12 V G96
2025-06-13 07:31:11 C 13 10 24.590 +50 33 18.61 V T05
2025-06-13 07:35:49 C 13 10 24.523 +50 33 13.28 V T05
2025-06-13 07:45:12 C 13 10 24.391 +50 33 02.48 V T05
2025-06-13 08:06:00 C 13 10 24.110 +50 32 38.51 V T05
2025-06-13 20:40:47 C 13 10 18.27 +50 18 14.3 X C40
2025-06-13 20:43:12 C 13 10 18.23 +50 18 11.7 X C40
2025-06-13 20:45:25 C 13 10 18.22 +50 18 09.0 X C40
2025-06-13 20:47:37 C 13 10 18.20 +50 18 06.4 X C40
2025-06-13 20:49:50 C 13 10 18.17 +50 18 03.9 X C40
2025-06-13 20:52:03 C 13 10 18.16 +50 18 01.3 X C40
2025-06-13 20:54:15 C 13 10 18.14 +50 17 58.8 X C40
2025-06-13 20:56:28 C 13 10 18.11 +50 17 56.2 X C40
2025-06-13 20:58:39 C 13 10 18.10 +50 17 53.5 X C40
2025-06-13 21:00:52 C 13 10 18.08 +50 17 50.9 X C40
2025-06-13 21:03:05 C 13 10 18.05 +50 17 48.5 X C40
2025-06-13 21:05:12 C 13 10 18.04 +50 17 46.0 X C40
2025-06-13 21:46:04 C 13 10 17.67 +50 16 58.3 X D04
2025-06-13 21:50:56 C 13 10 17.67 +50 16 52.1 X D04
2025-06-13 21:55:49 C 13 10 17.54 +50 16 46.3 X D04
2025-06-13 22:00:41 C 13 10 17.53 +50 16 41.9 X D04
2025-06-13 22:05:18 C 13 10 17.58 +50 16 35.9 X D04
2025-06-13 22:09:39 C 13 10 17.49 +50 16 30.6 X D04
2025-06-13 22:12:02 C 13 10 17.79 +50 16 30.7 V D48
2025-06-13 22:13:59 C 13 10 17.40 +50 16 25.4 X D04
2025-06-13 22:18:19 C 13 10 17.40 +50 16 21.0 X D04
2025-06-13 22:22:16 C 13 10 17.69 +50 16 18.8 V D48
2025-06-13 22:22:39 C 13 10 17.36 +50 16 16.6 X D04
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)