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
2022-06-25 07:16:29 C 12 42 55.548 +39 36 09.25 V T05
2022-06-25 07:21:08 C 12 42 55.781 +39 36 04.14 V T05
2022-06-25 07:29:44 C 12 42 56.230 +39 35 54.56 V T05
2022-06-25 07:45:00 C 12 42 57.024 +39 35 37.68 V T05
2022-06-25 22:52:45 C 12 43 46.54 +39 19 02.0 t B66
2022-06-25 23:27:01 C 12 43 48.38 +39 18 24.0 t B66
2022-06-27 06:28:46 C 12 45 30.876 +38 44 44.38 V T08
2022-06-27 06:34:51 C 12 45 31.164 +38 44 37.93 V T08
2022-06-27 06:44:09 C 12 45 31.654 +38 44 27.74 V T08
2022-06-27 07:16:43 C 12 45 33.360 +38 43 51.71 V T08
2022-06-27 22:19:48 C 12 46 23.17 +38 27 20.9 V C23
2022-06-27 22:49:14 C 12 46 24.76 +38 26 48.4 V C23
2022-06-28 18:46:47 C 12 47 31.25 +38 05 06.5 V C40
2022-06-28 18:48:50 C 12 47 31.35 +38 05 04.2 V C40
2022-06-28 18:52:17 C 12 47 31.54 +38 05 00.4 V C40
2022-06-28 18:53:39 C 12 47 31.61 +38 04 59.0 V C40
2022-06-28 19:00:29 C 12 47 31.97 +38 04 51.3 V C40
2022-06-28 19:14:52 C 12 47 32.75 +38 04 35.4 V C40
2022-06-28 19:51:21 C 12 47 34.71 +38 03 54.9 V C40
2022-06-28 20:01:38 C 12 47 35.26 +38 03 43.6 V C40
2022-06-28 20:07:07 C 12 47 35.57 +38 03 37.5 V C40
2022-06-28 20:08:28 C 12 47 35.64 +38 03 35.9 V C40
2022-06-28 20:18:04 C 12 47 36.16 +38 03 25.3 V C40
2022-06-29 18:31:46 C 12 48 50.56 +37 39 14.9 V C40
2022-06-29 18:33:50 C 12 48 50.68 +37 39 12.6 V C40
2022-06-29 18:46:11 C 12 48 51.34 +37 38 59.0 V C40
2022-06-29 19:00:34 C 12 48 52.12 +37 38 43.0 V C40
2022-06-29 19:02:38 C 12 48 52.23 +37 38 40.8 V C40
2022-06-29 19:10:10 C 12 48 52.64 +37 38 32.5 V C40
2022-06-29 19:12:55 C 12 48 52.78 +37 38 29.5 V C40
2022-06-29 19:13:35 C 12 48 52.82 +37 38 28.6 V C40
2022-06-29 19:28:05 C 12 48 53.61 +37 38 12.6 V C40
2022-06-29 19:28:45 C 12 48 53.64 +37 38 11.9 V C40
2022-06-29 19:33:34 C 12 48 53.90 +37 38 06.6 V C40
2022-06-29 19:34:14 C 12 48 53.95 +37 38 05.9 V C40
2022-06-29 19:36:18 C 12 48 54.06 +37 38 03.6 V C40
2022-06-29 19:38:21 C 12 48 54.17 +37 38 01.3 V C40
2022-06-29 19:39:01 C 12 48 54.20 +37 38 00.6 V C40
2022-06-29 19:39:44 C 12 48 54.24 +37 37 59.8 V C40
2022-06-29 19:44:30 C 12 48 54.50 +37 37 54.5 V C40
2022-06-29 19:58:12 C 12 48 55.25 +37 37 39.4 V C40
2022-06-29 19:58:54 C 12 48 55.29 +37 37 38.6 V C40
2022-06-29 20:04:23 C 12 48 55.58 +37 37 32.4 V C40
2022-06-29 20:07:07 C 12 48 55.74 +37 37 29.4 V C40
2022-06-29 20:36:16 C 12 48 57.49 +37 36 59.5 X L63
2022-06-29 20:45:48 C 12 48 58.03 +37 36 48.9 X L63
2022-06-29 20:54:48 C 12 48 58.51 +37 36 38.8 X L63
2022-06-30 18:09:44 C 12 50 09.99 +37 13 30.8 V C40
2022-06-30 18:52:43 C 12 50 12.27 +37 12 43.3 V C40
2022-06-30 18:54:46 C 12 50 12.38 +37 12 41.0 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)