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
2022-04-24 20:33:33 C 11 42 15.75 +70 15 26.1 V C40
2022-04-24 20:33:55 C 11 42 15.75 +70 15 25.5 V C40
2022-04-24 20:34:59 C 11 42 15.76 +70 15 23.7 V C40
2022-04-24 20:35:19 C 11 42 15.75 +70 15 23.1 V C40
2022-04-24 20:35:40 C 11 42 15.77 +70 15 22.5 V C40
2022-04-24 20:36:02 C 11 42 15.78 +70 15 21.9 V C40
2022-04-24 20:36:23 C 11 42 15.77 +70 15 21.2 V C40
2022-04-24 20:37:06 C 11 42 15.79 +70 15 20.0 V C40
2022-04-24 21:02:51 C 11 42 16.10 +70 14 35.1 V C40
2022-04-24 21:03:11 C 11 42 16.09 +70 14 34.5 V C40
2022-04-24 21:03:55 C 11 42 16.12 +70 14 33.1 V C40
2022-04-24 21:04:37 C 11 42 16.11 +70 14 32.0 V C40
2022-04-24 21:05:41 C 11 42 16.11 +70 14 30.1 V C40
2022-04-24 21:06:02 C 11 42 16.15 +70 14 29.4 V C40
2022-04-24 21:06:22 C 11 42 16.13 +70 14 28.9 V C40
2022-04-25 06:11:59 C 11 42 29.059 +69 59 01.00 V 703
2022-04-25 06:19:42 C 11 42 29.131 +69 58 47.71 V 703
2022-04-25 06:35:10 C 11 42 29.279 +69 58 21.00 V 703
2022-04-25 20:33:29 C 11 42 49.10 +69 34 39.6 V C40
2022-04-25 20:34:54 C 11 42 49.10 +69 34 37.3 V C40
2022-04-25 20:35:14 C 11 42 49.11 +69 34 36.6 V C40
2022-04-25 20:35:36 C 11 42 49.10 +69 34 36.0 V C40
2022-04-25 20:35:57 C 11 42 49.13 +69 34 35.5 V C40
2022-04-25 20:36:38 C 11 42 49.13 +69 34 34.2 V C40
2022-04-25 20:37:01 C 11 42 49.14 +69 34 33.6 V C40
2022-04-25 20:37:43 C 11 42 49.13 +69 34 32.4 V C40
2022-04-25 20:38:04 C 11 42 49.16 +69 34 31.9 V C40
2022-04-25 20:38:25 C 11 42 49.17 +69 34 31.2 V C40
2022-04-25 20:38:47 C 11 42 49.15 +69 34 30.7 V C40
2022-04-25 20:39:08 C 11 42 49.16 +69 34 30.0 V C40
2022-04-25 20:41:15 C 11 42 49.20 +69 34 26.4 V C40
2022-04-25 20:42:39 C 11 42 49.20 +69 34 24.0 V C40
2022-04-25 20:43:02 C 11 42 49.20 +69 34 23.4 V C40
2022-04-25 20:43:43 C 11 42 49.24 +69 34 22.1 V C40
2022-04-25 20:48:27 C 11 42 49.29 +69 34 14.0 V C40
2022-04-25 20:49:09 C 11 42 49.30 +69 34 12.9 V C40
2022-04-25 20:49:50 C 11 42 49.29 +69 34 11.6 V C40
2022-04-25 20:50:54 C 11 42 49.31 +69 34 09.8 V C40
2022-04-25 20:51:58 C 11 42 49.34 +69 34 08.0 V C40
2022-04-25 20:52:41 C 11 42 49.35 +69 34 06.8 V C40
2022-04-25 20:53:23 C 11 42 49.35 +69 34 05.7 V C40
2022-04-25 20:54:04 C 11 42 49.38 +69 34 04.4 V C40
2022-04-25 20:55:51 C 11 42 49.40 +69 34 01.5 V C40
2022-04-25 20:56:34 C 11 42 49.40 +69 34 00.1 V C40
2022-04-25 20:56:55 C 11 42 49.40 +69 33 59.6 V C40
2022-04-25 20:57:16 C 11 42 49.41 +69 33 59.1 V C40
2022-04-25 20:58:41 C 11 42 49.44 +69 33 56.6 V C40
2022-04-25 21:01:47 C 11 42 49.46 +69 33 51.2 V C40
2022-04-25 21:02:09 C 11 42 49.48 +69 33 50.6 V C40
2022-04-25 21:02:31 C 11 42 49.47 +69 33 50.0 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)