IAA RAS IAA Minor Planet Database

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
2022-05-10 20:48:03 C 11 53 11.87 +60 42 03.1 – V C40
2022-05-10 20:48:14 C 11 53 11.86 +60 42 02.9 – V C40
2022-05-10 20:49:43 C 11 53 11.90 +60 42 00.8 – V C40
2022-05-10 20:50:40 C 11 53 11.93 +60 41 59.6 – V C40
2022-05-10 20:51:12 C 11 53 11.94 +60 41 58.8 – V C40
2022-05-10 20:51:24 C 11 53 11.96 +60 41 58.6 – V C40
2022-05-10 20:52:09 C 11 53 11.99 +60 41 57.6 – V C40
2022-05-10 21:17:09 C 11 53 12.72 +60 41 23.6 – V C40
2022-05-10 21:17:20 C 11 53 12.72 +60 41 23.3 – V C40
2022-05-10 21:17:30 C 11 53 12.73 +60 41 23.0 – V C40
2022-05-10 21:17:41 C 11 53 12.72 +60 41 22.9 – V C40
2022-05-10 21:17:53 C 11 53 12.73 +60 41 22.6 – V C40
2022-05-10 21:18:05 C 11 53 12.73 +60 41 22.3 – V C40
2022-05-10 21:18:16 C 11 53 12.72 +60 41 22.1 – V C40
2022-05-10 21:18:26 C 11 53 12.75 +60 41 21.8 – V C40
2022-05-10 21:18:38 C 11 53 12.75 +60 41 21.5 – V C40
2022-05-10 21:19:11 C 11 53 12.77 +60 41 20.8 – V C40
2022-05-10 21:19:34 C 11 53 12.79 +60 41 20.3 – V C40
2022-05-10 21:19:55 C 11 53 12.79 +60 41 19.8 – V C40
2022-05-10 21:20:07 C 11 53 12.81 +60 41 19.6 – V C40
2022-05-10 21:20:18 C 11 53 12.79 +60 41 19.3 – V C40
2022-05-10 21:20:28 C 11 53 12.80 +60 41 19.0 – V C40
2022-05-10 21:20:40 C 11 53 12.81 +60 41 18.9 – V C40
2022-05-10 21:20:51 C 11 53 12.81 +60 41 18.5 – V C40
2022-05-10 21:21:24 C 11 53 12.84 +60 41 17.8 – V C40
2022-05-10 21:21:36 C 11 53 12.83 +60 41 17.6 – V C40
2022-05-10 21:21:47 C 11 53 12.84 +60 41 17.3 – V C40
2022-05-10 21:21:59 C 11 53 12.85 +60 41 17.0 – V C40
2022-05-10 21:22:09 C 11 53 12.85 +60 41 16.8 – V C40
2022-05-10 21:22:20 C 11 53 12.87 +60 41 16.6 – V C40
2022-05-10 21:22:32 C 11 53 12.88 +60 41 16.3 – V C40
2022-05-10 21:23:17 C 11 53 12.90 +60 41 15.2 – V C40
2022-05-10 21:23:29 C 11 53 12.90 +60 41 15.0 – V C40
2022-05-10 21:23:40 C 11 53 12.91 +60 41 14.8 – V C40
2022-05-10 21:24:59 C 11 53 12.94 +60 41 13.0 – V C40
2022-05-10 21:25:55 C 11 53 12.98 +60 41 11.6 – V C40
2022-05-10 21:26:06 C 11 53 12.96 +60 41 11.5 – V C40
2022-05-10 21:26:16 C 11 53 12.98 +60 41 11.2 – V C40
2022-05-10 21:26:28 C 11 53 12.98 +60 41 11.0 – V C40
2022-05-10 21:26:51 C 11 53 12.99 +60 41 10.4 – V C40
2022-05-10 21:27:01 C 11 53 12.99 +60 41 10.2 – V C40
2022-05-10 21:27:24 C 11 53 13.00 +60 41 09.7 – V C40
2022-05-10 21:27:35 C 11 53 13.02 +60 41 09.5 – V C40
2022-05-10 21:27:46 C 11 53 13.01 +60 41 09.2 – V C40
2022-05-10 21:27:57 C 11 53 13.02 +60 41 08.9 – V C40
2022-05-10 21:45:54 C 11 53 14.26 +60 40 48.0 – q M16
2022-05-10 22:08:08 C 11 53 14.85 +60 40 17.7 – q M16
2022-05-10 22:17:35 C 11 53 14.54 +60 40 01.2 – V C40
2022-05-10 22:18:08 C 11 53 14.55 +60 40 00.5 – V C40
2022-05-10 22:18:20 C 11 53 14.56 +60 40 00.2 – 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)