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
2022-05-11 06:02:53 C 11 53 30.984 +60 29 51.47 – V 703
2022-05-11 06:10:44 C 11 53 31.193 +60 29 40.88 – V 703
2022-05-11 06:18:34 C 11 53 31.412 +60 29 30.30 – V 703
2022-05-11 20:44:57 C 11 54 01.39 +60 10 24.5 – V C40
2022-05-11 20:45:08 C 11 54 01.37 +60 10 24.3 – V C40
2022-05-11 20:46:37 C 11 54 01.43 +60 10 22.2 – V C40
2022-05-11 20:46:58 C 11 54 01.44 +60 10 21.8 – V C40
2022-05-11 20:47:55 C 11 54 01.46 +60 10 20.5 – V C40
2022-05-11 20:48:06 C 11 54 01.47 +60 10 20.2 – V C40
2022-05-11 20:48:16 C 11 54 01.47 +60 10 20.1 – V C40
2022-05-11 20:48:51 C 11 54 01.48 +60 10 19.3 – V C40
2022-05-11 20:49:01 C 11 54 01.49 +60 10 19.0 – V C40
2022-05-11 20:49:36 C 11 54 01.52 +60 10 18.3 – V C40
2022-05-11 20:49:47 C 11 54 01.51 +60 10 18.0 – V C40
2022-05-11 20:49:58 C 11 54 01.53 +60 10 17.7 – V C40
2022-05-11 20:50:09 C 11 54 01.52 +60 10 17.5 – V C40
2022-05-11 20:50:32 C 11 54 01.54 +60 10 17.0 – V C40
2022-05-11 20:51:06 C 11 54 01.56 +60 10 16.3 – V C40
2022-05-11 20:52:12 C 11 54 01.58 +60 10 14.7 – V C40
2022-05-11 20:52:46 C 11 54 01.60 +60 10 14.0 – V C40
2022-05-11 20:52:58 C 11 54 01.61 +60 10 13.7 – V C40
2022-05-11 20:53:08 C 11 54 01.61 +60 10 13.6 – V C40
2022-05-11 20:53:19 C 11 54 01.63 +60 10 13.3 – V C40
2022-05-11 20:53:31 C 11 54 01.62 +60 10 13.0 – V C40
2022-05-11 20:53:42 C 11 54 01.64 +60 10 12.7 – V C40
2022-05-11 20:53:53 C 11 54 01.63 +60 10 12.5 – V C40
2022-05-11 20:55:01 C 11 54 01.68 +60 10 11.1 – V C40
2022-05-11 20:55:34 C 11 54 01.69 +60 10 10.3 – V C40
2022-05-11 20:55:45 C 11 54 01.68 +60 10 10.0 – V C40
2022-05-11 21:01:05 C 11 54 01.86 +60 10 02.8 – V C40
2022-05-11 21:02:13 C 11 54 01.89 +60 10 01.3 – V C40
2022-05-11 21:02:57 C 11 54 01.91 +60 10 00.4 – V C40
2022-05-11 21:03:19 C 11 54 01.93 +60 09 59.8 – V C40
2022-05-11 21:03:30 C 11 54 01.92 +60 09 59.6 – V C40
2022-05-11 21:04:59 C 11 54 01.98 +60 09 57.6 – V C40
2022-05-11 21:05:11 C 11 54 01.97 +60 09 57.4 – V C40
2022-05-11 21:05:34 C 11 54 01.99 +60 09 56.8 – V C40
2022-05-11 21:05:44 C 11 54 01.99 +60 09 56.6 – V C40
2022-05-11 21:07:24 C 11 54 02.03 +60 09 54.4 – V C40
2022-05-11 21:07:37 C 11 54 02.06 +60 09 54.1 – V C40
2022-05-11 21:07:48 C 11 54 02.05 +60 09 53.9 – V C40
2022-05-11 21:09:06 C 11 54 02.08 +60 09 52.1 – V C40
2022-05-11 21:09:29 C 11 54 02.11 +60 09 51.6 – V C40
2022-05-11 21:09:39 C 11 54 02.10 +60 09 51.4 – V C40
2022-05-11 21:10:03 C 11 54 02.12 +60 09 50.8 – V C40
2022-05-11 21:25:12 C 11 54 02.57 +60 09 30.5 – V C40
2022-05-11 21:25:23 C 11 54 02.60 +60 09 30.2 – V C40
2022-05-11 21:25:35 C 11 54 02.59 +60 09 29.9 – V C40
2022-05-11 21:27:26 C 11 54 02.65 +60 09 27.4 – V C40
2022-05-11 21:27:38 C 11 54 02.65 +60 09 27.2 – 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)