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
2011-03-02 00:57:27 C 17 43 47.87 +04 12 37.5 – u 585
2011-03-02 00:58:16 C 17 43 47.93 +04 12 38.6 – u 585
2011-03-02 00:59:12 C 17 43 48.00 +04 12 40.1 – u 585
2011-03-02 01:01:28 C 17 43 48.18 +04 12 43.3 – u 585
2011-03-02 01:06:50 C 17 43 48.62 +04 12 51.2 – u 585
2011-03-02 01:09:53 C 17 43 48.82 +04 12 54.8 – u 585
2011-03-02 01:11:54 C 17 43 49.00 +04 12 58.0 – u 585
2011-03-02 01:13:56 C 17 43 49.15 +04 13 01.3 – u 585
2011-03-02 01:15:56 C 17 43 49.32 +04 13 04.0 – u 585
2011-03-02 01:24:02 C 17 43 49.95 +04 13 15.3 – u 585
2011-03-02 01:26:03 C 17 43 50.10 +04 13 18.3 – u 585
2011-03-02 01:30:06 C 17 43 50.41 +04 13 24.0 – u 585
2011-03-02 01:32:07 C 17 43 50.57 +04 13 26.4 – u 585
2011-03-02 01:40:11 C 17 43 51.19 +04 13 38.0 – u 585
2011-03-02 01:42:14 C 17 43 51.36 +04 13 41.3 – u 585
2011-03-02 01:46:16 C 17 43 51.68 +04 13 46.8 – u 585
2011-03-02 01:48:17 C 17 43 51.83 +04 13 49.8 – u 585
2011-03-02 01:54:21 C 17 43 52.30 +04 13 58.5 – u 585
2011-03-02 02:06:26 C 17 43 53.25 +04 14 15.8 – u 585
2011-03-02 02:08:28 C 17 43 53.39 +04 14 18.6 – u 585
2011-03-02 02:22:37 C 17 43 54.49 +04 14 38.4 – u 585
2011-03-02 02:26:38 C 17 43 54.83 +04 14 44.5 – u 585
2011-03-02 02:28:39 C 17 43 54.96 +04 14 47.2 – u 585
2011-03-02 02:30:40 C 17 43 55.14 +04 14 50.2 – u 585
2011-03-02 02:32:42 C 17 43 55.28 +04 14 52.7 – u 585
2011-03-02 02:34:43 C 17 43 55.43 +04 14 55.9 – u 585
2011-03-02 02:36:44 C 17 43 55.58 +04 14 58.5 – u 585
2011-03-02 02:40:47 C 17 43 55.92 +04 15 04.5 – u 585
2011-03-02 02:42:48 C 17 43 56.05 +04 15 07.1 – u 585
2011-03-02 02:44:50 C 17 43 56.20 +04 15 10.2 – u 585
2011-03-02 02:46:52 C 17 43 56.39 +04 15 13.1 – u 585
2011-03-02 02:48:52 C 17 43 56.52 +04 15 15.9 – u 585
2011-03-02 02:50:53 C 17 43 56.71 +04 15 18.7 – u 585
2011-03-02 03:02:59 C 17 43 57.64 +04 15 35.8 – u 585
2011-03-02 03:05:02 C 17 43 57.83 +04 15 39.0 – u 585
2011-03-02 03:09:04 C 17 43 58.07 +04 15 44.5 – u 585
2011-03-03 01:01:33 C 17 45 42.20 +04 46 50.9 – u 585
2011-03-03 01:04:31 C 17 45 42.41 +04 46 55.1 – u 585
2011-03-03 01:05:07 C 17 45 42.48 +04 46 55.9 – u 585
2011-03-03 01:06:47 C 17 45 42.61 +04 46 58.4 – u 585
2011-03-03 01:10:49 C 17 45 42.93 +04 47 04.2 – u 585
2011-03-03 01:12:50 C 17 45 43.08 +04 47 06.4 – u 585
2011-03-03 01:20:54 C 17 45 43.71 +04 47 18.1 – u 585
2011-03-03 01:24:56 C 17 45 44.02 +04 47 24.0 – u 585
2011-03-03 01:26:57 C 17 45 44.17 +04 47 27.1 – u 585
2011-03-03 01:31:01 C 17 45 44.49 +04 47 32.9 – u 585
2011-03-03 01:33:02 C 17 45 44.64 +04 47 35.8 – u 585
2011-03-03 01:35:03 C 17 45 44.80 +04 47 38.9 – u 585
2011-03-03 01:37:04 C 17 45 44.96 +04 47 41.2 – u 585
2011-03-03 01:39:05 C 17 45 45.13 +04 47 44.1 – u 585
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)