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
2011-03-03 01:41:07 C 17 45 45.28 +04 47 47.1 – u 585
2011-03-03 01:45:08 C 17 45 45.57 +04 47 53.3 – u 585
2011-03-03 01:47:09 C 17 45 45.75 +04 47 56.0 – u 585
2011-03-03 01:49:10 C 17 45 45.91 +04 47 58.7 – u 585
2011-03-03 01:51:12 C 17 45 46.06 +04 48 01.5 – u 585
2011-03-03 01:53:13 C 17 45 46.23 +04 48 04.6 – u 585
2011-03-03 01:55:14 C 17 45 46.35 +04 48 07.7 – u 585
2011-03-03 01:57:16 C 17 45 46.53 +04 48 10.1 – u 585
2011-03-03 02:03:20 C 17 45 46.99 +04 48 18.8 – u 585
2011-03-03 02:05:21 C 17 45 47.14 +04 48 21.4 – u 585
2011-03-03 02:09:23 C 17 45 47.48 +04 48 27.3 – u 585
2011-03-03 02:11:24 C 17 45 47.63 +04 48 30.6 – u 585
2011-03-03 02:13:25 C 17 45 47.78 +04 48 33.3 – u 585
2011-03-03 02:17:28 C 17 45 48.08 +04 48 38.7 – u 585
2011-03-03 02:21:31 C 17 45 48.41 +04 48 44.8 – u 585
2011-03-03 02:25:33 C 17 45 48.69 +04 48 50.2 – u 585
2011-03-03 02:27:34 C 17 45 48.87 +04 48 53.6 – u 585
2011-03-03 02:29:36 C 17 45 48.99 +04 48 55.9 – u 585
2011-03-03 02:31:37 C 17 45 49.19 +04 48 59.3 – u 585
2011-03-03 02:33:38 C 17 45 49.31 +04 49 03.2 – u 585
2011-03-03 02:35:38 C 17 45 49.50 +04 49 05.3 – u 585
2011-03-03 02:37:39 C 17 45 49.64 +04 49 08.0 – u 585
2011-03-03 02:43:43 C 17 45 50.12 +04 49 16.4 – u 585
2011-03-03 02:53:50 C 17 45 50.88 +04 49 31.3 – u 585
2011-03-03 02:57:52 C 17 45 51.18 +04 49 37.0 – u 585
2011-03-03 02:59:53 C 17 45 51.36 +04 49 39.7 – u 585
2011-03-03 03:03:55 C 17 45 51.65 +04 49 45.6 – u 585
2011-03-03 03:05:56 C 17 45 51.81 +04 49 48.0 – u 585
2011-03-03 03:07:57 C 17 45 51.97 +04 49 50.8 – u 585
2011-03-03 03:14:02 C 17 45 52.43 +04 49 59.7 – u 585
2011-03-03 03:16:03 C 17 45 52.60 +04 50 02.7 – u 585
2011-03-03 03:18:04 C 17 45 52.75 +04 50 05.6 – u 585
2011-03-03 03:20:05 C 17 45 52.88 +04 50 08.6 – u 585
2011-03-03 03:26:09 C 17 45 53.37 +04 50 16.9 – u 585
2011-03-03 03:28:09 C 17 45 53.52 +04 50 19.9 – u 585
2011-03-03 03:30:10 C 17 45 53.67 +04 50 22.5 – u 585
2011-03-03 03:32:12 C 17 45 53.84 +04 50 25.5 – u 585
2011-03-03 03:34:13 C 17 45 53.97 +04 50 28.6 – u 585
2011-03-03 03:38:15 C 17 45 54.28 +04 50 34.6 – u 585
2011-03-03 03:40:16 C 17 45 54.46 +04 50 37.4 – u 585
2011-03-03 03:42:19 C 17 45 54.61 +04 50 39.9 – u 585
2011-03-03 03:44:20 C 17 45 54.73 +04 50 43.0 – u 585
2011-03-03 10:53:05 C 17 46 28.88 +05 00 57.6 – r H10
2011-03-03 10:55:57 C 17 46 29.08 +05 01 00.9 – r H10
2011-03-04 10:51:59 C 17 48 21.78 +05 35 14.7 – r H10
2011-03-04 11:26:19 C 17 48 24.38 +05 36 03.9 – r H10
2011-03-09 22:50:20 C 17 58 28.285 +08 46 32.95 – r 168
2011-03-09 22:57:00 C 17 58 28.795 +08 46 42.90 – r 168
2011-03-10 00:10:30 C 17 58 34.182 +08 48 30.71 – r 168
2011-03-10 00:13:00 C 17 58 34.388 +08 48 34.72 – r 168
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)