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
2005-04-02 00:38:33 C 17 55 49.06 +45 29 14.2 – d 557
2005-04-02 01:08:20 C 17 55 46.40 +45 30 26.0 – d 557
2005-04-02 01:35:50 C 17 55 43.93 +45 31 32.4 – d 557
2005-04-02 02:05:38 C 17 55 41.25 +45 32 43.7 – d 557
2005-04-02 02:35:25 C 17 55 38.54 +45 33 55.2 – d 557
2005-04-02 03:00:55 C 17 55 36.21 +45 34 56.4 – d 557
2005-04-02 06:02:38 C 17 55 21.72 +45 41 59.9 – c 750
2005-04-02 06:08:11 C 17 55 21.25 +45 42 13.0 – c 750
2005-04-02 06:17:16 C 17 55 20.46 +45 42 34.9 – c 750
2005-04-02 06:34:51 C 17 55 18.92 +45 43 17.4 – c 750
2005-04-02 21:50:05 C 17 53 59.03 +46 19 00.2 – d 557
2005-04-02 22:50:38 C 17 53 53.66 +46 21 24.2 – d 557
2005-04-02 23:50:02 C 17 53 48.26 +46 23 45.2 – d 557
2005-04-03 01:51:10 C 17 53 36.98 +46 28 31.3 – d 557
2005-04-03 02:50:42 C 17 53 31.32 +46 30 50.7 – d 557
2005-04-03 21:15:14 C 17 51 51.77 +47 12 58.2 – d 557
2005-04-03 22:16:59 C 17 51 46.06 +47 15 21.8 – d 557
2005-04-03 23:16:23 C 17 51 40.47 +47 17 40.0 – d 557
2005-04-04 00:13:24 C 17 51 35.01 +47 19 52.1 – d 557
2005-04-04 01:15:10 C 17 51 28.98 +47 22 14.6 – d 557
2005-04-04 02:16:54 C 17 51 22.89 +47 24 36.3 – d 557
2005-04-04 03:02:02 C 17 51 18.40 +47 26 19.3 – d 557
2005-04-04 05:00:43 C 17 51 08.51 +47 30 38.5 – c 750
2005-04-04 05:08:41 C 17 51 07.72 +47 30 56.7 – c 750
2005-04-04 05:42:42 C 17 51 04.48 +47 32 15.5 – c 750
2005-04-04 17:12:39 C 17 49 58.34 +47 58 17.3 – o 379
2005-04-04 17:13:48 C 17 49 58.21 +47 58 20.2 – o 379
2005-04-04 17:14:57 C 17 49 58.10 +47 58 22.9 – o 379
2005-04-04 17:16:05 C 17 49 57.96 +47 58 25.3 – o 379
2005-04-04 17:18:23 C 17 49 57.74 +47 58 30.2 – o 379
2005-04-04 17:19:33 C 17 49 57.64 +47 58 33.0 – o 379
2005-04-04 17:20:42 C 17 49 57.50 +47 58 35.8 – o 379
2005-04-04 17:21:51 C 17 49 57.41 +47 58 38.5 – o 379
2005-04-04 21:02:27 C 17 49 36.38 +48 06 33.0 – d 557
2005-04-04 22:02:16 C 17 49 30.61 +48 08 49.0 – d 557
2005-04-04 22:58:33 C 17 49 25.08 +48 10 57.0 – d 557
2005-04-05 00:03:12 C 17 49 18.61 +48 13 23.3 – d 557
2005-04-05 00:55:28 C 17 49 13.28 +48 15 21.4 – d 557
2005-04-05 01:46:30 C 17 49 07.55 +48 17 13.4 – o 084
2005-04-05 01:48:28 C 17 49 07.34 +48 17 17.8 – o 084
2005-04-05 02:02:00 C 17 49 06.43 +48 17 50.5 – d 557
2005-04-05 03:01:22 C 17 49 00.24 +48 20 03.1 – d 557
2005-04-05 14:58:58 C 17 47 50.39 +48 46 17.9 – o 379
2005-04-05 15:03:03 C 17 47 49.97 +48 46 27.3 – o 379
2005-04-05 15:07:06 C 17 47 49.57 +48 46 36.3 – o 379
2005-04-05 15:09:08 C 17 47 49.37 +48 46 40.7 – o 379
2005-04-05 15:11:11 C 17 47 49.11 +48 46 45.8 – o 379
2005-04-05 15:13:13 C 17 47 48.89 +48 46 50.4 – o 379
2005-04-07 02:07:17 C 17 44 09.51 +50 01 39.2 – o 084
2005-04-07 02:09:20 C 17 44 09.28 +50 01 44.0 – o 084
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)