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
2019-05-07 21:07:26 C 10 00 37.28 +55 13 06.3 15.6 – 238
2019-05-07 21:16:22 C 10 00 38.99 +55 12 57.1 15.6 – 238
2019-05-09 02:17:31 C 10 06 16.69 +54 44 15.6 – q I15
2019-05-09 02:19:43 C 10 06 17.08 +54 44 13.4 – q I15
2019-05-09 02:21:54 C 10 06 17.50 +54 44 11.2 – q I15
2019-05-09 04:16:46 C 10 06 39.57 +54 42 19.7 – U I41
2019-05-09 04:18:04 C 10 06 39.81 +54 42 18.4 – U I41
2019-05-09 04:49:17 C 10 06 45.54 +54 41 46.7 – U I41
2019-05-09 04:50:37 C 10 06 45.78 +54 41 45.4 – U I41
2019-05-09 19:42:11 C 10 09 32.90 +54 26 54.9 – q 006
2019-05-09 19:44:11 C 10 09 33.29 +54 26 53.3 – q 006
2019-05-09 19:46:12 C 10 09 33.61 +54 26 50.9 – q 006
2019-05-09 19:48:12 C 10 09 33.97 +54 26 49.2 – q 006
2019-05-09 19:50:12 C 10 09 34.32 +54 26 47.1 – q 006
2019-05-09 19:52:12 C 10 09 34.70 +54 26 44.9 – q 006
2019-05-09 19:54:12 C 10 09 35.00 +54 26 42.7 – q 006
2019-05-09 19:56:12 C 10 09 35.41 +54 26 40.8 – q 006
2019-05-11 07:03:04 C 10 15 54.62 +53 51 30.9 – V T08
2019-05-11 07:07:07 C 10 15 55.28 +53 51 26.7 – V T08
2019-05-11 07:16:27 C 10 15 56.86 +53 51 17.0 – V T08
2019-05-11 07:31:26 C 10 15 59.43 +53 51 01.6 – V T08
2019-05-11 21:32:24 C 10 18 25.56 +53 36 48.9 – q 006
2019-05-11 21:34:44 C 10 18 25.92 +53 36 46.5 – q 006
2019-05-11 21:37:05 C 10 18 26.33 +53 36 44.0 – q 006
2019-05-11 21:44:44 C 10 18 27.63 +53 36 35.8 – q 006
2019-05-11 21:48:16 C 10 18 28.23 +53 36 32.4 – q 006
2019-05-11 21:50:47 C 10 18 28.64 +53 36 29.8 – q 006
2019-05-11 21:53:10 C 10 18 29.03 +53 36 27.3 – q 006
2019-05-11 21:56:06 C 10 18 29.52 +53 36 24.3 – q 006
2019-05-13 07:08:48 C 10 24 04.64 +53 02 56.3 – V T05
2019-05-13 07:12:47 C 10 24 05.27 +53 02 52.3 – V T05
2019-05-13 07:20:51 C 10 24 06.54 +53 02 43.9 – V T05
2019-05-13 07:34:53 C 10 24 08.77 +53 02 29.4 – V T05
2019-05-13 19:49:42 C 10 26 08.88 +52 50 01.5 – q 006
2019-05-13 19:51:57 C 10 26 09.26 +52 49 59.5 – q 006
2019-05-13 19:54:12 C 10 26 09.61 +52 49 56.8 – q 006
2019-05-13 19:56:28 C 10 26 09.97 +52 49 54.8 – q 006
2019-05-13 19:58:42 C 10 26 10.31 +52 49 52.5 – q 006
2019-05-13 20:01:42 C 10 26 10.79 +52 49 49.3 – q 006
2019-05-13 20:04:43 C 10 26 11.24 +52 49 46.3 – q 006
2019-05-13 20:07:42 C 10 26 11.72 +52 49 43.3 – q 006
2019-05-14 04:14:12 C 10 27 29.79 +52 41 31.6 – U I41
2019-05-14 04:15:30 C 10 27 29.99 +52 41 30.2 – U I41
2019-05-14 05:48:08 C 10 27 44.33 +52 39 54.3 – U I41
2019-05-14 05:49:31 C 10 27 44.55 +52 39 52.8 – U I41
2019-05-15 07:15:14 C 10 31 43.43 +52 14 01.4 – V 703
2019-05-15 07:22:39 C 10 31 44.54 +52 13 53.5 – V 703
2019-05-15 07:28:54 C 10 31 45.99 +52 13 55.3 – V T08
2019-05-15 07:30:04 C 10 31 45.69 +52 13 45.2 – V 703
2019-05-15 07:32:54 C 10 31 46.60 +52 13 51.2 – V T08
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)