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
2019-04-19 23:05:48 C 07 52 56.96 +60 29 48.5 – V Z80
2019-04-19 23:08:48 C 07 52 58.23 +60 29 48.0 – V Z80
2019-04-19 23:11:48 C 07 52 59.51 +60 29 47.0 – V Z80
2019-04-19 23:14:48 C 07 53 00.79 +60 29 46.6 – V Z80
2019-04-19 23:17:48 C 07 53 02.08 +60 29 45.9 – V Z80
2019-04-19 23:20:48 C 07 53 03.36 +60 29 45.1 – V Z80
2019-04-21 03:59:18 C 08 04 58.85 +60 22 55.4 – U I41
2019-04-21 04:00:34 C 08 04 59.37 +60 22 55.0 – U I41
2019-04-21 04:48:49 C 08 05 18.56 +60 22 38.1 – U I41
2019-04-21 04:52:48 C 08 05 20.15 +60 22 36.6 – U I41
2019-04-21 07:31:48 C 08 06 24.12 +60 21 49.4 – V T08
2019-04-21 07:53:57 C 08 06 32.92 +60 21 40.9 – V T08
2019-04-21 08:02:46 C 08 06 36.42 +60 21 37.7 – V T08
2019-04-21 16:08:57 C 08 09 51.96 +60 18 54.7 – q C97
2019-04-21 16:10:09 C 08 09 52.56 +60 18 54.1 – q C97
2019-04-21 16:11:20 C 08 09 52.93 +60 18 53.6 – q C97
2019-04-21 16:12:31 C 08 09 53.41 +60 18 53.3 – q C97
2019-04-21 16:13:42 C 08 09 53.89 +60 18 52.7 – q C97
2019-04-21 16:14:53 C 08 09 54.36 +60 18 52.1 – q C97
2019-04-23 04:42:28 C 08 23 56.30 +60 03 10.7 – V 703
2019-04-23 04:50:13 C 08 23 59.15 +60 03 06.4 – V 703
2019-04-23 04:57:58 C 08 24 01.98 +60 03 02.3 – V 703
2019-04-23 05:05:44 C 08 24 04.82 +60 02 58.1 – V 703
2019-04-23 07:54:03 C 08 25 07.26 +60 01 37.9 – V T05
2019-04-23 08:05:39 C 08 25 11.48 +60 01 31.4 – V T05
2019-04-23 08:14:19 C 08 25 14.64 +60 01 26.7 – V T05
2019-04-23 08:27:07 C 08 25 19.28 +60 01 19.5 – V T05
2019-04-24 16:35:27 C 08 36 53.20 +59 43 35.6 – q C97
2019-04-24 16:36:38 C 08 36 53.57 +59 43 35.0 – q C97
2019-04-24 16:37:49 C 08 36 53.94 +59 43 34.3 – q C97
2019-04-24 16:39:00 C 08 36 54.40 +59 43 33.4 – q C97
2019-04-24 16:40:10 C 08 36 54.78 +59 43 32.7 – q C97
2019-04-24 16:41:21 C 08 36 55.21 +59 43 31.9 – q C97
2019-04-24 16:42:33 C 08 36 55.63 +59 43 31.2 – q C97
2019-04-24 16:43:44 C 08 36 55.97 +59 43 30.5 – q C97
2019-04-25 07:36:38 C 08 42 02.81 +59 34 16.0 – V T08
2019-04-25 07:48:37 C 08 42 06.78 +59 34 07.8 – V T08
2019-04-25 08:09:26 C 08 42 13.69 +59 33 53.4 – V T08
2019-04-25 08:20:09 C 08 42 17.27 +59 33 46.0 – V T08
2019-04-25 22:48:36 C 08 47 07.98 +59 24 04.8 – V Z80
2019-04-25 22:50:07 C 08 47 08.47 +59 24 03.7 – V Z80
2019-04-25 22:51:37 C 08 47 08.96 +59 24 02.7 – V Z80
2019-04-25 22:53:06 C 08 47 09.42 +59 24 01.7 – V Z80
2019-04-25 22:54:37 C 08 47 09.90 +59 24 00.5 – V Z80
2019-04-25 22:56:07 C 08 47 10.43 +59 23 59.4 – V Z80
2019-04-25 22:57:38 C 08 47 10.93 +59 23 58.2 – V Z80
2019-04-25 22:59:07 C 08 47 11.40 +59 23 57.2 – V Z80
2019-04-25 23:00:37 C 08 47 11.90 +59 23 56.3 – V Z80
2019-04-25 23:02:02 C 08 47 12.37 +59 23 55.1 – V Z80
2019-04-26 16:23:36 C 08 52 50.53 +59 12 03.6 – q C97
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)