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
2019-04-11 03:14:21 C 06 09 47.69 +58 39 13.9 V 703
2019-04-11 03:22:12 C 06 09 51.76 +58 39 24.6 V 703
2019-04-14 16:18:11 C 06 53 47.65 +60 05 22.7 q C97
2019-04-14 16:20:21 C 06 53 48.67 +60 05 24.0 q C97
2019-04-14 16:22:33 C 06 53 49.66 +60 05 25.4 q C97
2019-04-14 16:24:43 C 06 53 50.68 +60 05 26.9 q C97
2019-04-14 19:34:25 C 06 55 26.61 +60 07 13.8 15.3 238
2019-04-14 19:38:40 C 06 55 28.70 +60 07 16.3 15.3 238
2019-04-14 19:42:55 C 06 55 30.79 +60 07 18.7 15.3 238
2019-04-15 03:52:51 C 06 59 34.50 +60 12 09.1 V 703
2019-04-15 04:01:11 C 06 59 38.39 +60 12 12.3 V 703
2019-04-15 04:09:30 C 06 59 42.61 +60 12 17.6 V 703
2019-04-15 20:23:09 C 07 07 42.69 +60 20 00.4 q C23
2019-04-15 20:33:33 C 07 07 47.75 +60 20 04.4 q C23
2019-04-15 20:43:23 C 07 07 52.47 +60 20 08.1 q C23
2019-04-15 20:53:13 C 07 07 57.22 +60 20 11.8 q C23
2019-04-15 21:09:24 C 07 08 05.03 +60 20 17.7 q C23
2019-04-17 06:17:16 C 07 23 56.241 +60 30 22.88 U F51
2019-04-17 06:29:58 C 07 24 02.072 +60 30 24.68 U F51
2019-04-17 06:42:26 C 07 24 07.789 +60 30 26.40 U F51
2019-04-17 07:30:35 C 07 24 29.86 +60 30 32.7 V T08
2019-04-17 07:42:39 C 07 24 35.41 +60 30 34.0 V T08
2019-04-17 07:54:10 C 07 24 40.75 +60 30 35.5 V T08
2019-04-17 08:07:43 C 07 24 47.01 +60 30 36.9 V T08
2019-04-17 20:56:26 C 07 30 44.24 +60 32 14.1 q C23
2019-04-17 21:00:29 C 07 30 46.08 +60 32 14.3 q C23
2019-04-17 21:03:57 C 07 30 47.65 +60 32 14.4 q C23
2019-04-17 21:07:25 C 07 30 49.23 +60 32 14.6 q C23
2019-04-18 00:54:28 C 07 32 33.52 +60 32 38.8 q I15
2019-04-18 00:57:43 C 07 32 34.98 +60 32 39.0 q I15
2019-04-18 01:02:03 C 07 32 36.91 +60 32 39.1 q I15
2019-04-18 21:01:54 C 07 41 37.08 +60 32 49.2 q C23
2019-04-18 21:05:57 C 07 41 38.86 +60 32 48.8 q C23
2019-04-18 21:09:25 C 07 41 40.41 +60 32 48.4 q C23
2019-04-19 19:26:01 C 07 51 23.86 +60 30 35.7 V C95
2019-04-19 19:27:13 C 07 51 24.35 +60 30 34.7 V C95
2019-04-19 19:28:24 C 07 51 24.86 +60 30 34.7 V C95
2019-04-19 19:29:36 C 07 51 25.32 +60 30 34.8 V C95
2019-04-19 19:30:48 C 07 51 25.96 +60 30 34.3 V C95
2019-04-19 19:31:59 C 07 51 26.32 +60 30 34.4 V C95
2019-04-19 19:46:40 C 07 51 32.68 +60 30 29.5 q C23
2019-04-19 19:47:02 C 07 51 32.92 +60 30 26.3 15.6 238
2019-04-19 19:51:53 C 07 51 34.86 +60 30 28.6 q C23
2019-04-19 19:55:42 C 07 51 36.57 +60 30 24.6 15.6 238
2019-04-19 19:56:30 C 07 51 36.83 +60 30 27.5 q C23
2019-04-19 20:03:31 C 07 51 39.86 +60 30 23.1 15.6 238
2019-04-19 22:53:58 C 07 52 51.96 +60 29 51.4 V Z80
2019-04-19 22:56:54 C 07 52 53.19 +60 29 50.6 V Z80
2019-04-19 22:59:49 C 07 52 54.42 +60 29 50.0 V Z80
2019-04-19 23:02:48 C 07 52 55.71 +60 29 49.2 V Z80
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)