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
2022-07-02 19:39:19 C 12 52 57.19 +36 19 33.6 V C40
2022-07-02 19:41:23 C 12 52 57.29 +36 19 31.3 V C40
2022-07-02 19:42:04 C 12 52 57.34 +36 19 30.5 V C40
2022-07-02 19:42:44 C 12 52 57.38 +36 19 29.8 V C40
2022-07-02 19:48:13 C 12 52 57.68 +36 19 23.7 V C40
2022-07-02 19:49:35 C 12 52 57.76 +36 19 22.2 V C40
2022-07-02 19:52:20 C 12 52 57.90 +36 19 19.1 V C40
2022-07-02 19:53:43 C 12 52 57.99 +36 19 17.6 V C40
2022-07-02 19:55:05 C 12 52 58.06 +36 19 16.1 V C40
2022-07-02 19:55:45 C 12 52 58.09 +36 19 15.4 V C40
2022-07-02 19:56:27 C 12 52 58.14 +36 19 14.6 V C40
2022-07-02 19:57:49 C 12 52 58.22 +36 19 13.0 V C40
2022-07-02 19:58:30 C 12 52 58.25 +36 19 12.3 V C40
2022-07-03 06:25:29 C 12 53 33.994 +36 07 55.45 V T08
2022-07-03 06:26:06 C 12 53 33.739 +36 07 49.69 U I41
2022-07-03 06:27:27 C 12 53 33.809 +36 07 48.22 U I41
2022-07-03 06:54:31 C 12 53 35.549 +36 07 23.48 V T08
2022-07-03 07:20:48 C 12 53 36.958 +36 06 54.29 V T08
2022-07-03 18:54:48 C 12 54 16.47 +35 54 12.9 V C40
2022-07-03 18:56:55 C 12 54 16.59 +35 54 10.5 V C40
2022-07-03 18:57:16 C 12 54 16.61 +35 54 10.1 V C40
2022-07-03 18:57:36 C 12 54 16.63 +35 54 09.9 V C40
2022-07-03 18:57:57 C 12 54 16.65 +35 54 09.4 V C40
2022-07-03 18:59:02 C 12 54 16.71 +35 54 08.2 V C40
2022-07-03 19:01:09 C 12 54 16.82 +35 54 05.8 V C40
2022-07-03 19:01:51 C 12 54 16.86 +35 54 05.1 V C40
2022-07-03 19:02:34 C 12 54 16.90 +35 54 04.3 V C40
2022-07-03 19:03:16 C 12 54 16.93 +35 54 03.6 V C40
2022-07-03 19:04:41 C 12 54 17.01 +35 54 01.9 V C40
2022-07-03 19:05:23 C 12 54 17.05 +35 54 01.2 V C40
2022-07-03 19:10:19 C 12 54 17.33 +35 53 55.8 V C40
2022-07-03 19:12:25 C 12 54 17.44 +35 53 53.4 V C40
2022-07-03 19:14:55 C 12 54 17.58 +35 53 50.6 V C40
2022-07-03 19:15:16 C 12 54 17.60 +35 53 50.3 V C40
2022-07-03 19:17:23 C 12 54 17.72 +35 53 47.9 V C40
2022-07-03 19:17:43 C 12 54 17.73 +35 53 47.6 V C40
2022-07-03 19:18:26 C 12 54 17.77 +35 53 46.7 V C40
2022-07-03 19:20:55 C 12 54 17.91 +35 53 44.0 V C40
2022-07-03 19:23:02 C 12 54 18.02 +35 53 41.7 V C40
2022-07-03 19:25:52 C 12 54 18.18 +35 53 38.6 V C40
2022-07-03 19:27:17 C 12 54 18.26 +35 53 36.9 V C40
2022-07-03 19:29:47 C 12 54 18.40 +35 53 34.2 V C40
2022-07-03 19:30:07 C 12 54 18.42 +35 53 33.8 V C40
2022-07-03 19:32:36 C 12 54 18.56 +35 53 31.1 V C40
2022-07-03 19:36:29 C 12 54 18.77 +35 53 26.8 V C40
2022-07-03 19:39:37 C 12 54 18.95 +35 53 23.3 V C40
2022-07-03 19:45:15 C 12 54 19.26 +35 53 17.0 V C40
2022-07-03 19:59:45 C 12 54 20.07 +35 53 01.0 V C40
2022-07-03 20:01:11 C 12 54 20.15 +35 52 59.4 V C40
2022-07-03 20:11:04 C 12 54 20.70 +35 52 48.4 V C40
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)