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
2005-03-13 18:23:18 C 18 23 04.94 +23 27 40.4 r 379
2005-03-13 18:26:36 C 18 23 04.80 +23 27 50.9 r 379
2005-03-13 18:28:16 C 18 23 04.72 +23 27 56.5 r 379
2005-03-13 18:31:33 C 18 23 04.53 +23 28 07.6 r 379
2005-03-13 18:34:51 C 18 23 04.39 +23 28 18.6 r 379
2005-03-17 02:03:12 C 18 19 26.20 +27 46 10.7 o 084
2005-03-17 02:05:50 C 18 19 26.07 +27 46 19.5 o 084
2005-03-21 10:28:11 C 18 14 18.12 +33 06 17.6 15.2 c 704
2005-03-21 10:44:35 C 18 14 17.21 +33 07 06.8 15.0 c 704
2005-03-21 10:59:42 C 18 14 16.26 +33 07 52.1 14.9 c 704
2005-03-21 11:14:49 C 18 14 15.41 +33 08 37.6 14.8 c 704
2005-03-21 11:29:56 C 18 14 14.51 +33 09 22.3 14.9 c 704
2005-03-22 01:20:31 C 18 13 30.44 +33 49 54.9 o 084
2005-03-22 01:23:08 C 18 13 30.29 +33 50 02.7 o 084
2005-03-26 21:11:59 C 18 06 43.71 +39 15 18.9 o 084
2005-03-29 00:13:55 C 18 03 17.03 +41 29 58.9 o 084
2005-03-29 00:16:33 C 18 03 16.84 +41 30 06.0 o 084
2005-03-29 19:18:02 C 18 01 54.42 +42 19 04.6 m 379
2005-03-29 19:19:42 C 18 01 54.31 +42 19 08.5 m 379
2005-03-29 19:21:20 C 18 01 54.14 +42 19 13.0 m 379
2005-03-29 19:23:00 C 18 01 54.02 +42 19 17.2 m 379
2005-03-29 19:26:17 C 18 01 53.76 +42 19 25.3 m 379
2005-03-29 19:29:35 C 18 01 53.50 +42 19 33.7 m 379
2005-03-30 01:52:17 C 18 01 25.32 +42 35 34.2 o 084
2005-03-30 01:54:55 C 18 01 25.11 +42 35 40.8 o 084
2005-03-30 15:50:17 C 18 00 23.59 +43 10 44.1 m 355
2005-03-30 15:52:20 C 18 00 23.44 +43 10 49.7 m 355
2005-03-30 15:54:19 C 18 00 23.27 +43 10 54.7 m 355
2005-03-30 15:56:21 C 18 00 23.11 +43 10 59.5 m 355
2005-03-30 15:59:03 C 18 00 22.90 +43 11 06.6 m 355
2005-03-30 22:30:25 C 17 59 52.75 +43 27 13.1 d 557
2005-03-30 22:56:54 C 17 59 50.69 +43 28 20.2 d 557
2005-03-30 23:32:15 C 17 59 47.91 +43 29 49.5 d 557
2005-03-31 00:00:57 C 17 59 45.64 +43 31 02.0 d 557
2005-03-31 00:31:50 C 17 59 43.16 +43 32 19.9 d 557
2005-03-31 01:02:43 C 17 59 40.65 +43 33 37.8 d 557
2005-03-31 01:31:24 C 17 59 38.31 +43 34 49.9 d 557
2005-03-31 02:02:18 C 17 59 35.77 +43 36 07.4 d 557
2005-03-31 02:30:59 C 17 59 33.38 +43 37 19.2 d 557
2005-04-01 02:20:04 C 17 57 39.32 +44 35 39.3 o 084
2005-04-01 02:22:04 C 17 57 39.16 +44 35 44.2 o 084
2005-04-01 05:37:56 C 17 57 24.49 +44 43 35.8 c 750
2005-04-01 05:44:26 C 17 57 23.98 +44 43 51.7 c 750
2005-04-01 05:51:57 C 17 57 23.35 +44 44 10.3 c 750
2005-04-01 06:02:36 C 17 57 22.44 +44 44 36.9 c 750
2005-04-01 22:05:35 C 17 56 02.31 +45 23 03.3 d 557
2005-04-01 22:35:24 C 17 55 59.76 +45 24 15.7 d 557
2005-04-01 23:09:12 C 17 55 56.88 +45 25 37.6 d 557
2005-04-01 23:36:41 C 17 55 54.49 +45 26 44.7 d 557
2005-04-02 00:06:29 C 17 55 51.91 +45 27 56.8 d 557
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)