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
2008-07-24 19:10:48 C 12 39 01.29 +45 10 16.3 15.6 r C20
2008-07-26 18:32:06 C 12 32 35.89 +43 50 20.7 16.2 o C20
2008-07-27 20:23:05 C 12 28 56.33 +43 04 48.0 o B38
2008-07-27 20:26:17 C 12 28 55.91 +43 04 42.1 o B38
2008-07-27 20:29:29 C 12 28 55.41 +43 04 36.0 o B38
2008-07-27 20:33:54 C 12 28 54.75 +43 04 28.2 o B38
2008-07-27 20:36:15 C 12 28 54.40 +43 04 24.0 o B38
2008-07-27 20:40:05 C 12 28 53.82 +43 04 16.8 o B38
2008-08-04 02:41:49 C 12 00 56.75 +37 14 32.4 r H53
2008-08-04 02:43:18 C 12 00 56.57 +37 14 28.7 r H53
2008-08-04 02:48:15 C 12 00 55.68 +37 14 17.8 r H53
2008-08-04 02:49:51 C 12 00 55.35 +37 14 13.5 r H53
2008-08-04 02:51:27 C 12 00 55.06 +37 14 10.4 r H53
2008-08-04 02:53:06 C 12 00 54.80 +37 14 06.5 r H53
2009-01-22 02:57:36 C 17 20 39.76 -06 18 24.6 17.7 r C20
2009-01-22 03:00:44 C 17 20 40.17 -06 18 24.1 17.9 r C20
2009-01-24 03:18:19 C 17 26 52.14 -06 10 17.0 17.6 r C20
2010-04-19 17:59:25 C 04 54 51.36 +21 50 12.6 17.4 u C20
2010-04-19 18:01:32 C 04 54 52.00 +21 50 16.7 17.2 u C20
2010-04-20 18:04:17 C 05 01 47.27 +22 33 37.3 17.3 u C20
2010-04-20 18:06:24 C 05 01 47.93 +22 33 41.4 17.2 u C20
2010-04-29 18:31:45 C 06 04 16.86 +28 10 24.0 16.6 u C20
2010-05-16 23:32:01 C 07 56 36.69 +33 32 21.4 w J93
2010-05-16 23:38:15 C 07 56 38.10 +33 32 22.9 w J93
2010-05-16 23:44:23 C 07 56 39.80 +33 32 25.2 w J93
2010-06-05 20:40:07 C 09 40 16.95 +32 53 11.3 u B38
2010-06-05 20:44:04 C 09 40 17.67 +32 53 09.8 u B38
2010-06-05 20:48:02 C 09 40 18.40 +32 53 08.2 u B38
2010-06-05 20:54:09 C 09 40 19.57 +32 53 05.9 u B38
2010-06-05 20:57:22 C 09 40 20.19 +32 53 04.7 u B38
2010-06-10 20:24:02 C 10 01 43.86 +32 03 31.8 16.9 u B38
2010-06-10 20:29:22 C 10 01 44.73 +32 03 29.5 17.0 u B38
2010-06-10 20:35:08 C 10 01 45.75 +32 03 26.5 17.0 u B38
2010-06-10 20:42:23 C 10 01 46.99 +32 03 23.3 17.0 u B38
2010-06-10 20:48:11 C 10 01 47.98 +32 03 20.6 17.0 u B38
2010-06-15 04:22:01 C 10 19 07.06 +31 12 30.5 r 703
2010-06-15 04:28:37 C 10 19 08.18 +31 12 27.8 r 703
2010-06-15 04:35:17 C 10 19 09.15 +31 12 23.4 r 703
2010-06-15 04:41:53 C 10 19 10.23 +31 12 19.8 r 703
2010-06-25 01:42:20 C 10 55 10.02 +28 55 45.7 o I15
2010-06-25 01:52:12 C 10 55 11.42 +28 55 39.5 o I15
2010-06-25 02:03:23 C 10 55 12.99 +28 55 32.2 o I15
2010-07-04 04:10:05 C 11 24 45.86 +26 32 39.3 r G96
2010-07-04 04:17:43 C 11 24 46.83 +26 32 34.0 r G96
2010-07-04 04:25:22 C 11 24 47.80 +26 32 28.7 r G96
2010-07-04 04:33:04 C 11 24 48.81 +26 32 23.4 r G96
2010-07-08 01:30:50 C 11 36 36.08 +25 27 52.5 o I15
2010-07-08 01:39:39 C 11 36 37.17 +25 27 45.2 o I15
2010-07-08 01:46:18 C 11 36 37.94 +25 27 41.3 o I15
2011-03-02 00:55:18 C 17 43 47.69 +04 12 34.4 u 585
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)