137199 (1999 KX4)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2926061927 ± 3.63e-09
Semi-major axis (a)1.4573678721 AU ± 2.80e-10
Inclination (i)16.56957845° ± 6.22e-07
Long. of Asc. Node (Ω)104.87771298° ± 1.73e-06
Arg. of Perihelion (ω)76.49995727° ± 2.19e-06
Mean Anomaly (M)75.83993705° ± 9.92e-07
Mean Motion (n)0.5602198454°/day ± 1.61e-10
Perihelion dist (q)1.03093301 AU ± 5.29e-09
Aphelion dist (Q)1.88380274 AU ± 5.30e-09
Orbital Period1.75935624 yr ± 5.06e-10
Physical Parameters
H (abs. magnitude)16.97
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.196″
Uncertainty0
Orbit TypeAmor
MOID0.190752 AU
Observations Used3481
Radar Obs Used1
Gaia Obs Used105
Oppositions16
Arc Total1978-2015
First Observation Used1978-08-10
Last Observation Used2025-02-03
Observations (4268)
Date Type RA Dec Mag Band Observatory
2017-12-10 07:54:04 C 01 21 00.51 -16 45 54.3 U T05
2017-12-16 03:40:41 C 01 20 41.59 -15 02 26.1 U 703
2017-12-16 03:48:36 C 01 20 41.57 -15 02 20.6 U 703
2017-12-16 03:56:30 C 01 20 41.56 -15 02 14.2 U 703
2017-12-16 04:04:24 C 01 20 41.58 -15 02 08.9 U 703
2017-12-22 02:47:29 C 01 21 51.27 -13 10 43.3 U G96
2017-12-22 02:54:56 C 01 21 51.34 -13 10 37.5 U G96
2017-12-22 03:02:27 C 01 21 51.44 -13 10 31.3 U G96
2017-12-23 03:12:03 C 01 22 11.58 -12 51 12.5 U 703
2017-12-23 03:19:38 C 01 22 11.69 -12 51 05.3 U 703
2017-12-23 03:34:50 C 01 22 11.93 -12 50 54.2 U 703
2017-12-30 04:58:30 C 01 25 36.65 -10 32 29.0 o 691
2017-12-30 05:08:14 C 01 25 36.88 -10 32 21.1 o 691
2017-12-30 05:17:57 C 01 25 37.11 -10 32 13.1 o 691
2018-01-13 02:58:16 C 01 37 08.02 -05 49 30.9 U 703
2018-01-13 03:06:28 C 01 37 08.34 -05 49 25.6 U 703
2018-01-13 03:14:41 C 01 37 08.63 -05 49 17.5 U 703
2018-01-13 03:22:52 C 01 37 08.94 -05 49 10.6 U 703
2018-02-05 02:42:04 C 02 07 31.90 +02 10 06.4 U G96
2018-02-05 02:49:31 C 02 07 32.39 +02 10 12.6 U G96
2018-02-05 02:57:00 C 02 07 32.88 +02 10 18.6 U G96
2018-02-05 03:04:27 C 02 07 33.37 +02 10 25.9 U G96
2018-02-26 02:55:29 C 02 45 32.14 +09 25 42.1 U G96
2018-02-26 03:10:35 C 02 45 33.46 +09 25 55.3 U G96
2018-02-26 03:18:06 C 02 45 34.12 +09 26 01.5 U G96
2018-03-28 02:36:39 C 03 55 59.27 +19 09 24.2 U G96
2018-03-28 02:44:12 C 03 56 00.12 +19 09 29.9 U G96
2018-03-28 02:51:44 C 03 56 00.94 +19 09 34.7 U G96
2018-03-28 02:59:18 C 03 56 01.81 +19 09 40.5 U G96
2019-11-01 13:07:21 C 06 50 14.88 +03 20 03.5 V T08
2019-11-01 13:12:17 C 06 50 15.12 +03 20 03.1 V T08
2019-11-01 13:19:46 C 06 50 15.50 +03 20 02.3 V T08
2019-11-01 13:34:20 C 06 50 16.19 +03 20 01.1 V T08
2019-11-25 13:11:13 C 07 13 02.31 +03 26 33.1 V T08
2019-11-25 13:22:10 C 07 13 02.53 +03 26 35.4 V T08
2019-11-25 13:28:06 C 07 13 02.65 +03 26 36.5 V T08
2019-11-25 13:46:59 C 07 13 03.05 +03 26 40.3 V T08
2019-11-27 12:54:41 C 07 14 08.53 +03 36 59.5 V T05
2019-11-27 13:00:55 C 07 14 08.64 +03 37 00.8 V T05
2019-11-27 13:16:32 C 07 14 08.89 +03 37 04.8 V T05
2019-11-27 13:27:23 C 07 14 09.08 +03 37 07.3 V T05
2019-12-03 13:24:37 C 07 16 31.66 +04 24 09.2 V T08
2019-12-03 13:32:29 C 07 16 31.70 +04 24 12.5 V T08
2019-12-03 13:37:08 C 07 16 31.74 +04 24 14.5 V T08
2019-12-03 13:53:29 C 07 16 31.85 +04 24 21.2 V T08
2019-12-07 11:43:09 C 07 17 15.40 +05 10 09.9 V T08
2019-12-07 11:47:49 C 07 17 15.40 +05 10 12.2 V T08
2019-12-07 12:13:38 C 07 17 15.37 +05 10 26.8 V T08
2019-12-08 10:52:35 C 07 17 19.70 +05 23 37.2 V T08
2019-12-08 11:31:54 C 07 17 19.58 +05 24 01.0 V T08
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2013-05-11 08:20:00 304564740.19 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)