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
2017-10-21 10:31:39 C 02 20 38.21 -22 25 36.8 T08
2017-10-21 10:46:15 C 02 20 37.16 -22 25 40.9 T08
2017-10-21 10:47:34 C 02 20 37.02 -22 25 41.5 T08
2017-10-21 10:48:53 C 02 20 36.93 -22 25 42.9 T08
2017-10-21 11:07:45 C 02 20 35.59 -22 25 46.5 T08
2017-10-21 11:19:37 C 02 20 34.63 -22 25 51.2 T08
2017-10-29 06:55:21 C 02 07 10.91 -23 05 06.8 U 703
2017-10-29 07:03:31 C 02 07 10.38 -23 05 08.1 U 703
2017-10-29 07:11:40 C 02 07 09.72 -23 05 09.0 U 703
2017-10-29 07:21:41 C 02 07 08.98 -23 05 08.9 U 703
2017-10-29 09:42:17 C 02 06 58.99 -23 05 23.4 T08
2017-10-29 09:54:31 C 02 06 58.08 -23 05 25.0 T08
2017-10-29 10:04:48 C 02 06 57.28 -23 05 25.7 T08
2017-10-29 10:14:23 C 02 06 56.59 -23 05 26.6 T08
2017-11-08 09:37:41 C 01 50 18.75 -22 58 29.4 U T05
2017-11-08 09:40:20 C 01 50 18.57 -22 58 28.6 U T05
2017-11-08 09:48:53 C 01 50 18.03 -22 58 26.8 U T05
2017-11-08 10:02:41 C 01 50 17.03 -22 58 24.3 U T05
2017-11-08 10:03:21 C 01 50 16.98 -22 58 24.3 U T05
2017-11-16 05:23:21 C 01 39 01.48 -22 10 12.3 U 703
2017-11-16 05:31:18 C 01 39 01.14 -22 10 08.7 U 703
2017-11-16 05:49:47 C 01 39 00.03 -22 10 02.8 U 703
2017-11-18 08:43:43 C 01 36 20.35 -21 51 02.1 U T08
2017-11-18 08:46:22 C 01 36 20.14 -21 51 01.6 U T08
2017-11-18 08:57:38 C 01 36 19.51 -21 50 57.0 U T08
2017-11-18 09:06:14 C 01 36 19.03 -21 50 52.3 U T08
2017-11-18 09:20:09 C 01 36 18.27 -21 50 46.8 U T08
2017-11-20 04:55:19 C 01 34 11.13 -21 32 43.1 U 703
2017-11-20 05:03:11 C 01 34 10.71 -21 32 39.0 U 703
2017-11-20 05:11:03 C 01 34 10.35 -21 32 36.7 U 703
2017-11-20 05:18:54 C 01 34 09.88 -21 32 33.8 U 703
2017-11-24 04:24:50 C 01 30 03.38 -20 47 39.0 U 703
2017-11-24 04:34:37 C 01 30 02.95 -20 47 34.1 U 703
2017-11-24 04:44:22 C 01 30 02.58 -20 47 29.3 U 703
2017-11-24 04:54:02 C 01 30 02.16 -20 47 23.7 U 703
2017-12-08 05:28:46 C 01 21 29.961 -17 21 31.28 U F51
2017-12-08 05:44:54 C 01 21 29.741 -17 21 20.15 U F51
2017-12-08 06:01:02 C 01 21 29.515 -17 21 08.90 U F51
2017-12-08 06:17:15 C 01 21 29.289 -17 20 57.62 U F51
2017-12-08 11:08:28 C 01 21 26.04 -17 17 35.4 q D29
2017-12-08 11:31:23 C 01 21 25.73 -17 17 19.4 q D29
2017-12-08 11:54:17 C 01 21 25.49 -17 17 03.1 q D29
2017-12-09 04:38:46 C 01 21 14.85 -17 05 17.4 U 703
2017-12-09 04:46:31 C 01 21 14.71 -17 05 12.4 U 703
2017-12-09 04:54:16 C 01 21 14.58 -17 05 07.1 U 703
2017-12-09 05:02:02 C 01 21 14.50 -17 05 00.6 U 703
2017-12-10 07:34:16 C 01 21 00.74 -16 46 07.6 U T05
2017-12-10 07:40:12 C 01 21 00.61 -16 46 03.5 U T05
2017-12-10 07:44:11 C 01 21 00.66 -16 46 01.3 U T05
2017-12-10 07:50:05 C 01 21 00.58 -16 45 57.4 U T05
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)