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
2013-01-26 09:29:44 C 12 34 16.91 +45 05 22.1 u H21
2013-01-26 09:32:29 C 12 34 17.88 +45 05 29.0 u H21
2013-01-26 09:38:19 C 12 34 19.94 +45 05 43.0 u H21
2013-01-27 08:17:16 C 12 42 46.75 +45 59 47.6 u H21
2013-01-27 08:24:29 C 12 42 49.39 +46 00 04.7 u H21
2013-01-27 08:31:43 C 12 42 52.02 +46 00 21.9 u H21
2013-01-27 08:38:59 C 12 42 54.67 +46 00 39.2 u H21
2013-01-27 08:46:13 C 12 42 57.28 +46 00 56.3 u H21
2013-01-27 08:53:21 C 12 42 59.89 +46 01 13.4 u H21
2013-01-27 09:03:06 C 12 43 03.44 +46 01 36.3 u H21
2013-02-02 15:29:16 C 13 43 03.89 +50 52 32.6 o 300
2013-02-02 15:31:04 C 13 43 04.56 +50 52 35.2 o 300
2013-02-02 15:32:52 C 13 43 05.28 +50 52 38.6 o 300
2013-02-02 15:34:40 C 13 43 06.19 +50 52 40.9 o 300
2013-02-02 15:36:28 C 13 43 06.85 +50 52 44.3 o 300
2013-02-03 16:04:03 C 13 53 10.332 +51 27 52.71 L F51
2013-02-03 16:14:32 C 13 53 14.497 +51 28 06.57 L F51
2013-02-18 04:08:23 C 16 03 24.50 +53 56 21.7 o C60
2013-02-18 04:08:54 C 16 03 24.65 +53 56 21.2 o C60
2013-02-18 04:09:23 C 16 03 24.82 +53 56 21.0 o C60
2013-02-18 04:10:24 C 16 03 25.12 +53 56 20.8 o C60
2013-02-18 04:10:54 C 16 03 25.23 +53 56 20.7 o C60
2013-02-18 04:11:23 C 16 03 25.37 +53 56 20.5 o C60
2013-02-18 04:11:54 C 16 03 25.52 +53 56 20.4 o C60
2013-02-18 04:12:25 C 16 03 25.67 +53 56 20.2 o C60
2013-02-18 04:12:54 C 16 03 25.84 +53 56 20.2 o C60
2013-02-18 04:13:23 C 16 03 25.99 +53 56 19.9 o C60
2013-02-18 04:13:54 C 16 03 26.13 +53 56 20.0 o C60
2013-02-18 04:14:24 C 16 03 26.28 +53 56 20.2 o C60
2013-02-18 04:14:53 C 16 03 26.42 +53 56 19.7 o C60
2013-02-18 04:15:23 C 16 03 26.58 +53 56 19.5 o C60
2013-02-18 04:15:54 C 16 03 26.71 +53 56 19.5 o C60
2013-02-18 04:16:24 C 16 03 26.83 +53 56 19.4 o C60
2013-02-18 04:16:54 C 16 03 26.99 +53 56 19.5 o C60
2013-02-19 04:22:02 C 16 10 39.47 +53 49 14.5 c A24
2013-02-19 04:23:03 C 16 10 39.59 +53 49 14.9 c A24
2013-02-24 10:43:22 C 16 44 09.46 +52 53 11.2 u H21
2013-02-24 10:48:23 C 16 44 10.59 +52 53 08.6 u H21
2013-02-24 10:53:23 C 16 44 11.74 +52 53 06.1 u H21
2013-02-24 10:58:44 C 16 44 12.94 +52 53 03.2 u H21
2013-02-27 22:21:31 C 17 02 43.50 +52 04 01.8 q C73
2013-02-27 22:22:41 C 17 02 43.76 +52 04 01.5 q C73
2013-02-27 22:23:51 C 17 02 44.02 +52 04 00.8 q C73
2013-02-27 22:25:00 C 17 02 44.26 +52 04 00.2 q C73
2013-02-27 22:26:10 C 17 02 44.44 +52 03 59.4 q C73
2013-02-27 22:27:20 C 17 02 44.69 +52 03 58.9 q C73
2013-02-27 22:28:29 C 17 02 44.96 +52 03 58.1 q C73
2013-02-27 22:29:39 C 17 02 45.18 +52 03 57.3 q C73
2013-02-27 22:30:48 C 17 02 45.48 +52 03 57.1 q C73
2013-02-27 22:31:58 C 17 02 45.80 +52 03 56.5 q C73
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)