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
2015-08-19 18:01:47 C 23 56 27.90 -30 19 10.0 u Q60
2015-08-19 18:15:45 C 23 56 27.16 -30 19 21.8 u Q60
2015-09-05 14:10:17 C 23 32 08.78 -35 19 15.7 u Q60
2015-09-05 14:26:40 C 23 32 07.64 -35 19 24.4 u Q60
2015-09-05 14:41:33 C 23 32 06.57 -35 19 33.0 u Q60
2015-10-23 00:47:26 C 22 40 43.93 -35 13 29.8 u 807
2015-10-23 00:49:49 C 22 40 43.94 -35 13 28.6 u 807
2015-10-23 00:52:33 C 22 40 43.91 -35 13 27.8 u 807
2015-10-23 00:54:46 C 22 40 43.88 -35 13 26.8 u 807
2015-10-23 00:57:39 C 22 40 43.88 -35 13 25.3 u 807
2017-08-22 19:46:54 C 02 49 55.81 -09 35 15.7 q D29
2017-08-22 20:08:32 C 02 49 56.41 -09 35 25.0 q D29
2017-08-22 20:30:10 C 02 49 57.10 -09 35 34.4 q D29
2017-09-13 13:47:29 C 02 57 09.072 -14 04 11.91 L F51
2017-09-13 14:05:35 C 02 57 08.960 -14 04 22.81 L F51
2017-09-13 14:23:47 C 02 57 08.836 -14 04 33.83 L F51
2017-09-15 12:45:57 C 02 56 52.27 -14 32 39.8 L T08
2017-09-15 12:49:14 C 02 56 52.27 -14 32 41.6 L T08
2017-09-15 12:52:32 C 02 56 52.23 -14 32 43.1 L T08
2017-09-15 13:05:44 C 02 56 52.07 -14 32 51.7 L T08
2017-09-15 13:53:40 C 02 56 51.606 -14 33 20.83 L F51
2017-09-15 14:10:52 C 02 56 51.426 -14 33 31.34 L F51
2017-09-15 14:28:06 C 02 56 51.250 -14 33 41.89 L F51
2017-09-15 14:45:17 C 02 56 51.067 -14 33 52.36 L F51
2017-09-23 12:28:16 C 02 53 51.77 -16 32 28.1 L T08
2017-09-23 12:29:35 C 02 53 51.81 -16 32 27.0 L T08
2017-09-23 12:52:01 C 02 53 51.12 -16 32 42.7 L T08
2017-09-23 12:52:41 C 02 53 51.22 -16 32 42.9 L T08
2017-09-23 13:05:52 C 02 53 50.81 -16 32 51.1 L T08
2017-09-25 07:28:53 C 02 52 46.21 -16 59 39.6 q 703
2017-09-25 07:36:39 C 02 52 45.99 -16 59 44.5 q 703
2017-09-25 07:44:25 C 02 52 45.79 -16 59 50.3 q 703
2017-09-25 07:52:16 C 02 52 45.56 -16 59 53.5 q 703
2017-09-29 09:33:40 C 02 49 41.01 -18 01 10.5 q 703
2017-09-29 09:50:08 C 02 49 40.27 -18 01 20.7 q 703
2017-09-29 09:58:15 C 02 49 39.96 -18 01 25.6 q 703
2017-10-11 06:32:15 C 02 36 19.81 -20 44 39.2 U 703
2017-10-11 06:54:01 C 02 36 18.61 -20 44 50.7 U 703
2017-10-13 11:12:33 C 02 33 12.72 -21 10 21.1 L T08
2017-10-13 11:15:51 C 02 33 12.50 -21 10 24.3 L T08
2017-10-13 11:39:04 C 02 33 11.02 -21 10 32.6 L T08
2017-10-13 11:52:37 C 02 33 10.15 -21 10 41.7 L T08
2017-10-14 07:09:19 C 02 31 59.37 -21 19 37.5 U 703
2017-10-14 07:16:30 C 02 31 58.83 -21 19 41.1 U 703
2017-10-14 07:23:47 C 02 31 58.39 -21 19 45.0 U 703
2017-10-14 07:30:58 C 02 31 58.01 -21 19 47.6 U 703
2017-10-17 07:04:49 C 02 27 23.31 -21 50 26.2 U 703
2017-10-17 07:12:51 C 02 27 22.78 -21 50 29.4 U 703
2017-10-17 07:20:42 C 02 27 22.34 -21 50 31.7 U 703
2017-10-17 07:28:34 C 02 27 21.77 -21 50 35.7 U 703
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)