IAA RAS IAA Minor Planet Database

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
2020-01-05 21:27:08 C 06 54 02.58 +21 54 58.9 – U K83
2020-01-06 04:06:09 C 06 53 32.88 +22 11 45.1 – V 703
2020-01-06 04:15:45 C 06 53 32.08 +22 12 09.4 – V 703
2020-01-06 04:34:57 C 06 53 30.42 +22 12 55.4 – V 703
2020-01-06 22:44:21 C 06 52 04.62 +22 59 15.0 – V 160
2020-01-06 22:47:16 C 06 52 04.37 +22 59 22.5 – V 160
2020-01-06 22:50:13 C 06 52 04.12 +22 59 30.1 – V 160
2020-01-07 00:00:25 C 06 51 58.11 +23 02 30.8 – V A16
2020-01-07 00:21:30 C 06 51 56.30 +23 03 25.1 – V A16
2020-01-07 00:42:36 C 06 51 54.48 +23 04 19.4 – V A16
2020-01-07 01:45:53 C 06 51 49.09 +23 07 02.1 – V A16
2020-01-08 22:23:42 C 06 48 10.28 +25 05 27.6 – V 160
2020-01-08 22:26:46 C 06 48 10.00 +25 05 35.9 – V 160
2020-01-08 22:29:50 C 06 48 09.71 +25 05 44.1 – V 160
2020-01-11 13:17:38 C 06 42 35.825 +28 01 16.19 – q O85
2020-01-11 13:22:37 C 06 42 35.326 +28 01 31.01 – q O85
2020-01-11 19:59:10 C 06 41 58.41 +28 20 26.0 – q 006
2020-01-11 20:01:18 C 06 41 58.20 +28 20 32.1 – q 006
2020-01-11 20:03:26 C 06 41 57.99 +28 20 38.6 – q 006
2020-01-11 20:05:34 C 06 41 57.75 +28 20 44.6 – q 006
2020-01-11 20:07:41 C 06 41 57.55 +28 20 51.0 – q 006
2020-01-11 20:09:50 C 06 41 57.33 +28 20 56.8 – q 006
2020-01-11 20:11:58 C 06 41 57.14 +28 21 03.3 – q 006
2020-01-11 20:14:06 C 06 41 56.90 +28 21 09.4 – q 006
2020-01-11 21:56:28 C 06 41 46.21 +28 26 06.9 – V 160
2020-01-11 21:59:38 C 06 41 45.90 +28 26 16.5 – V 160
2020-01-11 22:02:48 C 06 41 45.57 +28 26 25.4 – V 160
2020-01-12 06:44:23 S 06 41 29.222 +29 07 56.39 – V C57
2020-01-12 07:14:23 S 06 41 26.021 +29 09 23.87 – V C57
2020-01-12 08:14:23 S 06 41 19.562 +29 12 24.80 – V C57
2020-01-12 08:44:23 S 06 41 16.387 +29 13 53.44 – V C57
2020-01-12 09:14:23 S 06 41 12.835 +29 15 30.28 – V C57
2020-01-12 09:44:23 S 06 41 09.650 +29 16 58.91 – V C57
2020-01-12 10:14:23 S 06 41 06.269 +29 18 32.22 – V C57
2020-01-12 10:44:23 S 06 41 03.034 +29 20 01.68 – V C57
2020-01-12 11:14:23 S 06 40 59.686 +29 21 33.41 – V C57
2020-01-12 12:14:23 S 06 40 53.102 +29 24 35.96 – V C57
2020-01-12 12:44:23 S 06 40 49.877 +29 26 04.60 – V C57
2020-01-12 13:14:23 S 06 40 46.474 +29 27 38.48 – V C57
2020-01-12 13:44:23 S 06 40 43.222 +29 29 08.38 – V C57
2020-01-12 14:14:23 S 06 40 39.912 +29 30 38.99 – V C57
2020-01-12 15:14:23 S 06 40 33.310 +29 33 40.03 – V C57
2020-01-12 15:14:23 s 1 -10425.143 0 +401827.53 1470.0 – C57
2020-01-12 15:44:23 S 06 40 29.950 +29 35 11.76 – V C57
2020-01-12 15:44:23 s 1 -11447.355 0 +402164.65 5640.0 – C57
2020-01-12 16:14:23 S 06 40 26.558 +29 36 45.72 – V C57
2020-01-12 16:14:23 s 1 -12469.421 0 +402493.74 7400.0 – C57
2020-01-12 16:44:23 S 06 40 23.393 +29 38 11.54 – V C57
2020-01-12 16:44:23 s 1 -13491.322 0 +402814.79 6780.0 – C57
2020-01-12 17:14:23 S 06 40 19.939 +29 39 45.76 – V C57
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)