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
2020-05-02 10:34:32 C 15 20 33.964 +68 26 36.33 – U F51
2020-05-02 10:47:39 C 15 20 33.572 +68 26 09.65 – U F51
2020-05-02 10:59:53 C 15 20 33.203 +68 25 44.65 – U F51
2020-05-02 21:48:16 C 15 20 31.12 +68 03 17.4 – q Z36
2020-05-02 21:49:24 C 15 20 31.12 +68 03 14.9 – q Z36
2020-05-02 21:50:31 C 15 20 31.11 +68 03 12.8 – q Z36
2020-05-02 21:51:40 C 15 20 31.04 +68 03 10.6 – q Z36
2020-05-02 21:52:49 C 15 20 31.03 +68 03 08.3 – q Z36
2020-05-02 21:53:57 C 15 20 30.98 +68 03 05.9 – q Z36
2020-05-02 21:55:04 C 15 20 30.94 +68 03 03.7 – q Z36
2020-05-02 21:56:13 C 15 20 30.96 +68 03 01.4 – q Z36
2020-05-02 21:57:22 C 15 20 30.94 +68 02 59.3 – q Z36
2020-05-02 21:58:29 C 15 20 30.90 +68 02 56.8 – q Z36
2020-05-02 21:59:37 C 15 20 30.94 +68 02 54.8 – q Z36
2020-05-02 22:00:46 C 15 20 30.85 +68 02 52.3 – q Z36
2020-05-02 22:01:55 C 15 20 30.87 +68 02 50.3 – q Z36
2020-05-02 22:03:02 C 15 20 30.78 +68 02 47.7 – q Z36
2020-05-02 22:04:10 C 15 20 30.79 +68 02 45.6 – q Z36
2020-05-02 22:05:19 C 15 20 30.73 +68 02 43.3 – q Z36
2020-05-02 22:06:28 C 15 20 30.72 +68 02 40.9 – q Z36
2020-05-02 22:07:35 C 15 20 30.73 +68 02 38.6 – q Z36
2020-05-02 22:08:43 C 15 20 30.68 +68 02 36.6 – q Z36
2020-05-02 22:09:52 C 15 20 30.65 +68 02 34.1 – q Z36
2020-05-02 22:11:01 C 15 20 30.62 +68 02 31.7 – q Z36
2020-05-02 22:12:08 C 15 20 30.59 +68 02 29.6 – q Z36
2020-05-02 22:13:17 C 15 20 30.57 +68 02 27.3 – q Z36
2020-05-02 22:14:26 C 15 20 30.54 +68 02 24.9 – q Z36
2020-05-02 22:15:34 C 15 20 30.53 +68 02 22.7 – q Z36
2020-05-02 22:16:41 C 15 20 30.51 +68 02 20.4 – q Z36
2020-05-02 22:17:49 C 15 20 30.48 +68 02 18.2 – q Z36
2020-05-02 22:18:58 C 15 20 30.45 +68 02 15.7 – q Z36
2020-05-02 22:20:07 C 15 20 30.41 +68 02 13.6 – q Z36
2020-05-02 22:21:14 C 15 20 30.43 +68 02 11.4 – q Z36
2020-05-02 22:22:23 C 15 20 30.36 +68 02 09.2 – q Z36
2020-05-02 22:23:32 C 15 20 30.37 +68 02 06.8 – q Z36
2020-05-02 22:24:40 C 15 20 30.31 +68 02 04.4 – q Z36
2020-05-02 22:25:48 C 15 20 30.32 +68 02 02.2 – q Z36
2020-05-02 22:26:56 C 15 20 30.28 +68 01 59.8 – q Z36
2020-05-02 22:28:05 C 15 20 30.24 +68 01 57.6 – q Z36
2020-05-02 22:29:14 C 15 20 30.19 +68 01 55.1 – q Z36
2020-05-02 22:30:21 C 15 20 30.22 +68 01 53.2 – q Z36
2020-05-02 22:31:29 C 15 20 30.18 +68 01 50.7 – q Z36
2020-05-02 22:32:38 C 15 20 30.12 +68 01 48.5 – q Z36
2020-05-02 22:33:47 C 15 20 30.12 +68 01 46.2 – q Z36
2020-05-02 22:34:54 C 15 20 30.09 +68 01 43.9 – q Z36
2020-05-02 22:36:02 C 15 20 30.08 +68 01 41.5 – q Z36
2020-05-02 22:37:11 C 15 20 30.04 +68 01 39.5 – q Z36
2020-05-02 22:38:20 C 15 20 30.04 +68 01 37.2 – q Z36
2020-05-02 22:39:27 C 15 20 30.01 +68 01 34.9 – q Z36
2020-05-02 22:40:35 C 15 20 29.96 +68 01 32.7 – q Z36
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)