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
2020-05-23 20:08:09 C 15 17 26.04 +46 34 59.3 – V C40
2020-05-23 20:12:27 C 15 17 26.00 +46 34 46.1 – V C40
2020-05-23 20:13:31 C 15 17 25.98 +46 34 42.8 – V C40
2020-05-23 20:14:35 C 15 17 25.98 +46 34 39.5 – V C40
2020-05-23 20:16:45 C 15 17 25.95 +46 34 32.8 – V C40
2020-05-23 20:17:49 C 15 17 25.94 +46 34 29.5 – V C40
2020-05-23 20:22:05 C 15 17 25.90 +46 34 16.3 – V C40
2020-05-23 20:25:18 C 15 17 25.87 +46 34 06.6 – V C40
2020-05-23 20:26:23 C 15 17 25.86 +46 34 03.1 – V C40
2020-05-23 20:27:27 C 15 17 25.84 +46 34 00.0 – V C40
2020-05-23 21:16:00 C 15 17 25.37 +46 31 29.6 – V C40
2020-05-23 21:24:34 C 15 17 25.29 +46 31 03.1 – V C40
2020-05-23 21:25:38 C 15 17 25.27 +46 30 59.6 – V C40
2020-05-23 21:28:52 C 15 17 25.24 +46 30 49.8 – V C40
2020-05-23 21:31:01 C 15 17 25.22 +46 30 43.1 – V C40
2020-05-23 21:32:04 C 15 17 25.21 +46 30 39.8 – V C40
2020-05-23 21:37:26 C 15 17 25.16 +46 30 23.1 – V C40
2020-05-23 21:54:35 C 15 17 24.99 +46 29 29.7 – V C40
2020-05-23 22:00:12 C 15 17 24.94 +46 29 12.2 – V C40
2020-05-23 22:05:32 C 15 17 24.89 +46 28 55.5 – V C40
2020-05-23 22:07:41 C 15 17 24.87 +46 28 48.8 – V C40
2020-05-23 22:11:59 C 15 17 24.82 +46 28 35.4 – V C40
2020-05-23 22:14:07 C 15 17 24.81 +46 28 28.9 – V C40
2020-05-23 22:15:11 C 15 17 24.80 +46 28 25.5 – V C40
2020-05-23 22:16:15 C 15 17 24.79 +46 28 22.2 – V C40
2020-05-23 22:17:19 C 15 17 24.77 +46 28 18.7 – V C40
2020-05-23 22:19:29 C 15 17 24.75 +46 28 12.0 – V C40
2020-05-23 22:20:33 C 15 17 24.75 +46 28 08.6 – V C40
2020-05-23 22:25:53 C 15 17 24.71 +46 27 51.9 – V C40
2020-05-23 22:26:57 C 15 17 24.70 +46 27 48.7 – V C40
2020-05-23 22:30:11 C 15 17 24.68 +46 27 38.6 – V C40
2020-05-23 22:35:31 C 15 17 24.62 +46 27 21.9 – V C40
2020-05-23 22:37:41 C 15 17 24.61 +46 27 15.2 – V C40
2020-05-23 22:39:49 C 15 17 24.59 +46 27 08.5 – V C40
2020-05-23 22:40:53 C 15 17 24.58 +46 27 05.1 – V C40
2020-05-23 22:51:28 C 15 17 24.49 +46 26 31.9 – V C40
2020-05-23 22:53:36 C 15 17 24.46 +46 26 25.2 – V C40
2020-05-23 22:56:49 C 15 17 24.45 +46 26 15.2 – V C40
2020-05-23 22:58:58 C 15 17 24.43 +46 26 08.5 – V C40
2020-05-23 23:00:02 C 15 17 24.41 +46 26 05.1 – V C40
2020-05-23 23:02:11 C 15 17 24.40 +46 25 58.4 – V C40
2020-05-23 23:03:14 C 15 17 24.40 +46 25 55.0 – V C40
2020-05-23 23:05:23 C 15 17 24.37 +46 25 48.3 – V C40
2020-05-23 23:06:27 C 15 17 24.36 +46 25 45.0 – V C40
2020-05-23 23:07:31 C 15 17 24.35 +46 25 41.5 – V C40
2020-05-23 23:16:05 C 15 17 24.30 +46 25 14.7 – V C40
2020-05-23 23:18:15 C 15 17 24.27 +46 25 07.8 – V C40
2020-05-23 23:28:58 C 15 17 24.20 +46 24 34.2 – V C40
2020-05-23 23:39:07 C 15 17 24.13 +46 24 02.3 – V C40
2020-05-23 23:46:37 C 15 17 24.07 +46 23 38.7 – V C40
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)