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
2020-05-30 19:02:36 C 15 17 54.55 +37 36 31.1 – V C40
2020-05-30 19:03:40 C 15 17 54.54 +37 36 27.7 – V C40
2020-05-30 19:04:45 C 15 17 54.54 +37 36 24.1 – V C40
2020-05-30 19:07:13 C 15 17 54.52 +37 36 16.1 – V C40
2020-05-30 19:09:21 C 15 17 54.52 +37 36 08.8 – V C40
2020-05-30 19:10:25 C 15 17 54.52 +37 36 05.4 – V C40
2020-05-30 19:14:43 C 15 17 54.51 +37 35 51.2 – V C40
2020-05-30 19:22:11 C 15 17 54.51 +37 35 26.2 – V C40
2020-05-30 19:23:17 C 15 17 54.50 +37 35 22.7 – V C40
2020-05-30 19:24:21 C 15 17 54.50 +37 35 19.1 – V C40
2020-05-30 19:26:29 C 15 17 54.49 +37 35 11.9 – V C40
2020-05-30 19:27:33 C 15 17 54.49 +37 35 08.4 – V C40
2020-05-30 19:28:37 C 15 17 54.48 +37 35 04.8 – V C40
2020-05-30 19:30:45 C 15 17 54.49 +37 34 57.7 – V C40
2020-05-30 19:31:50 C 15 17 54.49 +37 34 53.8 – V C40
2020-05-30 19:32:55 C 15 17 54.48 +37 34 50.5 – V C40
2020-05-30 19:33:59 C 15 17 54.49 +37 34 47.0 – V C40
2020-05-30 19:35:03 C 15 17 54.48 +37 34 43.3 – V C40
2020-05-30 19:37:11 C 15 17 54.49 +37 34 36.2 – V C40
2020-05-30 19:38:15 C 15 17 54.47 +37 34 32.7 – V C40
2020-05-30 19:39:19 C 15 17 54.47 +37 34 29.1 – V C40
2020-05-30 19:40:23 C 15 17 54.48 +37 34 25.5 – V C40
2020-05-30 19:41:27 C 15 17 54.47 +37 34 22.0 – V C40
2020-05-30 19:42:33 C 15 17 54.45 +37 34 18.3 – V C40
2020-05-30 19:43:37 C 15 17 54.46 +37 34 14.7 – V C40
2020-05-30 19:44:41 C 15 17 54.46 +37 34 11.2 – V C40
2020-05-30 19:45:45 C 15 17 54.47 +37 34 07.8 – V C40
2020-05-30 19:46:49 C 15 17 54.46 +37 34 04.2 – V C40
2020-05-30 19:47:53 C 15 17 54.46 +37 34 00.6 – V C40
2020-05-30 19:52:11 C 15 17 54.45 +37 33 46.3 – V C40
2020-05-30 19:53:15 C 15 17 54.44 +37 33 42.7 – V C40
2020-05-30 19:54:19 C 15 17 54.45 +37 33 39.2 – V C40
2020-05-30 19:55:23 C 15 17 54.44 +37 33 35.5 – V C40
2020-05-30 19:57:31 C 15 17 54.43 +37 33 28.4 – V C40
2020-05-30 19:58:35 C 15 17 54.44 +37 33 24.9 – V C40
2020-05-30 19:59:39 C 15 17 54.43 +37 33 21.2 – V C40
2020-05-30 20:00:44 C 15 17 54.43 +37 33 17.7 – V C40
2020-05-30 20:03:57 C 15 17 54.43 +37 33 06.9 – V C40
2020-05-30 20:05:02 C 15 17 54.42 +37 33 03.4 – V C40
2020-05-30 20:07:09 C 15 17 54.41 +37 32 56.2 – V C40
2020-05-30 20:08:13 C 15 17 54.42 +37 32 52.6 – V C40
2020-05-30 20:09:18 C 15 17 54.42 +37 32 49.1 – V C40
2020-05-30 21:55:47 C 15 17 55.22 +37 26 48.7 – V L65
2020-05-30 22:00:52 C 15 17 55.24 +37 26 31.5 – V L65
2020-05-30 22:05:55 C 15 17 55.20 +37 26 15.2 – V L65
2020-05-31 01:02:23 C 15 17 57.55 +37 16 27.8 – q I15
2020-05-31 01:03:28 C 15 17 57.52 +37 16 24.2 – q I15
2020-05-31 01:04:34 C 15 17 57.54 +37 16 20.7 – q I15
2020-05-31 03:51:49 C 15 17 58.01 +37 07 03.6 – V V93
2020-05-31 04:38:40 C 15 17 57.91 +37 04 27.0 – V V93
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)