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
2020-05-29 10:40:13 C 15 17 42.021 +39 24 17.62 – U F52
2020-05-29 11:09:20 C 15 17 41.83 +39 22 40.8 – V T08
2020-05-29 21:12:03 C 15 17 46.71 +38 49 11.1 – V 196
2020-05-29 21:36:45 C 15 17 46.65 +38 47 49.5 – V 196
2020-05-29 21:49:07 C 15 17 46.63 +38 47 08.6 – V 196
2020-05-29 22:05:49 C 15 17 46.59 +38 46 13.4 – V 196
2020-05-29 22:41:31 C 15 17 46.53 +38 44 12.0 – V L65
2020-05-29 22:53:32 C 15 17 46.49 +38 43 32.2 – V L65
2020-05-29 23:03:36 C 15 17 46.49 +38 42 58.6 – V L65
2020-05-30 05:12:36 C 15 17 48.76 +38 22 40.5 – V V93
2020-05-30 05:15:59 C 15 17 48.77 +38 22 32.5 – q H45
2020-05-30 05:17:11 C 15 17 48.77 +38 22 28.6 – q H45
2020-05-30 05:18:35 C 15 17 48.77 +38 22 23.9 – q H45
2020-05-30 05:20:14 C 15 17 48.76 +38 22 18.4 – q H45
2020-05-30 05:21:31 C 15 17 48.76 +38 22 14.1 – q H45
2020-05-30 05:22:53 C 15 17 48.75 +38 22 09.5 – q H45
2020-05-30 05:57:06 C 15 17 48.61 +38 20 12.1 – V V93
2020-05-30 06:51:39 C 15 17 48.52 +38 17 09.6 – V V93
2020-05-30 08:12:45 C 15 17 50.63 +38 12 51.7 – V T05
2020-05-30 08:15:23 C 15 17 50.62 +38 12 43.0 – V T05
2020-05-30 08:52:54 C 15 17 50.44 +38 10 38.5 – V T05
2020-05-30 08:56:51 C 15 17 50.41 +38 10 25.4 – V T05
2020-05-30 10:17:27 C 15 17 50.026 +38 05 56.20 – U F52
2020-05-30 10:33:40 C 15 17 49.956 +38 05 01.79 – U F52
2020-05-30 10:49:55 C 15 17 49.888 +38 04 07.19 – U F52
2020-05-30 18:13:22 C 15 17 54.60 +37 39 14.3 – V C40
2020-05-30 18:18:44 C 15 17 54.58 +37 38 56.5 – V C40
2020-05-30 18:26:13 C 15 17 54.58 +37 38 31.8 – V C40
2020-05-30 18:27:17 C 15 17 54.59 +37 38 28.3 – V C40
2020-05-30 18:31:33 C 15 17 54.58 +37 38 14.1 – V C40
2020-05-30 18:32:37 C 15 17 54.59 +37 38 10.5 – V C40
2020-05-30 18:35:51 C 15 17 54.57 +37 37 59.8 – V C40
2020-05-30 18:39:04 C 15 17 54.57 +37 37 49.2 – V C40
2020-05-30 18:40:07 C 15 17 54.57 +37 37 45.8 – V C40
2020-05-30 18:42:16 C 15 17 54.56 +37 37 38.6 – V C40
2020-05-30 18:43:20 C 15 17 54.58 +37 37 35.2 – V C40
2020-05-30 18:45:29 C 15 17 54.56 +37 37 28.1 – V C40
2020-05-30 18:46:34 C 15 17 54.57 +37 37 24.4 – V C40
2020-05-30 18:48:42 C 15 17 54.57 +37 37 17.3 – V C40
2020-05-30 18:49:45 C 15 17 54.56 +37 37 13.8 – V C40
2020-05-30 18:50:49 C 15 17 54.56 +37 37 10.3 – V C40
2020-05-30 18:51:53 C 15 17 54.55 +37 37 06.8 – V C40
2020-05-30 18:52:57 C 15 17 54.56 +37 37 03.4 – V C40
2020-05-30 18:54:02 C 15 17 54.55 +37 36 59.8 – V C40
2020-05-30 18:55:07 C 15 17 54.55 +37 36 56.1 – V C40
2020-05-30 18:56:11 C 15 17 54.54 +37 36 52.7 – V C40
2020-05-30 18:57:15 C 15 17 54.54 +37 36 49.0 – V C40
2020-05-30 18:58:20 C 15 17 54.55 +37 36 45.4 – V C40
2020-05-30 18:59:24 C 15 17 54.55 +37 36 41.9 – V C40
2020-05-30 19:01:31 C 15 17 54.53 +37 36 34.9 – 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)