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
2020-02-03 09:35:58 C 05 38 50.98 +54 42 12.4 – V T08
2020-02-03 09:41:20 C 05 38 50.26 +54 42 25.6 – V T08
2020-02-03 09:50:38 C 05 38 48.96 +54 42 48.1 – V T08
2020-02-03 09:56:00 C 05 38 48.26 +54 43 01.2 – V T08
2020-02-04 04:10:15 C 05 36 36.15 +55 28 22.4 – V 654
2020-02-04 04:52:26 C 05 36 30.28 +55 30 06.3 – V 654
2020-02-04 15:55:48 C 05 35 09.95 +55 57 18.1 16.1 q C97
2020-02-04 15:58:00 C 05 35 09.75 +55 57 22.5 16.3 q C97
2020-02-04 16:00:10 C 05 35 09.48 +55 57 27.7 16.4 q C97
2020-02-04 16:02:21 C 05 35 09.07 +55 57 34.0 16.2 q C97
2020-02-05 09:23:08 C 05 32 58.57 +56 39 25.2 – V T05
2020-02-05 09:31:50 C 05 32 57.39 +56 39 45.3 – V T05
2020-02-05 09:47:08 C 05 32 55.31 +56 40 20.7 – V T05
2020-02-06 21:03:28 n 05 28 41.85 +58 03 09.4 – V Z43
2020-02-06 21:17:54 n 05 28 39.94 +58 03 42.7 – V Z43
2020-02-06 21:33:06 n 05 28 37.92 +58 04 17.4 – V Z43
2020-02-06 21:57:56 n 05 28 34.64 +58 05 14.1 – V Z43
2020-02-06 22:20:28 n 05 28 31.64 +58 06 05.2 – V Z43
2020-02-14 02:49:29 C 05 08 56.05 +64 10 48.0 – V 703
2020-02-14 02:58:31 C 05 08 54.91 +64 11 05.5 – V 703
2020-02-14 03:07:31 C 05 08 53.79 +64 11 22.5 – V 703
2020-02-14 03:16:28 C 05 08 52.65 +64 11 40.3 – V 703
2020-02-14 23:00:47 C 05 06 49.33 +64 49 19.2 – q I15
2020-02-14 23:02:52 C 05 06 49.06 +64 49 22.9 – q I15
2020-02-14 23:04:57 C 05 06 48.80 +64 49 27.1 – q I15
2020-02-15 07:02:33 C 05 05 56.26 +65 04 38.7 – V T08
2020-02-15 07:07:11 C 05 05 55.68 +65 04 47.3 – V T08
2020-02-15 07:16:25 C 05 05 54.52 +65 05 04.2 – V T08
2020-02-15 07:31:19 C 05 05 52.67 +65 05 31.4 – V T08
2020-02-17 02:47:05 C 05 01 31.48 +66 25 03.2 – V 703
2020-02-17 02:55:34 C 05 01 30.42 +66 25 18.3 – V 703
2020-02-17 03:04:02 C 05 01 29.45 +66 25 33.8 – V 703
2020-02-17 03:12:31 C 05 01 28.43 +66 25 49.0 – V 703
2020-02-18 19:14:02 S 04 57 37.27 +67 36 16.5 – L C51
2020-02-18 20:48:06 S 04 57 28.488 +67 39 00.61 – L C51
2020-02-18 20:48:17 S 04 57 28.409 +67 39 00.18 – L C51
2020-02-18 22:22:22 S 04 57 19.67 +67 41 43.5 – L C51
2020-02-18 23:56:36 S 04 57 10.70 +67 44 26.4 – L C51
2020-02-19 01:30:51 S 04 57 01.87 +67 47 09.2 – L C51
2020-02-19 04:39:11 S 04 56 44.23 +67 52 34.4 – L C51
2020-02-19 06:13:26 S 04 56 35.50 +67 55 16.4 – L C51
2020-02-19 09:21:45 S 04 56 18.06 +68 00 40.3 – L C51
2020-02-19 12:29:31 S 04 56 00.593 +68 06 03.49 – L C51
2020-02-19 15:38:34 S 04 55 43.279 +68 11 24.79 – L C51
2020-02-21 07:57:18 C 04 52 03.36 +69 19 23.7 – V T05
2020-02-21 08:00:43 C 04 52 02.99 +69 19 29.0 – V T05
2020-02-21 08:08:20 C 04 52 02.21 +69 19 40.9 – V T05
2020-02-21 08:14:20 C 04 52 01.59 +69 19 50.3 – V T05
2020-02-21 08:17:37 C 04 52 01.21 +69 19 55.3 – V T05
2020-02-21 08:21:34 C 04 52 00.84 +69 20 01.5 – V T05
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)