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
2020-05-31 05:27:41 C 15 17 57.82 +37 01 42.5 – V V93
2020-05-31 18:22:15 C 15 18 04.50 +36 18 18.9 – V C40
2020-05-31 18:58:29 C 15 18 04.50 +36 16 17.6 – V C40
2020-05-31 18:59:35 C 15 18 04.50 +36 16 14.0 – V C40
2020-05-31 19:00:39 C 15 18 04.51 +36 16 10.4 – V C40
2020-05-31 19:03:51 C 15 18 04.51 +36 15 59.7 – V C40
2020-05-31 19:09:13 C 15 18 04.51 +36 15 41.7 – V C40
2020-05-31 19:10:17 C 15 18 04.51 +36 15 38.3 – V C40
2020-05-31 19:14:33 C 15 18 04.51 +36 15 23.8 – V C40
2020-05-31 19:20:59 C 15 18 04.52 +36 15 02.3 – V C40
2020-05-31 19:28:28 C 15 18 04.50 +36 14 37.3 – V C40
2020-05-31 19:31:41 C 15 18 04.51 +36 14 26.5 – V C40
2020-05-31 19:32:45 C 15 18 04.51 +36 14 22.8 – V C40
2020-05-31 19:33:48 C 15 18 04.50 +36 14 19.4 – V C40
2020-05-31 19:34:53 C 15 18 04.50 +36 14 15.7 – V C40
2020-05-31 19:35:57 C 15 18 04.49 +36 14 12.1 – V C40
2020-05-31 19:37:01 C 15 18 04.50 +36 14 08.6 – V C40
2020-05-31 19:39:11 C 15 18 04.50 +36 14 01.3 – V C40
2020-05-31 19:40:15 C 15 18 04.50 +36 13 57.7 – V C40
2020-05-31 19:52:56 C 15 18 04.48 +36 13 15.2 – V C40
2020-05-31 19:55:05 C 15 18 04.50 +36 13 07.8 – V C40
2020-05-31 19:56:09 C 15 18 04.49 +36 13 04.1 – V C40
2020-05-31 19:58:16 C 15 18 04.50 +36 12 57.1 – V C40
2020-05-31 20:02:34 C 15 18 04.49 +36 12 42.5 – V C40
2020-05-31 20:03:38 C 15 18 04.48 +36 12 39.0 – V C40
2020-05-31 20:07:54 C 15 18 04.49 +36 12 24.7 – V C40
2020-05-31 20:17:33 C 15 18 04.47 +36 11 52.2 – V C40
2020-05-31 21:58:58 C 15 18 05.37 +36 06 10.2 – V 130
2020-05-31 22:00:52 C 15 18 05.37 +36 06 03.8 – V 130
2020-05-31 22:03:10 C 15 18 05.37 +36 05 56.1 – V 130
2020-05-31 22:05:27 C 15 18 05.37 +36 05 48.3 – V 130
2020-05-31 22:53:40 C 15 18 05.44 +36 03 01.6 – V L65
2020-05-31 23:27:23 C 15 18 05.48 +36 01 07.3 – V L65
2020-05-31 23:54:16 C 15 18 05.54 +35 59 37.4 – V L65
2020-06-01 09:41:33 C 15 18 10.48 +35 26 55.9 – V T08
2020-06-01 10:11:02 C 15 18 10.42 +35 25 15.8 – V T08
2020-06-01 10:25:47 C 15 18 10.39 +35 24 25.7 – V T08
2020-06-01 18:18:11 C 15 18 15.99 +34 57 35.5 – V C40
2020-06-01 18:24:35 C 15 18 15.98 +34 57 14.0 – V C40
2020-06-01 18:26:45 C 15 18 16.00 +34 57 06.7 – V C40
2020-06-01 18:29:57 C 15 18 16.00 +34 56 55.8 – V C40
2020-06-01 18:31:01 C 15 18 16.00 +34 56 52.3 – V C40
2020-06-01 18:32:05 C 15 18 16.01 +34 56 48.7 – V C40
2020-06-01 18:33:09 C 15 18 16.01 +34 56 45.1 – V C40
2020-06-01 18:35:19 C 15 18 16.00 +34 56 38.0 – V C40
2020-06-01 18:36:23 C 15 18 16.00 +34 56 34.3 – V C40
2020-06-01 18:38:31 C 15 18 16.02 +34 56 27.2 – V C40
2020-06-01 18:39:35 C 15 18 16.02 +34 56 23.5 – V C40
2020-06-01 18:40:39 C 15 18 16.01 +34 56 19.9 – V C40
2020-06-01 18:42:47 C 15 18 16.03 +34 56 12.8 – 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)