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
2020-06-29 22:01:53 C 15 34 44.55 -00 08 50.6 – q 160
2020-06-30 14:21:26 C 15 35 24.50 -00 48 33.1 – q Q68
2020-06-30 14:23:34 C 15 35 24.57 -00 48 38.7 – q Q68
2020-06-30 14:25:43 C 15 35 24.66 -00 48 42.9 – q Q68
2020-06-30 14:27:52 C 15 35 24.70 -00 48 47.2 – q Q68
2020-07-04 09:16:49 C 15 39 23.50 -04 20 59.9 – V T05
2020-07-04 09:22:49 C 15 39 23.76 -04 21 13.2 – V T05
2020-07-04 09:32:09 C 15 39 24.13 -04 21 33.9 – V T05
2020-07-04 09:49:32 C 15 39 24.84 -04 22 12.4 – V T05
2020-07-04 23:33:13 C 15 40 02.92 -04 52 38.0 – V 204
2020-07-04 23:38:41 C 15 40 03.16 -04 52 50.1 – V 204
2020-07-04 23:44:09 C 15 40 03.40 -04 53 02.0 – V 204
2020-07-05 10:50:07 C 15 40 34.18 -05 17 04.8 – V T08
2020-07-05 10:55:26 C 15 40 34.38 -05 17 15.8 – V T08
2020-07-05 11:04:05 C 15 40 34.78 -05 17 34.8 – V T08
2020-07-06 08:16:42 C 15 41 35.83 -06 02 59.9 – V T08
2020-07-06 08:21:20 C 15 41 36.04 -06 03 09.7 – V T08
2020-07-06 08:30:39 C 15 41 36.43 -06 03 29.3 – V T08
2020-07-07 10:22:30 C 15 42 51.07 -06 57 26.9 – V T05
2020-07-07 10:27:51 C 15 42 51.29 -06 57 37.9 – V T05
2020-07-07 10:35:51 C 15 42 51.67 -06 57 54.3 – V T05
2020-07-07 10:51:06 C 15 42 52.37 -06 58 25.5 – V T05
2020-07-08 07:59:13 C 15 43 55.80 -07 41 24.1 – V T05
2020-07-08 08:03:50 C 15 43 56.01 -07 41 33.4 – V T05
2020-07-08 08:11:47 C 15 43 56.37 -07 41 49.5 – V T05
2020-07-08 08:26:59 C 15 43 57.05 -07 42 19.8 – V T05
2020-07-08 20:42:54 C 15 44 34.33 -08 06 55.4 – V A16
2020-07-08 20:59:13 C 15 44 35.05 -08 07 28.2 – V A16
2020-07-08 21:15:41 C 15 44 35.81 -08 08 00.6 – V A16
2020-07-08 21:32:49 C 15 44 36.60 -08 08 34.4 – V A16
2020-07-09 08:06:27 C 15 45 08.66 -08 29 13.3 – V T08
2020-07-09 08:11:06 C 15 45 08.87 -08 29 22.6 – V T08
2020-07-09 08:20:24 C 15 45 09.30 -08 29 40.8 – V T08
2020-07-09 08:36:19 C 15 45 10.04 -08 30 11.5 – V T08
2020-07-09 10:50:49 C 15 45 16.84 -08 34 15.4 – q E89
2020-07-09 10:57:38 C 15 45 17.15 -08 34 28.5 – q E89
2020-07-09 11:08:37 C 15 45 17.72 -08 34 50.2 – q E89
2020-07-09 21:21:22 C 15 45 49.21 -08 55 03.1 – q K73
2020-07-09 21:25:48 C 15 45 49.42 -08 55 11.1 – q K73
2020-07-10 08:35:12 C 15 46 24.01 -09 16 28.3 – V T08
2020-07-10 08:39:52 C 15 46 24.22 -09 16 37.1 – V T08
2020-07-10 08:49:11 C 15 46 24.66 -09 16 54.8 – V T08
2020-07-10 09:04:30 C 15 46 25.38 -09 17 24.0 – V T08
2020-07-10 19:43:45 C 15 46 59.21 -09 37 38.3 – q K73
2020-07-10 19:47:13 C 15 46 59.45 -09 37 48.3 – q K73
2020-07-10 19:50:51 C 15 46 59.58 -09 37 53.9 – q K73
2020-07-11 08:51:47 C 15 47 40.27 -10 02 04.8 – V T05
2020-07-11 08:58:13 C 15 47 40.58 -10 02 16.7 – V T05
2020-07-11 09:11:53 C 15 47 41.24 -10 02 41.9 – V T05
2020-07-11 09:18:14 C 15 47 41.52 -10 02 53.7 – 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)