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
2011-02-01 05:46:58 C 02 16 01.131 +03 08 10.40 L F51
2011-03-28 03:08:53 C 04 11 54.27 +22 11 04.0 r 703
2011-03-28 03:17:01 C 04 11 55.21 +22 11 09.8 r 703
2011-03-28 03:21:10 C 04 11 55.78 +22 11 12.9 r G96
2011-03-28 03:25:09 C 04 11 56.25 +22 11 16.1 r 703
2011-03-28 03:28:41 C 04 11 56.65 +22 11 18.4 r G96
2011-03-28 03:33:15 C 04 11 57.19 +22 11 23.4 r 703
2011-03-28 03:36:11 C 04 11 57.55 +22 11 24.4 r G96
2011-03-28 03:43:44 C 04 11 58.41 +22 11 29.8 r G96
2011-04-04 03:08:42 C 04 32 19.60 +24 15 49.5 r G96
2011-04-04 03:13:56 C 04 32 20.29 +24 15 53.2 r G96
2011-04-04 03:19:09 C 04 32 20.94 +24 15 56.8 r G96
2011-04-04 03:24:22 C 04 32 21.58 +24 16 00.7 r G96
2012-09-23 09:09:22 C 06 16 50.88 +07 46 41.0 u 807
2012-09-23 09:18:09 C 06 16 51.63 +07 46 40.4 u 807
2012-09-23 09:23:55 C 06 16 52.12 +07 46 40.0 u 807
2012-09-23 09:29:40 C 06 16 52.60 +07 46 39.6 u 807
2012-09-23 09:35:26 C 06 16 53.08 +07 46 39.2 u 807
2012-10-22 14:24:06 c 07 16 35.901 +06 42 50.96 L F51
2012-10-22 14:44:27 c 07 16 37.566 +06 42 49.23 L F51
2012-10-23 10:28:43 C 07 18 17.54 +06 41 03.7 19.3 c 704
2012-10-23 11:08:26 C 07 18 20.72 +06 40 59.5 19.4 c 704
2012-10-23 11:28:14 C 07 18 22.42 +06 40 58.2 18.9 c 704
2012-10-23 13:52:23 c 07 18 34.705 +06 40 48.18 L F51
2012-10-23 14:08:56 c 07 18 36.061 +06 40 46.73 L F51
2012-10-27 13:32:52 c 07 26 38.548 +06 33 05.19 L F51
2012-10-27 13:49:26 c 07 26 39.908 +06 33 03.86 L F51
2012-10-30 14:30:51 c 07 32 47.448 +06 28 03.67 L F51
2012-10-30 14:46:13 c 07 32 48.699 +06 28 02.76 L F51
2012-11-10 10:22:28 C 07 54 46.86 +06 19 46.6 18.8 c 704
2012-11-10 10:43:43 C 07 54 48.56 +06 19 45.9 18.9 c 704
2012-11-10 11:04:50 C 07 54 50.31 +06 19 47.1 19.4 c 704
2012-11-10 11:26:23 C 07 54 52.06 +06 19 47.0 18.8 c 704
2012-11-10 11:47:53 C 07 54 53.83 +06 19 47.5 19.0 c 704
2012-11-11 13:24:26 C 07 57 04.917 +06 20 07.58 L F51
2012-11-11 13:42:19 C 07 57 06.389 +06 20 07.91 L F51
2012-11-26 10:15:11 C 08 28 04.48 +06 59 28.7 v H21
2012-11-26 10:20:26 C 08 28 04.93 +06 59 29.7 v H21
2012-11-26 10:25:40 C 08 28 05.39 +06 59 31.1 v H21
2012-11-26 10:30:56 C 08 28 05.83 +06 59 32.1 v H21
2012-12-01 10:03:35 C 08 38 58.54 +07 33 15.9 q H21
2012-12-01 10:07:45 C 08 38 58.90 +07 33 17.5 q H21
2012-12-01 10:11:55 C 08 38 59.29 +07 33 19.2 q H21
2012-12-01 10:15:57 C 08 38 59.65 +07 33 20.5 q H21
2012-12-06 03:42:59 C 08 49 42.52 +08 19 06.0 c A24
2012-12-06 03:44:01 C 08 49 42.61 +08 19 06.5 c A24
2012-12-06 04:50:25 C 08 49 48.81 +08 19 38.0 c A24
2012-12-06 04:51:26 C 08 49 48.88 +08 19 38.1 c A24
2012-12-07 09:01:28 C 08 52 33.78 +08 33 32.2 r 703
2012-12-07 09:09:19 C 08 52 34.64 +08 33 36.5 r 703
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)