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
2006-02-04 12:08:49 C 15 34 52.74 +18 09 55.1 18.6 c 704
2006-02-04 12:27:35 C 15 34 56.90 +18 09 57.1 18.1 c 704
2006-02-07 10:43:51 C 15 50 41.38 +18 15 54.5 r H45
2006-02-07 10:46:43 C 15 50 42.11 +18 15 55.1 r H45
2006-02-07 10:48:38 C 15 50 42.46 +18 15 55.0 r H45
2006-02-07 10:50:27 C 15 50 42.87 +18 15 55.2 r H45
2006-02-22 11:31:56 C 17 01 37.57 +17 56 21.3 17.6 c 704
2006-02-22 11:50:20 C 17 01 40.70 +17 56 19.5 17.9 c 704
2006-02-22 12:08:04 C 17 01 43.80 +17 56 16.9 18.3 c 704
2006-02-22 12:25:45 C 17 01 46.82 +17 56 14.2 19.1 c 704
2006-04-26 01:17:11 C 19 49 10.08 +10 14 13.5 c 113
2006-04-26 01:21:22 C 19 49 10.35 +10 14 11.8 c 113
2006-04-26 01:25:33 C 19 49 10.60 +10 14 09.6 c 113
2006-05-17 08:07:16 C 20 11 48.84 +04 54 56.5 r H45
2006-05-17 08:08:28 C 20 11 48.86 +04 54 56.0 r H45
2006-05-17 08:09:13 C 20 11 48.89 +04 54 55.0 r H45
2006-05-17 08:11:38 C 20 11 48.94 +04 54 53.1 r H45
2006-05-17 08:13:48 C 20 11 48.98 +04 54 51.3 r H45
2006-05-17 08:14:28 C 20 11 48.99 +04 54 50.7 r H45
2006-05-18 08:06:25 C 20 12 21.38 +04 35 08.6 r H45
2006-05-18 08:12:36 C 20 12 21.51 +04 35 03.6 r H45
2006-05-18 08:13:28 C 20 12 21.50 +04 35 02.5 r H45
2006-05-18 08:16:47 C 20 12 21.54 +04 34 59.6 r H45
2006-05-19 08:27:55 C 20 12 51.04 +04 14 29.2 r H45
2006-05-19 08:32:07 C 20 12 51.13 +04 14 25.9 r H45
2006-05-19 08:33:30 C 20 12 51.15 +04 14 24.6 r H45
2006-05-19 08:44:46 C 20 12 51.32 +04 14 14.6 r H45
2006-05-19 08:45:31 C 20 12 51.33 +04 14 13.8 r H45
2006-05-19 08:46:15 C 20 12 51.33 +04 14 13.5 r H45
2006-05-20 07:42:54 C 20 13 16.47 +03 54 13.2 r H45
2006-05-20 07:44:11 C 20 13 16.50 +03 54 12.1 r H45
2006-05-20 07:45:41 C 20 13 16.52 +03 54 11.0 r H45
2006-05-20 07:48:32 C 20 13 16.56 +03 54 08.3 r H45
2006-05-20 07:49:26 C 20 13 16.56 +03 54 07.6 r H45
2006-05-20 18:55:23 C 20 13 27.15 +03 44 19.5 D44
2006-05-20 18:58:28 C 20 13 27.19 +03 44 16.8 D44
2006-05-20 19:01:35 C 20 13 27.22 +03 44 14.0 D44
2006-05-20 19:04:40 C 20 13 27.26 +03 44 11.2 D44
2006-05-21 09:08:41 C 20 13 40.12 +03 31 27.0 r H45
2006-05-21 09:09:26 C 20 13 40.13 +03 31 26.3 r H45
2006-05-21 09:12:15 C 20 13 40.19 +03 31 23.9 r H45
2006-05-21 09:14:16 C 20 13 40.20 +03 31 22.1 r H45
2006-05-21 09:14:58 C 20 13 40.21 +03 31 21.6 r H45
2006-05-22 00:44:46 C 20 13 53.24 +03 17 06.7 r 157
2006-05-22 00:46:46 C 20 13 53.26 +03 17 04.7 r 157
2006-05-22 00:48:46 C 20 13 53.30 +03 17 02.6 r 157
2006-05-22 00:50:47 C 20 13 53.32 +03 17 01.0 r 157
2006-05-22 00:52:47 C 20 13 53.32 +03 16 59.3 r 157
2006-05-22 00:54:46 C 20 13 53.35 +03 16 57.4 r 157
2006-05-23 08:24:31 C 20 14 14.74 +02 47 19.4 r H45
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)