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
2006-06-29 16:41:07 C 19 40 00.02 -18 32 00.4 r 379
2006-06-29 16:43:45 C 19 39 59.82 -18 32 04.6 r 379
2006-07-03 17:04:18 C 19 32 17.38 -21 07 33.9 r 379
2006-07-03 17:06:55 C 19 32 17.15 -21 07 37.4 r 379
2006-07-03 17:12:09 C 19 32 16.70 -21 07 45.4 r 379
2006-07-03 17:17:25 C 19 32 16.22 -21 07 53.4 r 379
2006-07-03 17:25:09 C 19 32 15.59 -21 08 05.4 r 379
2006-07-03 17:40:54 C 19 32 14.23 -21 08 30.9 r 379
2006-07-18 03:47:30 C 19 05 30.12 -28 55 30.5 o 808
2006-07-18 03:57:29 C 19 05 29.33 -28 55 42.7 o 808
2006-07-18 04:07:39 C 19 05 28.67 -28 55 52.8 o 808
2006-07-30 11:17:01 C 18 49 21.22 -33 13 15.7 r 423
2006-07-30 11:37:01 C 18 49 20.25 -33 13 28.4 r 423
2008-08-27 16:26:53 C 00 23 34.15 -29 35 18.3 r E12
2008-08-27 16:38:54 C 00 23 33.50 -29 35 28.3 r E12
2008-08-27 16:50:26 C 00 23 32.96 -29 35 37.8 r E12
2008-08-27 17:04:23 C 00 23 32.24 -29 35 49.3 r E12
2010-07-27 16:07:34 S 02 37 46.53 -04 37 45.6 L C51
2010-07-27 19:18:05 S 02 37 57.88 -04 38 02.1 L C51
2010-07-28 01:39:07 S 02 38 20.57 -04 38 41.7 L C51
2010-07-28 08:00:10 S 02 38 42.77 -04 39 20.0 L C51
2010-07-28 09:35:19 S 02 38 48.22 -04 39 28.0 L C51
2010-07-28 19:06:53 S 02 39 22.27 -04 40 32.0 L C51
2010-07-29 01:27:54 S 02 39 44.60 -04 41 10.1 L C51
2010-09-27 08:48:41 C 03 21 16.14 -13 36 25.0 o H21
2010-09-27 08:58:21 C 03 21 15.94 -13 36 30.7 o H21
2010-09-27 09:07:28 C 03 21 15.79 -13 36 35.9 o H21
2010-09-27 09:16:36 C 03 21 15.64 -13 36 41.4 o H21
2010-10-14 00:38:56 C 03 07 58.14 -17 23 39.5 r J75
2010-10-14 00:57:52 C 03 07 57.15 -17 23 49.7 r J75
2010-10-14 01:16:48 C 03 07 56.15 -17 23 59.4 r J75
2010-11-02 08:03:01 C 02 38 04.95 -20 06 50.7 r 703
2010-11-02 08:15:32 C 02 38 04.05 -20 06 51.4 r 703
2010-11-02 08:28:05 C 02 38 03.01 -20 06 53.9 r 703
2010-11-02 08:40:31 C 02 38 02.07 -20 06 55.1 r 703
2010-11-13 06:17:35 C 02 18 52.16 -20 04 49.0 r 703
2010-11-13 06:28:35 C 02 18 51.26 -20 04 46.8 r 703
2010-11-13 06:40:34 C 02 18 50.36 -20 04 44.7 r 703
2010-11-13 06:51:32 C 02 18 49.64 -20 04 42.4 r 703
2010-12-05 04:30:56 C 01 50 22.27 -16 25 14.4 r 703
2010-12-05 04:43:52 C 01 50 21.80 -16 25 06.3 r 703
2010-12-05 04:56:48 C 01 50 21.30 -16 24 57.9 r 703
2010-12-05 05:09:40 C 01 50 20.90 -16 24 50.0 r 703
2010-12-13 02:43:41 C 01 45 32.07 -14 14 19.8 r 703
2010-12-13 02:53:08 C 01 45 31.96 -14 14 13.8 r 703
2010-12-13 03:02:27 C 01 45 31.60 -14 14 04.6 r 703
2010-12-13 03:11:52 C 01 45 31.50 -14 13 57.6 r 703
2011-02-01 05:28:42 C 02 16 00.078 +03 07 53.73 L F51
2011-02-01 05:34:26 C 02 16 00.409 +03 07 58.92 L F51
2011-02-01 05:41:14 C 02 16 00.803 +03 08 05.15 L F51
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)