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
2006-05-23 08:25:55 C 20 14 14.76 +02 47 18.2 r H45
2006-05-23 08:26:53 C 20 14 14.77 +02 47 17.2 r H45
2006-05-23 08:33:18 C 20 14 14.80 +02 47 11.2 r H45
2006-05-23 08:34:29 C 20 14 14.80 +02 47 10.0 r H45
2006-05-25 07:57:50 C 20 14 35.66 +02 00 28.6 r H45
2006-05-25 07:59:35 C 20 14 35.66 +02 00 27.0 r H45
2006-05-25 08:01:09 C 20 14 35.66 +02 00 25.2 r H45
2006-05-25 08:01:49 C 20 14 35.66 +02 00 24.7 r H45
2006-05-25 08:03:12 C 20 14 35.66 +02 00 23.1 r H45
2006-05-27 02:26:29 C 20 14 41.93 +01 16 25.8 r 170
2006-05-27 02:32:02 C 20 14 41.90 +01 16 19.8 r 170
2006-05-29 09:26:44 C 20 14 33.21 +00 16 18.7 16.7 c 704
2006-05-29 09:43:38 C 20 14 33.03 +00 15 59.6 16.9 c 704
2006-05-29 10:00:26 C 20 14 32.85 +00 15 40.6 17.1 c 704
2006-05-30 17:05:59 C 20 14 19.10 -00 19 58.5 r 379
2006-05-30 17:08:38 C 20 14 19.09 -00 20 01.8 r 379
2006-05-30 17:16:29 C 20 14 18.98 -00 20 11.2 r 379
2006-05-30 17:19:07 C 20 14 18.93 -00 20 13.7 r 379
2006-06-03 08:45:48 C 20 13 05.08 -02 06 53.3 r H45
2006-06-03 08:46:58 C 20 13 05.06 -02 06 54.8 r H45
2006-06-03 08:48:03 C 20 13 05.03 -02 06 56.2 r H45
2006-06-03 08:48:47 C 20 13 05.01 -02 06 57.2 r H45
2006-06-03 08:49:39 C 20 13 04.99 -02 06 58.3 r H45
2006-06-04 09:18:07 C 20 12 35.22 -02 38 30.2 17.5 c 704
2006-06-04 09:38:41 C 20 12 34.78 -02 38 57.3 18.1 c 704
2006-06-04 10:05:19 C 20 12 33.86 -02 39 31.4 17.6 c 704
2006-06-06 17:46:31 C 20 11 10.43 -03 54 05.0 r 379
2006-06-06 18:05:47 C 20 11 09.84 -03 54 31.5 r 379
2006-06-06 18:08:24 C 20 11 09.74 -03 54 35.2 r 379
2006-06-06 18:11:01 C 20 11 09.65 -03 54 38.5 r 379
2006-06-06 18:18:55 C 20 11 09.40 -03 54 48.6 r 379
2006-06-09 07:13:14 C 20 09 14.50 -05 20 36.2 r H45
2006-06-09 07:14:12 C 20 09 14.45 -05 20 37.5 r H45
2006-06-09 07:18:42 C 20 09 14.27 -05 20 43.9 r H45
2006-06-09 07:22:04 C 20 09 14.14 -05 20 48.9 r H45
2006-06-09 07:23:59 C 20 09 14.06 -05 20 51.7 r H45
2006-06-12 04:05:19 C 20 06 33.77 -07 02 09.6 c 844
2006-06-12 04:17:37 C 20 06 33.20 -07 02 28.3 c 844
2006-06-12 04:40:49 C 20 06 32.11 -07 03 04.0 c 844
2006-06-12 05:06:10 C 20 06 30.89 -07 03 42.4 c 844
2006-06-12 05:17:43 C 20 06 30.32 -07 03 59.9 c 844
2006-06-14 06:36:58 C 20 04 15.69 -08 20 25.9 r H45
2006-06-14 06:42:39 C 20 04 15.40 -08 20 34.7 r H45
2006-06-14 06:43:26 C 20 04 15.35 -08 20 36.1 r H45
2006-06-14 06:44:24 C 20 04 15.31 -08 20 37.5 r H45
2006-06-14 06:46:40 C 20 04 15.18 -08 20 41.3 r H45
2006-06-14 22:57:06 C 20 03 27.59 -08 46 08.9 r A89
2006-06-14 23:02:59 C 20 03 27.18 -08 46 19.1 r A89
2006-06-14 23:08:56 C 20 03 26.90 -08 46 28.3 r A89
2006-06-15 07:19:17 C 20 03 01.93 -08 59 21.4 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)