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
2012-12-07 09:17:10 C 08 52 35.29 +08 33 39.8 r 703
2012-12-07 09:25:05 C 08 52 36.01 +08 33 44.4 r 703
2012-12-10 05:04:00 C 08 59 17.69 +09 11 31.9 c A24
2012-12-10 05:05:03 C 08 59 17.78 +09 11 32.5 c A24
2012-12-12 04:15:40 C 09 04 06.59 +09 42 04.8 c A24
2012-12-12 04:16:42 C 09 04 06.68 +09 42 05.5 c A24
2012-12-15 15:21:22 C 09 12 53.653 +10 45 17.67 L F51
2012-12-15 15:36:07 C 09 12 55.172 +10 45 29.93 L F51
2012-12-15 15:44:57 C 09 12 56.088 +10 45 37.30 L F51
2012-12-16 22:44:29 C 09 16 21.11 +11 12 22.1 o C41
2012-12-16 23:26:46 C 09 16 25.58 +11 13 01.7 o C41
2012-12-16 23:28:13 C 09 16 25.73 +11 13 02.7 o C41
2012-12-20 09:28:01 C 09 25 47.74 +12 34 04.6 r 703
2012-12-20 09:42:29 C 09 25 49.36 +12 34 20.7 r 703
2012-12-20 09:57:04 C 09 25 50.95 +12 34 36.2 r 703
2012-12-21 11:31:08 C 09 28 53.22 +13 02 58.7 r G96
2012-12-21 11:37:53 C 09 28 53.97 +13 03 06.3 r G96
2012-12-21 11:44:39 C 09 28 54.76 +13 03 14.1 r G96
2012-12-21 11:51:29 C 09 28 55.56 +13 03 21.7 r G96
2013-01-01 22:11:26 C 10 06 54.32 +19 58 48.3 u J93
2013-01-01 22:18:31 C 10 06 55.49 +19 59 02.0 u J93
2013-01-06 06:57:03 C 10 24 55.87 +23 38 40.5 r 703
2013-01-06 07:08:20 C 10 24 57.88 +23 39 06.8 r 703
2013-01-06 07:19:38 C 10 24 59.90 +23 39 32.8 r 703
2013-01-06 07:31:05 C 10 25 01.95 +23 39 59.2 r 703
2013-01-09 08:10:01 C 10 39 08.08 +26 32 58.5 16.9 c 704
2013-01-09 08:29:01 C 10 39 11.75 +26 33 48.3 16.1 c 704
2013-01-09 08:47:43 C 10 39 15.40 +26 34 34.7 16.1 c 704
2013-01-09 09:06:52 C 10 39 19.18 +26 35 23.5 16.1 c 704
2013-01-09 09:25:32 C 10 39 22.84 +26 36 09.7 16.0 c 704
2013-01-10 09:20:12 C 10 44 21.80 +27 36 35.4 15.8 c 704
2013-01-10 09:38:42 C 10 44 25.57 +27 37 23.1 16.0 c 704
2013-01-10 09:57:16 C 10 44 29.33 +27 38 11.0 16.3 c 704
2013-01-10 10:15:55 C 10 44 33.11 +27 38 58.9 15.8 c 704
2013-01-10 10:34:52 C 10 44 36.96 +27 39 46.9 16.0 c 704
2013-01-17 21:41:26 C 11 28 21.37 +35 50 52.0 o C77
2013-01-17 21:43:05 C 11 28 21.88 +35 50 57.0 o C77
2013-01-17 21:44:45 C 11 28 22.35 +35 51 01.1 o C77
2013-01-17 21:46:22 C 11 28 22.78 +35 51 06.3 o C77
2013-01-17 21:48:02 C 11 28 23.27 +35 51 10.9 o C77
2013-01-17 21:49:40 C 11 28 23.72 +35 51 15.2 o C77
2013-01-17 21:51:19 C 11 28 24.16 +35 51 20.5 o C77
2013-01-18 08:05:47 C 11 31 16.57 +36 20 47.5 r 703
2013-01-18 08:13:05 C 11 31 18.58 +36 21 08.7 r 703
2013-01-18 08:20:24 C 11 31 20.60 +36 21 29.8 r 703
2013-01-18 08:27:46 C 11 31 22.62 +36 21 51.2 r 703
2013-01-26 09:15:07 C 12 34 11.71 +45 04 46.0 u H21
2013-01-26 09:20:41 C 12 34 13.69 +45 04 59.7 u H21
2013-01-26 09:23:50 C 12 34 14.82 +45 05 07.7 u H21
2013-01-26 09:26:38 C 12 34 15.80 +45 05 14.4 u H21
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)