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
2013-05-23 17:37:26 C 18 39 54.33 +22 01 18.4 o 300
2013-05-23 17:38:17 C 18 39 54.29 +22 01 16.8 o 300
2013-05-23 17:39:09 C 18 39 54.22 +22 01 15.4 o 300
2013-05-25 00:46:54 C 18 38 06.43 +21 05 32.0 q G40
2013-05-25 01:06:33 C 18 38 05.13 +21 04 56.7 q G40
2013-05-25 01:26:49 C 18 38 03.78 +21 04 20.3 q G40
2013-05-25 01:47:02 C 18 38 02.42 +21 03 43.8 q G40
2013-05-25 02:11:36 C 18 38 00.75 +21 02 59.4 q G40
2013-06-01 01:13:32 C 18 26 54.05 +15 31 26.7 q Z81
2013-06-01 02:36:53 C 18 26 47.39 +15 28 28.3 q Z81
2013-06-02 21:49:14 C 18 23 37.80 +13 54 11.5 w I99
2013-06-02 21:54:02 C 18 23 37.44 +13 54 01.1 w I99
2013-06-02 21:58:41 C 18 23 37.05 +13 53 50.8 w I99
2013-06-03 00:39:02 C 18 23 23.88 +13 47 52.9 q K20
2013-06-03 00:46:23 C 18 23 23.27 +13 47 36.1 q K20
2013-06-03 00:55:37 C 18 23 22.54 +13 47 16.4 q K20
2013-06-03 13:00:49 C 18 22 29.27 +13 20 24.4 o 300
2013-06-03 13:03:25 C 18 22 28.96 +13 20 17.0 o 300
2013-06-03 13:04:44 C 18 22 28.81 +13 20 14.9 o 300
2013-06-03 13:07:20 C 18 22 28.63 +13 20 07.9 o 300
2013-06-04 08:45:18 C 18 20 56.92 +12 35 50.1 u H21
2013-06-04 08:50:01 C 18 20 56.53 +12 35 39.4 u H21
2013-06-04 08:58:26 C 18 20 55.82 +12 35 20.1 u H21
2013-06-04 09:02:28 C 18 20 55.49 +12 35 10.9 u H21
2013-06-04 23:57:06 C 18 19 47.79 +12 01 04.4 q K20
2013-06-05 00:05:45 C 18 19 47.08 +12 00 44.3 q K20
2013-06-05 00:14:51 C 18 19 46.27 +12 00 23.2 q K20
2013-06-05 00:24:46 C 18 19 45.52 +12 00 01.0 q K20
2013-06-05 00:27:30 C 18 19 45.27 +11 59 54.6 q K20
2013-06-05 23:04:17 C 18 18 00.34 +11 07 39.7 q K20
2013-06-05 23:05:38 C 18 18 00.23 +11 07 36.7 q K20
2013-06-05 23:14:09 C 18 17 59.60 +11 07 17.8 q K20
2013-06-05 23:20:16 C 18 17 58.98 +11 07 02.8 q K20
2013-06-05 23:27:06 C 18 17 58.43 +11 06 47.1 q K20
2013-06-05 23:32:57 C 18 17 57.94 +11 06 33.4 q K20
2013-06-05 23:38:36 C 18 17 57.47 +11 06 20.4 q K20
2013-06-06 13:49:33 C 18 16 51.36 +10 33 20.9 o 300
2013-06-06 14:03:33 C 18 16 50.22 +10 32 48.0 o 300
2013-06-06 15:13:33 C 18 16 44.29 +10 30 04.4 o 300
2013-06-06 15:55:33 C 18 16 40.81 +10 28 24.4 o 300
2013-06-07 21:57:50 C 18 14 19.18 +09 17 15.9 q K20
2013-06-07 22:04:45 C 18 14 18.61 +09 16 59.3 q K20
2013-06-07 22:11:07 C 18 14 18.06 +09 16 44.1 q K20
2013-06-07 22:15:41 C 18 14 17.68 +09 16 33.4 q K20
2013-06-07 22:20:39 C 18 14 17.28 +09 16 21.6 q K20
2013-06-07 22:25:33 C 18 14 16.84 +09 16 09.8 q K20
2013-06-07 22:30:33 C 18 14 16.41 +09 15 57.7 q K20
2013-06-07 22:36:09 C 18 14 15.96 +09 15 44.8 q K20
2013-06-07 23:19:03 C 18 14 12.70 +09 14 08.3 q Z81
2013-06-08 00:05:42 C 18 14 08.43 +09 12 11.6 q C18
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)