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
2020-05-20 20:14:02 C 15 17 33.93 +50 11 54.3 V C40
2020-05-21 04:15:16 C 15 17 34.14 +49 48 13.6 V U71
2020-05-21 04:20:04 C 15 17 34.10 +49 47 59.7 V U71
2020-05-21 04:25:48 C 15 17 34.05 +49 47 42.9 V U71
2020-05-21 04:29:42 C 15 17 34.02 +49 47 32.0 V U71
2020-05-21 09:04:38 C 15 17 31.99 +49 34 08.7 V T08
2020-05-21 09:07:17 C 15 17 31.94 +49 34 00.8 V T08
2020-05-21 09:13:23 C 15 17 31.85 +49 33 42.9 V T08
2020-05-21 09:22:46 C 15 17 31.70 +49 33 15.0 V T08
2020-05-21 21:06:04 C 15 17 30.41 +48 58 05.1 q K73
2020-05-21 21:09:27 C 15 17 30.40 +48 57 55.0 q K73
2020-05-21 21:12:46 C 15 17 30.36 +48 57 45.3 q K73
2020-05-21 21:49:21 C 15 17 29.91 +48 55 56.0 q K73
2020-05-21 21:51:54 C 15 17 29.87 +48 55 48.4 q K73
2020-05-21 23:26:38 C 15 17 28.93 +48 51 02.6 V K63
2020-05-21 23:31:53 C 15 17 28.84 +48 50 46.4 V K63
2020-05-21 23:37:14 C 15 17 28.81 +48 50 30.6 V K63
2020-05-22 21:10:22 C 15 17 27.90 +47 45 22.3 V K83
2020-05-22 21:13:52 C 15 17 27.91 +47 45 11.6 V K83
2020-05-22 21:30:08 C 15 17 27.71 +47 44 22.7 V K83
2020-05-22 21:53:34 C 15 17 27.47 +47 43 12.1 a 233
2020-05-22 21:58:09 C 15 17 27.44 +47 42 58.2 a 233
2020-05-22 22:04:01 C 15 17 27.37 +47 42 40.4 a 233
2020-05-23 07:55:14 C 15 17 25.48 +47 12 39.5 V 703
2020-05-23 08:02:30 C 15 17 25.38 +47 12 17.3 V 703
2020-05-23 08:09:44 C 15 17 25.31 +47 11 54.7 V 703
2020-05-23 08:17:00 C 15 17 25.19 +47 11 32.6 V 703
2020-05-23 09:52:00 C 15 17 26.08 +47 06 48.9 V T05
2020-05-23 09:56:37 C 15 17 26.02 +47 06 34.6 V T05
2020-05-23 10:47:27 C 15 17 25.34 +47 03 57.7 V T05
2020-05-23 11:27:58 C 15 17 24.83 +47 01 51.9 V T05
2020-05-23 19:12:31 C 15 17 26.59 +46 37 50.2 V C40
2020-05-23 19:24:17 C 15 17 26.48 +46 37 14.0 V C40
2020-05-23 19:25:21 C 15 17 26.46 +46 37 10.7 V C40
2020-05-23 19:26:26 C 15 17 26.45 +46 37 07.4 V C40
2020-05-23 19:27:31 C 15 17 26.44 +46 37 04.1 V C40
2020-05-23 19:30:43 C 15 17 26.41 +46 36 54.3 V C40
2020-05-23 19:32:51 C 15 17 26.39 +46 36 47.7 V C40
2020-05-23 19:36:04 C 15 17 26.37 +46 36 37.8 V C40
2020-05-23 19:37:09 C 15 17 26.36 +46 36 34.6 V C40
2020-05-23 19:39:17 C 15 17 26.34 +46 36 28.0 V C40
2020-05-23 19:40:22 C 15 17 26.32 +46 36 24.7 V C40
2020-05-23 19:47:48 C 15 17 26.25 +46 36 01.8 V C40
2020-05-23 19:48:53 C 15 17 26.23 +46 35 58.5 V C40
2020-05-23 19:49:58 C 15 17 26.23 +46 35 55.3 V C40
2020-05-23 20:01:45 C 15 17 26.11 +46 35 19.0 V C40
2020-05-23 20:02:49 C 15 17 26.09 +46 35 15.8 V C40
2020-05-23 20:03:52 C 15 17 26.09 +46 35 12.5 V C40
2020-05-23 20:04:57 C 15 17 26.08 +46 35 09.2 V C40
2020-05-23 20:06:01 C 15 17 26.07 +46 35 05.9 V C40
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)