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
2020-06-19 07:22:07 C 15 25 55.30 +11 39 23.8 V U55
2020-06-19 07:33:50 C 15 25 55.57 +11 38 47.8 V U55
2020-06-19 07:45:31 C 15 25 55.84 +11 38 11.9 V U55
2020-06-19 22:50:20 C 15 26 21.71 +10 52 16.6 V 160
2020-06-19 22:52:42 C 15 26 21.78 +10 52 09.2 V 160
2020-06-19 22:55:40 C 15 26 21.85 +10 52 00.2 V 160
2020-06-20 21:56:38 C 15 27 03.31 +09 42 43.5 V Z80
2020-06-20 22:01:38 C 15 27 03.49 +09 42 29.1 V Z80
2020-06-20 22:06:37 C 15 27 03.58 +09 42 13.9 V Z80
2020-06-21 09:40:33 C 15 27 24.161 +09 08 03.68 U F51
2020-06-21 09:58:32 C 15 27 24.603 +09 07 10.37 U F51
2020-06-21 10:16:33 C 15 27 25.050 +09 06 16.86 U F51
2020-06-21 10:34:32 C 15 27 25.501 +09 05 23.48 U F51
2020-06-21 22:00:57 C 15 27 47.77 +08 31 30.6 V Z80
2020-06-21 22:02:37 C 15 27 47.79 +08 31 25.8 V Z80
2020-06-21 22:04:18 C 15 27 47.85 +08 31 20.7 V Z80
2020-06-21 22:05:57 C 15 27 47.93 +08 31 16.0 V Z80
2020-06-21 22:07:28 C 15 27 47.95 +08 31 11.5 V Z80
2020-06-21 22:14:57 C 15 27 47.39 +08 30 50.6 V C40
2020-06-21 22:17:56 C 15 27 47.96 +08 30 43.7 q 160
2020-06-21 22:20:06 C 15 27 48.01 +08 30 37.2 q 160
2020-06-21 22:22:15 C 15 27 48.08 +08 30 30.9 q 160
2020-06-21 22:25:39 C 15 27 47.70 +08 30 19.1 V C40
2020-06-21 22:32:05 C 15 27 47.89 +08 30 00.5 V C40
2020-06-21 22:40:39 C 15 27 48.14 +08 29 35.3 V C40
2020-06-21 22:52:25 C 15 27 48.47 +08 29 00.5 V C40
2020-06-21 23:03:23 C 15 27 48.79 +08 28 28.3 V C40
2020-06-21 23:25:53 C 15 27 49.46 +08 27 22.0 V C40
2020-06-22 08:30:54 C 15 28 07.59 +08 01 03.0 V T05
2020-06-22 08:35:31 C 15 28 07.71 +08 00 49.4 V T05
2020-06-22 08:44:46 C 15 28 07.94 +08 00 22.6 V T05
2020-06-22 09:00:05 C 15 28 08.33 +07 59 37.9 V T05
2020-06-22 20:36:04 C 15 28 31.22 +07 25 51.4 557
2020-06-22 21:05:21 C 15 28 32.03 +07 24 27.3 557
2020-06-22 21:21:52 C 15 28 32.00 +07 23 40.9 V C40
2020-06-22 21:26:09 C 15 28 32.13 +07 23 28.5 V C40
2020-06-22 21:28:22 C 15 28 32.67 +07 23 20.8 557
2020-06-22 21:32:34 C 15 28 32.32 +07 23 10.0 V C40
2020-06-22 21:34:43 C 15 28 32.38 +07 23 03.6 V C40
2020-06-22 21:36:35 C 15 28 32.93 +07 22 59.6 q 160
2020-06-22 21:38:43 C 15 28 32.99 +07 22 53.4 q 160
2020-06-22 21:40:51 C 15 28 33.05 +07 22 47.1 q 160
2020-06-22 21:46:28 C 15 28 32.72 +07 22 29.9 V C40
2020-06-22 21:47:33 C 15 28 32.75 +07 22 26.6 V C40
2020-06-22 21:59:07 C 15 28 33.53 +07 21 52.2 557
2020-06-22 22:03:38 C 15 28 33.21 +07 21 40.3 V C40
2020-06-22 22:19:20 C 15 28 33.68 +07 20 55.1 V C40
2020-06-22 22:24:12 C 15 28 34.24 +07 20 40.0 557
2020-06-22 22:27:53 C 15 28 33.93 +07 20 30.4 V C40
2020-06-22 22:31:07 C 15 28 34.04 +07 20 21.0 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)