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
2013-06-19 23:52:26 C 17 51 41.26 -02 29 58.5 14.7 u C01
2013-06-19 23:54:19 C 17 51 41.11 -02 30 03.2 14.6 u C01
2013-06-19 23:56:13 C 17 51 40.96 -02 30 07.9 14.8 u C01
2013-06-19 23:58:07 C 17 51 40.81 -02 30 12.3 14.8 u C01
2013-06-20 00:00:00 C 17 51 40.66 -02 30 16.9 14.8 u C01
2013-06-20 00:01:54 C 17 51 40.52 -02 30 21.4 14.8 u C01
2013-06-20 00:03:48 C 17 51 40.37 -02 30 26.0 14.8 u C01
2013-06-20 00:05:42 C 17 51 40.22 -02 30 30.6 14.7 u C01
2013-06-20 00:07:36 C 17 51 40.08 -02 30 35.0 14.7 u C01
2013-06-20 00:09:29 C 17 51 39.94 -02 30 39.5 14.7 u C01
2013-06-25 06:27:47 C 17 42 59.77 -07 24 06.6 u H21
2013-06-25 06:34:08 C 17 42 59.33 -07 24 20.9 u H21
2013-06-25 06:39:08 C 17 42 59.00 -07 24 32.4 u H21
2013-06-25 06:44:09 C 17 42 58.67 -07 24 43.3 u H21
2013-06-25 06:49:29 C 17 42 58.38 -07 24 55.4 u H21
2013-06-28 21:42:42 C 17 37 45.21 -10 32 45.5 q C95
2013-06-28 21:48:39 C 17 37 44.85 -10 32 58.0 q C95
2013-06-28 21:54:37 C 17 37 44.48 -10 33 10.6 q C95
2013-07-04 08:48:05 C 17 31 11.829 -14 49 18.27 L F51
2013-07-04 09:03:10 C 17 31 11.073 -14 49 45.91 L F51
2013-07-04 09:53:44 C 17 31 08.551 -14 51 18.09 L F51
2013-07-04 10:08:06 C 17 31 07.837 -14 51 44.27 L F51
2013-07-09 08:52:06 C 17 26 45.809 -18 14 13.90 L F51
2013-07-09 09:21:09 C 17 26 44.746 -18 14 59.99 L F51
2013-07-09 09:35:04 C 17 26 44.241 -18 15 21.95 L F51
2013-07-10 19:59:32 C 17 25 45.97 -19 08 51.1 17.4 u 089
2013-07-10 20:03:59 C 17 25 45.82 -19 08 58.2 17.4 u 089
2013-07-10 20:06:12 C 17 25 45.73 -19 09 01.1 16.8 u 089
2013-07-10 20:08:25 C 17 25 45.67 -19 09 04.3 17.0 u 089
2013-07-10 20:12:39 C 17 25 45.53 -19 09 10.9 17.1 u 089
2013-07-10 20:14:52 C 17 25 45.45 -19 09 14.5 17.3 u 089
2013-07-10 20:34:17 C 17 25 44.87 -19 09 44.3 17.1 u 089
2013-07-10 20:36:30 C 17 25 44.80 -19 09 47.4 17.3 u 089
2013-07-13 04:16:46 C 17 24 25.84 -20 30 55.8 r Y00
2013-07-13 04:20:49 C 17 24 25.67 -20 31 02.1 r Y00
2013-07-13 04:24:43 C 17 24 25.65 -20 31 07.4 r Y00
2015-06-07 08:23:10 C 23 22 25.01 -12 57 17.0 u 807
2015-06-07 08:27:30 C 23 22 25.29 -12 57 17.8 u 807
2015-06-07 08:31:50 C 23 22 25.56 -12 57 18.7 u 807
2015-06-07 08:36:08 C 23 22 25.86 -12 57 18.7 u 807
2015-06-07 08:40:25 C 23 22 26.16 -12 57 19.2 u 807
2015-07-30 13:44:05 C 00 09 12.129 -23 10 00.49 L F51
2015-07-30 13:58:53 C 00 09 12.011 -23 10 12.91 L F51
2015-07-30 14:13:50 C 00 09 11.897 -23 10 25.36 L F51
2015-07-30 14:28:26 C 00 09 11.779 -23 10 37.81 L F51
2015-08-05 09:14:49 C 00 07 40.20 -25 10 17.2 R G45
2015-08-05 09:22:52 C 00 07 40.02 -25 10 24.2 R G45
2015-08-05 09:30:29 C 00 07 39.88 -25 10 30.9 R G45
2015-08-05 09:38:14 C 00 07 39.70 -25 10 38.3 R G45
2015-08-19 17:47:40 C 23 56 28.56 -30 18 57.5 u Q60
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)