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
2013-04-14 02:56:06 C 18 49 02.23 +39 29 12.9 c A24
2013-04-14 02:57:09 C 18 49 02.23 +39 29 12.4 c A24
2013-04-15 02:39:48 C 18 49 50.59 +39 11 36.0 c A24
2013-04-15 02:40:50 C 18 49 50.61 +39 11 35.3 c A24
2013-04-23 23:33:04 C 18 54 54.00 +36 23 47.4 15.9 u 089
2013-04-23 23:35:13 C 18 54 54.05 +36 23 45.4 16.1 u 089
2013-04-23 23:37:22 C 18 54 54.08 +36 23 43.8 16.2 u 089
2013-04-23 23:39:31 C 18 54 54.04 +36 23 41.7 16.1 u 089
2013-04-23 23:41:40 C 18 54 54.10 +36 23 40.1 16.1 u 089
2013-04-23 23:45:58 C 18 54 54.15 +36 23 36.8 16.1 u 089
2013-05-03 08:53:46 C 18 55 48.64 +32 57 22.5 16.9 c 704
2013-05-03 09:09:21 C 18 55 48.44 +32 57 07.0 16.9 c 704
2013-05-03 09:25:00 C 18 55 48.21 +32 56 51.1 16.8 c 704
2013-05-03 09:40:38 C 18 55 47.99 +32 56 36.0 16.9 c 704
2013-05-04 02:31:37 C 18 55 39.78 +32 39 19.8 q C18
2013-05-04 02:51:34 C 18 55 39.48 +32 38 59.7 q C18
2013-05-05 00:28:54 C 18 55 27.35 +32 16 30.2 q C18
2013-05-05 00:49:53 C 18 55 27.05 +32 16 08.8 q C18
2013-05-05 01:09:48 C 18 55 26.73 +32 15 48.3 q C18
2013-05-19 01:06:35 C 18 45 45.29 +25 07 12.4 q G40
2013-05-19 01:26:43 C 18 45 44.23 +25 06 41.9 q G40
2013-05-19 01:46:36 C 18 45 43.16 +25 06 11.8 q G40
2013-05-19 02:11:34 C 18 45 41.82 +25 05 33.8 q G40
2013-05-19 02:31:36 C 18 45 40.74 +25 05 03.2 q G40
2013-05-19 03:22:47 C 18 45 37.54 +25 03 40.4 q Z81
2013-05-19 04:03:57 C 18 45 35.30 +25 02 36.5 q Z81
2013-05-20 07:45:48 C 18 44 16.28 +24 18 53.3 u H21
2013-05-20 07:49:27 C 18 44 16.07 +24 18 47.5 u H21
2013-05-20 08:00:08 C 18 44 15.47 +24 18 30.5 u H21
2013-05-20 08:05:10 C 18 44 15.19 +24 18 22.5 u H21
2013-05-21 01:05:08 C 18 43 24.20 +23 50 47.0 q C95
2013-05-21 01:11:55 C 18 43 23.82 +23 50 36.0 q C95
2013-05-21 01:18:41 C 18 43 23.43 +23 50 24.9 q C95
2013-05-21 01:25:28 C 18 43 23.04 +23 50 14.4 q C95
2013-05-21 01:32:15 C 18 43 22.64 +23 50 02.9 q C95
2013-05-21 01:39:02 C 18 43 22.25 +23 49 52.3 q C95
2013-05-21 01:45:49 C 18 43 21.86 +23 49 41.0 q C95
2013-05-21 01:52:36 C 18 43 21.46 +23 49 29.9 q C95
2013-05-23 08:27:15 C 18 40 26.19 +22 17 23.1 o 926
2013-05-23 08:51:38 C 18 40 24.63 +22 16 41.1 o 926
2013-05-23 09:24:03 C 18 40 22.52 +22 15 44.1 o 926
2013-05-23 17:29:37 C 18 39 54.85 +22 01 32.1 o 300
2013-05-23 17:30:29 C 18 39 54.78 +22 01 30.7 o 300
2013-05-23 17:31:22 C 18 39 54.73 +22 01 29.1 o 300
2013-05-23 17:32:14 C 18 39 54.68 +22 01 27.6 o 300
2013-05-23 17:33:06 C 18 39 54.64 +22 01 26.0 o 300
2013-05-23 17:33:57 C 18 39 54.57 +22 01 24.6 o 300
2013-05-23 17:34:50 C 18 39 54.53 +22 01 23.1 o 300
2013-05-23 17:35:42 C 18 39 54.47 +22 01 21.6 o 300
2013-05-23 17:36:34 C 18 39 54.41 +22 01 20.0 o 300
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)