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
2020-01-29 15:33:06 C 05 53 08.51 +49 40 17.5 q O85
2020-01-29 15:36:37 C 05 53 08.01 +49 40 27.1 q O85
2020-01-29 15:37:22 C 05 53 07.92 +49 40 29.1 q O85
2020-01-29 15:38:06 C 05 53 07.81 +49 40 31.2 q O85
2020-01-29 15:41:37 C 05 53 07.32 +49 40 40.8 q O85
2020-01-29 15:42:22 C 05 53 07.23 +49 40 42.8 q O85
2020-01-29 15:43:06 C 05 53 07.12 +49 40 44.8 q O85
2020-01-29 15:48:06 C 05 53 09.36 +49 41 05.0 15.7 q C97
2020-01-29 15:50:17 C 05 53 09.05 +49 41 11.5 15.7 q C97
2020-01-29 15:52:28 C 05 53 08.84 +49 41 17.7 15.8 q C97
2020-01-29 15:54:39 C 05 53 08.38 +49 41 24.4 15.9 q C97
2020-01-30 08:22:28 C 05 51 02.12 +50 26 52.5 V T08
2020-01-30 08:27:12 C 05 51 01.44 +50 27 05.3 V T08
2020-01-30 08:36:31 C 05 51 00.13 +50 27 30.7 V T08
2020-01-30 08:52:28 C 05 50 57.87 +50 28 13.7 V T08
2020-01-30 23:27:04 C 05 49 08.09 +51 07 50.4 o Z22
2020-01-30 23:39:07 C 05 49 06.49 +51 08 20.3 o Z22
2020-01-31 01:18:39 C 05 48 56.15 +51 12 47.8 q W46
2020-01-31 01:31:08 C 05 48 54.41 +51 13 21.7 q W46
2020-01-31 01:42:55 C 05 48 52.74 +51 13 54.0 q W46
2020-01-31 02:45:36 C 05 48 46.02 +51 16 41.4 U I41
2020-01-31 02:46:18 C 05 48 45.93 +51 16 43.3 U I41
2020-01-31 02:46:57 C 05 48 45.85 +51 16 45.1 U I41
2020-01-31 02:47:37 C 05 48 45.75 +51 16 47.0 U I41
2020-01-31 03:40:13 C 05 48 38.13 +51 19 11.9 V 703
2020-01-31 03:48:06 C 05 48 37.04 +51 19 33.1 V 703
2020-01-31 03:56:00 C 05 48 35.91 +51 19 54.9 V 703
2020-01-31 04:03:57 C 05 48 34.77 +51 20 15.9 V 703
2020-01-31 15:49:19 C 05 47 04.85 +51 51 34.7 o C94
2020-01-31 16:02:35 C 05 47 03.00 +51 52 09.5 o C94
2020-01-31 19:32:15 C 05 46 38.97 +52 01 35.1 q 006
2020-01-31 19:35:00 C 05 46 38.57 +52 01 42.8 q 006
2020-01-31 19:37:45 C 05 46 38.22 +52 01 49.9 q 006
2020-01-31 19:40:30 C 05 46 37.82 +52 01 57.5 q 006
2020-01-31 19:46:00 C 05 46 37.07 +52 02 12.3 q 006
2020-01-31 19:52:28 C 05 46 36.19 +52 02 29.6 q 006
2020-01-31 19:55:13 C 05 46 35.79 +52 02 37.0 q 006
2020-01-31 19:57:58 C 05 46 35.42 +52 02 44.4 q 006
2020-01-31 20:04:01 C 05 46 34.58 +52 03 00.1 q 006
2020-01-31 20:07:19 C 05 46 34.12 +52 03 09.6 q 006
2020-02-01 22:35:11 C 05 43 14.27 +53 12 49.1 o Z22
2020-02-01 22:47:10 C 05 43 12.72 +53 13 20.6 o Z22
2020-02-03 03:12:36 C 05 39 41.84 +54 26 04.3 V 703
2020-02-03 03:20:32 C 05 39 40.74 +54 26 24.6 V 703
2020-02-03 03:28:27 C 05 39 39.68 +54 26 45.3 V 703
2020-02-03 03:36:23 C 05 39 38.44 +54 27 05.1 V 703
2020-02-03 09:20:34 C 05 38 53.12 +54 41 34.8 V T08
2020-02-03 09:25:17 C 05 38 52.45 +54 41 46.4 V T08
2020-02-03 09:28:39 C 05 38 51.99 +54 41 54.7 V T08
2020-02-03 09:33:58 C 05 38 51.26 +54 42 07.7 V T08
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)