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
2022-09-23 19:28:47 C 22 21 26.630 -39 05 59.93 V M22
2022-09-23 19:31:25 C 22 21 26.501 -39 06 00.40 V M22
2022-09-23 19:35:28 C 22 21 26.438 -39 06 00.14 V M22
2022-09-23 19:43:18 C 22 21 25.985 -39 05 57.98 V M22
2022-10-15 06:29:53 C 22 10 33.505 -36 58 54.88 U F52
2022-10-15 06:43:37 C 22 10 33.474 -36 58 49.58 U F52
2022-10-15 06:57:13 C 22 10 33.450 -36 58 44.48 U F52
2022-10-15 07:28:17 C 22 10 33.373 -36 58 32.83 U F52
2024-09-25 08:25:49 C 02 21 39.719 -20 55 42.92 V 703
2024-09-25 08:29:08 C 02 21 39.604 -20 55 43.97 V 703
2024-09-25 08:33:03 C 02 21 39.319 -20 55 46.06 V 703
2024-09-25 08:36:21 C 02 21 39.067 -20 55 49.15 V 703
2024-09-26 13:15:53 C 02 20 25.495 -21 14 10.73 X F52
2024-09-26 13:30:07 C 02 20 24.830 -21 14 19.76 X F52
2024-09-26 13:44:23 C 02 20 24.168 -21 14 28.80 X F52
2024-09-26 13:58:37 C 02 20 23.509 -21 14 37.87 X F52
2024-09-26 23:57:16 C 02 19 57.353 -21 20 51.58 V M22
2024-09-26 23:59:54 C 02 19 57.144 -21 20 52.58 V M22
2024-09-27 00:04:28 C 02 19 56.988 -21 20 55.18 V M22
2024-09-27 00:12:23 C 02 19 56.594 -21 21 00.32 V M22
2024-09-28 06:54:16 C 02 18 31.865 -21 40 17.72 V W68
2024-09-28 06:59:30 C 02 18 31.596 -21 40 20.39 V W68
2024-09-28 07:19:13 C 02 18 30.655 -21 40 32.56 V W68
2024-09-28 07:27:04 C 02 18 30.187 -21 40 37.78 V W68
2024-09-29 04:55:35 C 02 17 28.774 -21 53 53.88 V W68
2024-09-29 05:00:21 C 02 17 28.517 -21 53 56.15 V W68
2024-09-29 05:06:17 C 02 17 28.224 -21 53 59.10 V W68
2024-09-29 05:50:04 C 02 17 25.985 -21 54 27.18 V W68
2024-10-02 06:16:18 C 02 13 42.065 -22 37 33.85 V W68
2024-10-02 07:04:28 C 02 13 39.278 -22 38 02.04 V W68
2024-10-02 07:43:49 C 02 13 37.097 -22 38 24.04 V W68
2024-10-02 08:20:09 C 02 13 35.028 -22 38 44.99 V W68
2024-10-03 05:29:33 C 02 12 25.663 -22 50 47.29 V W68
2024-10-03 05:32:10 C 02 12 25.586 -22 50 49.09 V W68
2024-10-03 05:36:08 C 02 12 25.308 -22 50 50.68 V W68
2024-10-03 06:13:27 C 02 12 23.167 -22 51 11.05 V W68
2024-10-03 23:00:09 C 02 11 26.676 -23 00 32.90 V M22
2024-10-03 23:34:03 C 02 11 24.696 -23 00 51.19 V M22
2024-10-03 23:36:41 C 02 11 24.533 -23 00 52.42 V M22
2024-10-03 23:41:14 C 02 11 24.276 -23 00 55.58 V M22
2024-10-04 10:55:33 C 02 10 45.794 -23 07 12.60 X F51
2024-10-04 11:11:18 C 02 10 44.843 -23 07 21.25 X F51
2024-10-04 11:26:43 C 02 10 43.918 -23 07 29.62 X F51
2024-10-04 11:42:12 C 02 10 42.982 -23 07 38.03 X F51
2024-10-08 22:14:52 C 02 04 15.274 -24 01 25.03 V M22
2024-10-08 22:18:19 C 02 04 15.065 -24 01 26.65 V M22
2024-10-08 22:57:15 C 02 04 12.504 -24 01 45.34 V M22
2024-10-08 23:01:53 C 02 04 12.158 -24 01 47.03 V M22
2024-10-09 08:11:48 C 02 03 37.062 -24 06 09.65 V G96
2024-10-09 08:19:16 C 02 03 36.565 -24 06 13.14 V G96
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)