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
2020-07-19 08:44:28 C 15 58 34.17 -15 21 41.2 V T05
2020-07-20 07:39:36 C 15 59 58.40 -15 55 23.5 V T05
2020-07-20 07:44:54 C 15 59 58.70 -15 55 31.0 V T05
2020-07-20 07:55:29 C 15 59 59.30 -15 55 46.1 V T05
2020-07-20 08:18:03 C 16 00 00.59 -15 56 18.9 V T05
2020-07-21 08:10:32 C 16 01 29.40 -16 30 27.4 V T08
2020-07-21 08:15:50 C 16 01 29.72 -16 30 34.9 V T08
2020-07-21 08:25:47 C 16 01 30.30 -16 30 48.9 V T08
2020-07-21 08:39:52 C 16 01 31.12 -16 31 08.5 V T08
2020-07-23 07:56:06 C 16 04 31.03 -17 36 01.0 V T05
2020-07-23 08:00:44 C 16 04 31.32 -17 36 07.1 V T05
2020-07-23 08:10:01 C 16 04 31.89 -17 36 19.2 V T05
2020-07-23 08:24:34 C 16 04 32.76 -17 36 38.8 V T05
2020-08-08 07:12:12 C 16 31 38.66 -24 29 05.4 V T05
2020-08-08 07:16:51 C 16 31 39.01 -24 29 09.2 V T05
2020-08-08 07:24:49 C 16 31 39.58 -24 29 15.9 V T05
2020-08-08 07:39:26 C 16 31 40.62 -24 29 28.5 V T05
2020-08-09 07:49:57 C 16 33 32.28 -24 49 49.0 V T05
2020-08-09 07:57:53 C 16 33 32.86 -24 49 55.7 V T05
2020-08-09 08:16:30 C 16 33 34.20 -24 50 11.0 V T05
2020-08-09 08:28:28 C 16 33 35.22 -24 50 20.8 V T05
2020-08-10 07:07:18 C 16 35 20.90 -25 08 53.2 V T08
2020-08-10 07:10:37 C 16 35 21.17 -25 08 55.9 V T08
2020-08-10 07:15:16 C 16 35 21.50 -25 08 59.6 V T08
2020-08-10 07:39:08 C 16 35 23.27 -25 09 18.7 V T08
2020-08-14 07:33:32 C 16 42 59.36 -26 22 25.2 V T08
2020-08-14 07:38:11 C 16 42 59.72 -26 22 28.2 V T08
2020-08-14 08:02:46 C 16 43 01.65 -26 22 45.7 V T08
2021-09-06 11:57:08 C 07 48 38.39 +16 20 55.8 U I41
2021-09-06 12:06:52 C 07 48 39.71 +16 20 54.9 U I41
2021-09-06 12:10:27 C 07 48 40.17 +16 20 54.5 U I41
2021-09-06 12:14:00 C 07 48 40.64 +16 20 54.2 U I41
2021-09-06 12:17:34 C 07 48 41.13 +16 20 54.0 U I41
2021-09-07 11:55:51 C 07 51 53.44 +16 18 48.2 U I41
2021-09-07 11:59:20 C 07 51 53.92 +16 18 47.8 U I41
2021-09-07 12:02:49 C 07 51 54.38 +16 18 47.5 U I41
2021-09-07 12:09:49 C 07 51 55.34 +16 18 46.8 U I41
2021-09-09 12:01:53 C 07 58 27.11 +16 13 59.6 U I41
2021-09-09 12:05:32 C 07 58 27.61 +16 13 58.8 U I41
2021-09-09 12:12:49 C 07 58 28.62 +16 13 58.0 U I41
2021-09-09 12:16:29 C 07 58 29.11 +16 13 57.8 U I41
2021-09-13 12:02:17 C 08 11 42.35 +16 02 11.9 U I41
2021-09-14 12:03:21 C 08 15 03.33 +15 58 47.5 U I41
2021-09-14 12:06:50 C 08 15 03.82 +15 58 46.7 U I41
2021-09-14 12:10:20 C 08 15 04.32 +15 58 46.0 U I41
2021-09-14 12:13:50 C 08 15 04.80 +15 58 45.4 U I41
2021-09-14 12:17:19 C 08 15 05.29 +15 58 45.4 U I41
2021-09-15 12:02:06 C 08 18 24.78 +15 55 11.7 U I41
2021-09-15 12:09:04 C 08 18 25.76 +15 55 10.3 U I41
2021-09-15 12:12:34 C 08 18 26.25 +15 55 10.1 U I41
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)