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
2020-02-21 08:24:13 C 04 52 00.53 +69 20 05.5 V T05
2020-02-21 08:43:13 C 04 51 58.56 +69 20 35.1 V T05
2020-02-23 06:14:51 C 04 48 13.05 +70 34 34.3 V T08
2020-02-23 06:22:53 C 04 48 12.21 +70 34 46.7 V T08
2020-02-23 06:27:38 C 04 48 11.70 +70 34 54.1 V T08
2020-02-23 06:46:27 C 04 48 09.72 +70 35 23.2 V T08
2020-02-23 23:57:45 C 04 46 49.95 +71 02 29.6 q I15
2020-02-23 23:59:50 C 04 46 49.68 +71 02 32.8 q I15
2020-02-24 00:01:56 C 04 46 49.48 +71 02 35.9 q I15
2020-02-27 09:12:14 C 04 40 52.16 +73 06 54.6 V T08
2020-02-27 09:17:34 C 04 40 51.72 +73 07 01.9 V T08
2020-02-27 09:25:08 C 04 40 51.17 +73 07 12.2 V T08
2020-02-27 09:40:47 C 04 40 50.00 +73 07 33.8 V T08
2020-03-02 05:58:22 C 04 35 24.21 +75 22 37.6 V T08
2020-03-02 06:03:01 C 04 35 23.85 +75 22 44.3 V T08
2020-03-02 06:26:41 C 04 35 21.94 +75 23 16.2 V T08
2020-03-06 07:50:57 C 04 30 58.15 +77 39 36.8 V T08
2020-03-06 07:56:41 C 04 30 57.87 +77 39 43.9 V T08
2020-03-06 08:05:08 C 04 30 57.33 +77 39 54.8 V T08
2020-03-06 08:22:17 C 04 30 56.40 +77 40 16.2 V T08
2020-03-07 18:38:51 C 04 29 52.52 +78 27 19.1 a 233
2020-03-07 18:43:22 C 04 29 52.33 +78 27 25.4 a 233
2020-03-07 18:48:30 C 04 29 52.08 +78 27 32.1 a 233
2020-03-12 20:49:32 n 04 27 41.85 +81 11 09.1 V Z43
2020-03-12 21:14:12 n 04 27 41.27 +81 11 40.1 V Z43
2020-03-24 06:46:43 C 04 57 17.18 +87 06 21.3 V T05
2020-03-24 06:50:57 C 04 57 18.77 +87 06 26.0 V T05
2020-03-24 06:58:28 C 04 57 21.10 +87 06 35.1 V T05
2020-03-24 07:14:35 C 04 57 27.05 +87 06 53.7 V T05
2020-03-24 12:37:06 C 04 59 59.98 +87 13 06.9 V T05
2020-03-24 12:41:12 C 05 00 02.56 +87 13 11.9 V T05
2020-03-24 12:49:13 C 05 00 07.53 +87 13 21.4 V T05
2020-03-24 13:05:37 C 05 00 16.68 +87 13 41.2 V T05
2020-03-24 13:07:46 C 05 00 18.36 +87 13 43.6 V T05
2020-03-24 13:13:55 C 05 00 21.90 +87 13 51.0 V T05
2020-03-24 13:23:02 C 05 00 27.63 +87 14 01.1 V T05
2020-03-24 13:38:08 C 05 00 36.91 +87 14 20.2 V T05
2020-04-03 12:50:44 C 14 41 21.99 +87 11 51.7 V T08
2020-04-03 12:55:31 C 14 41 23.36 +87 11 45.7 V T08
2020-04-03 13:05:27 C 14 41 26.80 +87 11 31.7 V T08
2020-04-06 19:22:53 C 15 05 06.82 +85 24 51.0 V A16
2020-04-06 19:39:11 C 15 05 09.69 +85 24 29.9 V A16
2020-04-06 19:55:30 C 15 05 12.41 +85 24 08.6 V A16
2020-04-06 20:11:49 C 15 05 15.09 +85 23 47.3 V A16
2020-04-07 10:22:20 C 15 07 26.58 +85 04 24.6 V T08
2020-04-07 12:24:13 C 15 07 33.62 +85 01 38.1 V T08
2020-04-07 12:30:50 C 15 07 34.33 +85 01 28.5 V T08
2020-04-07 12:38:10 C 15 07 34.76 +85 01 18.4 V T08
2020-04-08 19:59:41 C 15 11 40.79 +84 16 44.4 V L40
2020-04-08 20:03:11 C 15 11 40.92 +84 16 40.3 V L40
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)