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
2004-03-19 03:01:15 C 04 06 53.19 +23 23 11.9 19.7 c 704
2004-03-19 03:17:19 C 04 06 54.94 +23 23 25.1 19.5 c 704
2004-03-19 03:49:20 C 04 06 58.53 +23 23 51.8 19.4 c 704
2004-03-22 03:03:50 C 04 15 10.97 +24 23 01.4 19.9 c 704
2004-03-22 03:20:33 C 04 15 12.86 +24 23 14.2 19.6 c 704
2004-03-22 03:36:46 C 04 15 14.74 +24 23 27.0 20.1 c 704
2004-03-22 03:52:53 C 04 15 16.60 +24 23 41.5 20.1 c 704
2004-09-19 08:28:25 C 15 49 01.90 -18 23 57.7 c 474
2004-09-19 08:48:35 C 15 49 04.63 -18 24 14.7 c 474
2005-10-30 12:21:37 C 08 16 10.66 +08 49 04.9 o 644
2005-10-30 12:23:53 C 08 16 10.89 +08 49 04.7 o 644
2005-10-30 12:37:41 C 08 16 12.44 +08 49 04.0 o 644
2005-10-30 12:40:01 C 08 16 12.69 +08 49 03.8 o 644
2005-10-30 12:53:28 C 08 16 14.13 +08 49 02.6 o 644
2005-10-30 12:55:48 C 08 16 14.43 +08 49 02.7 o 644
2005-11-05 10:57:35 C 08 32 28.55 +08 39 59.8 18.8 c 704
2005-11-05 11:15:04 C 08 32 30.46 +08 39 59.4 19.2 c 704
2005-11-05 11:32:34 C 08 32 32.51 +08 39 58.4 18.7 c 704
2005-11-05 11:50:04 C 08 32 34.46 +08 39 57.7 19.0 c 704
2005-11-06 10:19:39 C 08 35 12.230 +08 38 46.97 645
2005-11-06 10:20:51 C 08 35 12.360 +08 38 47.09 645
2005-11-06 10:23:14 C 08 35 12.645 +08 38 46.93 645
2005-11-06 10:24:26 C 08 35 12.802 +08 38 46.43 645
2005-11-29 11:22:08 C 09 46 53.54 +08 47 51.4 r 703
2005-11-29 11:30:48 C 09 46 54.80 +08 47 51.8 r 703
2005-11-29 11:39:26 C 09 46 55.99 +08 47 52.7 r 703
2005-11-29 11:48:03 C 09 46 57.21 +08 47 53.7 r 703
2005-11-30 09:39:04 C 09 50 09.70 +08 50 23.3 r 703
2005-11-30 09:50:05 C 09 50 11.29 +08 50 24.3 r 703
2005-11-30 10:00:57 C 09 50 12.91 +08 50 25.4 r 703
2005-11-30 10:11:47 C 09 50 14.46 +08 50 27.2 r 703
2005-11-30 10:49:42 C 09 50 19.90 +08 50 32.2 18.3 c 704
2005-11-30 11:07:44 C 09 50 22.53 +08 50 33.9 18.8 c 704
2005-11-30 11:25:39 C 09 50 25.14 +08 50 37.1 18.4 c 704
2005-11-30 11:43:52 C 09 50 27.76 +08 50 38.1 18.6 c 704
2005-11-30 12:02:07 C 09 50 30.40 +08 50 40.6 18.9 c 704
2005-12-01 10:52:44 C 09 53 54.05 +08 53 31.2 18.2 c 704
2005-12-01 11:11:27 C 09 53 56.81 +08 53 33.9 18.4 c 704
2005-12-01 11:29:41 C 09 53 59.46 +08 53 36.1 18.4 c 704
2005-12-01 11:47:59 C 09 54 02.14 +08 53 38.5 18.4 c 704
2005-12-01 12:06:14 C 09 54 04.78 +08 53 41.9 18.5 c 704
2005-12-04 10:50:55 C 10 04 51.17 +09 04 07.0 18.0 c 704
2005-12-04 11:09:19 C 10 04 53.99 +09 04 09.8 18.2 c 704
2005-12-04 11:27:57 C 10 04 56.78 +09 04 13.7 18.3 c 704
2005-12-04 11:46:26 C 10 04 59.59 +09 04 16.1 18.4 c 704
2005-12-04 12:04:39 C 10 05 02.38 +09 04 19.3 18.3 c 704
2005-12-05 02:55:52 C 10 07 21.41 +09 06 48.3 i 071
2005-12-05 03:02:47 C 10 07 22.46 +09 06 49.0 i 071
2005-12-05 03:07:57 C 10 07 23.13 +09 06 49.7 i 071
2005-12-24 12:04:11 C 11 31 15.78 +11 25 44.1 r 703
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)