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
2006-06-15 07:21:46 C 20 03 01.80 -08 59 24.8 r H45
2006-06-15 07:25:26 C 20 03 01.57 -08 59 30.8 r H45
2006-06-15 07:26:53 C 20 03 01.51 -08 59 33.4 r H45
2006-06-15 07:29:08 C 20 03 01.39 -08 59 36.8 r H45
2006-06-18 10:17:52 C 19 58 54.70 -11 00 20.9 o 644
2006-06-18 10:36:33 C 19 58 53.50 -11 00 51.5 o 644
2006-06-18 10:51:55 C 19 58 52.52 -11 01 16.6 o 644
2006-06-20 04:30:30 C 19 56 21.68 -12 09 37.5 o 808
2006-06-20 04:39:00 C 19 56 21.21 -12 09 50.6 o 808
2006-06-20 04:48:30 C 19 56 20.46 -12 10 07.5 o 808
2006-06-20 05:31:25 C 19 56 18.00 -12 11 42.2 r H45
2006-06-20 05:33:54 C 19 56 17.83 -12 11 46.3 r H45
2006-06-20 05:35:34 C 19 56 17.72 -12 11 49.2 r H45
2006-06-20 05:42:55 C 19 56 17.24 -12 12 01.3 r H45
2006-06-20 05:44:05 C 19 56 17.16 -12 12 03.4 r H45
2006-06-20 15:48:25 C 19 55 38.44 -12 28 48.7 r 379
2006-06-20 15:51:03 C 19 55 38.26 -12 28 53.1 r 379
2006-06-20 16:01:33 C 19 55 37.58 -12 29 09.8 r 379
2006-06-21 07:02:06 C 19 54 40.05 -12 54 12.1 o 644
2006-06-21 07:32:51 C 19 54 37.90 -12 55 04.0 o 644
2006-06-21 07:55:21 C 19 54 36.14 -12 55 42.6 17.1 c 704
2006-06-21 08:00:55 C 19 54 35.94 -12 55 51.1 o 644
2006-06-21 08:22:56 C 19 54 34.05 -12 56 28.1 17.3 c 704
2006-06-21 08:36:47 C 19 54 33.18 -12 56 51.7 17.4 c 704
2006-06-21 08:50:36 C 19 54 32.19 -12 57 14.6 17.1 c 704
2006-06-22 22:03:12 C 19 52 03.35 -13 59 39.8 i 071
2006-06-22 22:05:12 C 19 52 03.19 -13 59 43.1 i 071
2006-06-22 22:07:11 C 19 52 03.05 -13 59 46.6 i 071
2006-06-22 22:09:08 C 19 52 02.91 -13 59 49.8 i 071
2006-06-23 07:23:42 C 19 51 24.60 -14 15 20.6 16.4 c 704
2006-06-23 07:37:36 C 19 51 23.61 -14 15 44.0 16.6 c 704
2006-06-23 07:51:28 C 19 51 22.58 -14 16 07.3 16.6 c 704
2006-06-23 08:05:23 C 19 51 21.53 -14 16 30.6 16.8 c 704
2006-06-23 08:19:17 C 19 51 20.51 -14 16 54.5 16.7 c 704
2006-06-24 07:55:54 C 19 49 41.16 -14 56 39.8 16.2 c 704
2006-06-24 08:10:43 C 19 49 39.99 -14 57 03.5 16.8 c 704
2006-06-24 08:25:38 C 19 49 38.88 -14 57 29.8 16.5 c 704
2006-06-24 08:40:36 C 19 49 37.68 -14 57 54.4 16.6 c 704
2006-06-25 23:55:55 C 19 46 47.08 -16 04 01.6 16.7 r 130
2006-06-26 00:03:55 C 19 46 46.49 -16 04 15.7 16.9 r 130
2006-06-26 08:02:31 C 19 46 11.01 -16 17 36.5 16.3 c 704
2006-06-26 08:17:18 C 19 46 09.84 -16 18 01.5 16.3 c 704
2006-06-26 08:32:04 C 19 46 08.67 -16 18 26.2 16.6 c 704
2006-06-26 08:46:52 C 19 46 07.50 -16 18 51.7 17.1 c 704
2006-06-26 09:01:34 C 19 46 06.31 -16 19 15.5 16.4 c 704
2006-06-29 15:42:00 C 19 40 05.01 -18 30 22.5 r 379
2006-06-29 15:52:30 C 19 40 04.12 -18 30 39.9 r 379
2006-06-29 16:06:28 C 19 40 02.96 -18 31 02.8 r 379
2006-06-29 16:19:36 C 19 40 01.81 -18 31 25.1 r 379
2006-06-29 16:30:38 C 19 40 00.89 -18 31 43.2 r 379
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)