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
2005-12-24 12:17:25 C 11 31 18.48 +11 25 50.3 r 703
2005-12-24 12:30:40 C 11 31 21.10 +11 25 54.1 r 703
2005-12-24 12:43:51 C 11 31 23.80 +11 26 00.4 r 703
2005-12-27 10:58:12 C 11 46 16.17 +11 57 02.8 r 703
2005-12-27 11:06:12 C 11 46 17.86 +11 57 07.3 r 703
2005-12-27 11:14:07 C 11 46 19.56 +11 57 10.3 r 703
2005-12-27 11:22:05 C 11 46 21.25 +11 57 13.6 r 703
2005-12-29 10:14:32 C 11 56 36.61 +12 19 09.4 r H45
2005-12-29 10:16:56 C 11 56 37.14 +12 19 10.2 r H45
2005-12-29 10:19:33 C 11 56 37.70 +12 19 11.7 r H45
2005-12-29 10:21:29 C 11 56 38.11 +12 19 12.9 r H45
2005-12-29 10:23:17 C 11 56 38.46 +12 19 13.8 r H45
2005-12-30 11:44:51 C 12 02 18.04 +12 31 28.7 r 683
2005-12-30 12:04:31 C 12 02 22.30 +12 31 38.2 r 683
2005-12-30 12:24:20 C 12 02 26.62 +12 31 48.1 r 683
2006-01-02 10:25:26 C 12 18 27.78 +13 06 35.7 r H45
2006-01-02 10:27:59 C 12 18 28.39 +13 06 37.4 r H45
2006-01-02 10:29:51 C 12 18 28.83 +13 06 39.2 r H45
2006-01-03 10:51:03 C 12 24 10.52 +13 19 02.4 r H45
2006-01-03 10:53:06 C 12 24 10.99 +13 19 04.1 r H45
2006-01-03 10:56:57 C 12 24 11.90 +13 19 06.4 r H45
2006-01-03 10:58:48 C 12 24 12.32 +13 19 06.5 r H45
2006-01-04 11:39:27 C 12 30 02.73 +13 31 47.5 r 703
2006-01-04 11:47:18 C 12 30 04.57 +13 31 51.5 r 703
2006-01-04 11:55:10 C 12 30 06.40 +13 31 55.8 r 703
2006-01-04 12:03:03 C 12 30 08.24 +13 31 59.9 r 703
2006-01-06 10:09:15 C 12 41 12.66 +13 55 47.9 r H45
2006-01-06 10:11:40 C 12 41 13.23 +13 55 49.0 r H45
2006-01-06 10:13:28 C 12 41 13.68 +13 55 50.0 r H45
2006-01-06 10:15:30 C 12 41 14.11 +13 55 51.0 r H45
2006-01-06 10:17:16 C 12 41 14.54 +13 55 51.3 r H45
2006-01-09 10:15:04 C 12 58 54.42 +14 33 01.6 r H45
2006-01-09 10:17:25 C 12 58 54.95 +14 33 02.5 r H45
2006-01-09 10:21:12 C 12 58 55.78 +14 33 04.6 r H45
2006-01-09 10:23:37 C 12 58 56.47 +14 33 06.1 r H45
2006-01-09 10:25:45 C 12 58 56.96 +14 33 07.0 r H45
2006-01-13 04:16:01 C 13 21 30.94 +15 18 08.1 r 084
2006-01-13 04:18:08 C 13 21 31.46 +15 18 09.0 r 084
2006-01-14 10:02:40 C 13 29 06.20 +15 32 39.7 r H45
2006-01-14 10:04:20 C 13 29 06.71 +15 32 41.1 r H45
2006-01-14 10:05:50 C 13 29 07.06 +15 32 41.3 r H45
2006-01-22 13:03:30 C 14 19 03.21 +16 55 33.2 c 670
2006-01-22 14:10:20 C 14 19 19.89 +16 55 56.2 c 670
2006-01-24 10:55:25 C 14 30 42.05 +17 11 20.3 r H45
2006-01-24 10:57:29 C 14 30 42.59 +17 11 20.9 r H45
2006-01-24 10:59:17 C 14 30 43.02 +17 11 21.4 r H45
2006-01-24 11:02:53 C 14 30 43.83 +17 11 22.0 r H45
2006-01-31 01:50:56 C 15 09 58.32 +17 53 12.4 o 198
2006-01-31 01:51:51 C 15 09 58.54 +17 53 12.4 o 198
2006-02-04 11:49:50 C 15 34 48.49 +18 09 52.6 18.1 c 704
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)