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
2003-09-27 10:24:09 C 03 51 27.18 -09 38 03.7 c 711
2003-09-27 10:37:32 C 03 51 27.15 -09 38 10.5 c 711
2003-09-27 10:50:55 C 03 51 27.13 -09 38 17.3 c 711
2003-09-28 10:45:54 C 03 51 26.23 -09 50 31.7 o 699
2003-09-28 11:05:00 C 03 51 26.13 -09 50 41.9 o 699
2003-09-28 11:24:12 C 03 51 26.09 -09 50 51.9 o 699
2003-09-28 11:43:20 C 03 51 25.94 -09 51 01.5 o 699
2003-10-18 09:03:13 C 03 41 04.26 -13 59 41.0 18.2 c 704
2003-10-18 09:19:48 C 03 41 03.45 -13 59 47.6 18.6 c 704
2003-10-18 09:36:23 C 03 41 02.74 -13 59 55.5 18.3 c 704
2003-10-18 09:52:42 C 03 41 01.99 -14 00 03.0 18.4 c 704
2003-10-18 10:09:12 C 03 41 01.19 -14 00 11.4 18.6 c 704
2003-10-24 08:56:12 C 03 34 02.63 -15 05 36.7 o 699
2003-10-24 09:10:39 C 03 34 01.82 -15 05 43.6 o 699
2003-10-24 09:25:00 C 03 34 01.00 -15 05 50.1 o 699
2003-10-24 09:39:25 C 03 34 00.16 -15 05 55.4 o 699
2003-11-25 04:11:10 C 02 39 39.38 -16 03 08.2 r 446
2003-11-25 05:03:31 C 02 39 35.56 -16 02 50.3 r 446
2003-11-25 06:28:47 C 02 39 29.40 -16 02 20.6 r 446
2003-11-26 04:36:55 C 02 37 58.15 -15 54 25.3 18.4 c 704
2003-11-26 04:55:27 C 02 37 56.84 -15 54 18.4 18.6 c 704
2003-11-26 05:13:35 C 02 37 55.52 -15 54 11.2 18.6 c 704
2003-11-26 05:31:59 C 02 37 54.25 -15 54 04.9 18.8 c 704
2003-11-26 05:50:15 C 02 37 52.92 -15 53 57.8 18.7 c 704
2003-12-12 18:03:30 C 02 16 37.81 -12 12 42.3 d 104
2003-12-12 18:11:23 C 02 16 37.49 -12 12 36.1 d 104
2003-12-12 18:23:04 C 02 16 37.10 -12 12 29.0 d 104
2003-12-13 03:30:29 C 02 16 16.83 -12 05 54.2 18.8 c 704
2003-12-13 03:48:06 C 02 16 16.22 -12 05 41.5 18.2 c 704
2003-12-13 04:05:35 C 02 16 15.51 -12 05 29.8 18.2 c 704
2003-12-13 04:23:59 C 02 16 14.85 -12 05 15.4 18.3 c 704
2003-12-14 03:46:01 C 02 15 26.07 -11 48 14.5 18.1 c 644
2003-12-14 04:15:29 C 02 15 24.99 -11 47 52.8 18.0 c 644
2003-12-14 04:45:01 C 02 15 23.92 -11 47 31.2 18.0 c 644
2003-12-18 17:52:28 C 02 12 15.70 -10 23 54.5 c 113
2003-12-18 17:54:04 C 02 12 15.69 -10 23 53.4 c 113
2003-12-18 17:55:39 C 02 12 15.62 -10 23 51.8 c 113
2003-12-18 17:57:14 C 02 12 15.60 -10 23 51.0 c 113
2003-12-18 17:58:49 C 02 12 15.55 -10 23 49.4 c 113
2004-01-25 07:58:33 C 02 24 15.21 +03 21 00.7 t 608
2004-01-25 08:13:51 C 02 24 15.86 +03 21 15.6 t 608
2004-02-17 02:21:14 C 02 57 11.58 +12 07 24.8 19.5 c 704
2004-02-17 02:38:24 C 02 57 12.81 +12 07 41.6 19.7 c 704
2004-02-17 02:55:10 C 02 57 14.04 +12 07 57.2 19.6 c 704
2004-02-17 03:28:38 C 02 57 16.39 +12 08 28.9 20.1 c 704
2004-02-18 02:15:22 C 02 58 59.41 +12 30 08.6 19.3 c 704
2004-02-18 02:32:16 C 02 59 00.66 +12 30 24.8 19.6 c 704
2004-02-18 02:49:17 C 02 59 01.97 +12 30 41.0 19.9 c 704
2004-02-18 03:06:09 C 02 59 03.18 +12 30 56.7 19.9 c 704
2004-03-19 02:45:33 C 04 06 51.41 +23 22 58.9 19.1 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)