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
2020-05-02 22:41:44 C 15 20 29.94 +68 01 30.1 q Z36
2020-05-02 22:42:53 C 15 20 29.91 +68 01 27.5 q Z36
2020-05-02 22:44:00 C 15 20 29.88 +68 01 25.8 q Z36
2020-05-02 22:45:08 C 15 20 29.86 +68 01 23.1 q Z36
2020-05-02 22:46:17 C 15 20 29.80 +68 01 21.2 q Z36
2020-05-02 22:47:24 C 15 20 29.81 +68 01 18.6 q Z36
2020-05-02 22:48:32 C 15 20 29.77 +68 01 16.4 q Z36
2020-05-02 22:49:41 C 15 20 29.73 +68 01 14.1 q Z36
2020-05-02 22:50:50 C 15 20 29.70 +68 01 11.9 q Z36
2020-05-02 22:51:57 C 15 20 29.67 +68 01 09.7 q Z36
2020-05-02 22:53:05 C 15 20 29.67 +68 01 07.1 q Z36
2020-05-02 22:54:14 C 15 20 29.63 +68 01 04.9 q Z36
2020-05-02 22:55:22 C 15 20 29.64 +68 01 02.7 q Z36
2020-05-02 22:56:30 C 15 20 29.55 +68 01 00.4 q Z36
2020-05-03 11:02:11 C 15 20 21.56 +67 36 01.0 V T05
2020-05-03 11:06:10 C 15 20 21.44 +67 35 52.6 V T05
2020-05-03 11:16:07 C 15 20 21.17 +67 35 31.8 V T05
2020-05-03 11:30:57 C 15 20 20.71 +67 35 00.6 V T05
2020-05-03 16:34:16 C 15 20 19.06 +67 24 20.7 q D29
2020-05-03 16:50:51 C 15 20 18.61 +67 23 45.7 q D29
2020-05-03 17:07:28 C 15 20 18.16 +67 23 10.8 q D29
2020-05-05 08:03:31 C 15 19 59.55 +66 00 03.5 V 703
2020-05-05 08:11:06 C 15 19 59.34 +65 59 46.8 V 703
2020-05-05 08:18:42 C 15 19 59.15 +65 59 30.5 V 703
2020-05-05 08:26:17 C 15 19 58.95 +65 59 13.7 V 703
2020-05-05 09:42:50 C 15 20 00.31 +65 56 32.0 V T08
2020-05-05 09:45:29 C 15 20 00.24 +65 56 26.3 V T08
2020-05-05 09:49:27 C 15 20 00.13 +65 56 17.8 V T08
2020-05-05 09:57:34 C 15 19 59.92 +65 56 00.3 V T08
2020-05-05 12:21:35 C 15 19 55.929 +65 50 45.15 U F51
2020-05-05 12:33:48 C 15 19 55.603 +65 50 18.02 U F51
2020-05-05 12:45:56 C 15 19 55.292 +65 49 50.98 U F51
2020-05-06 00:33:44 C 15 19 55.18 +65 23 41.8 q I15
2020-05-06 00:34:48 C 15 19 55.17 +65 23 39.9 q I15
2020-05-06 00:35:54 C 15 19 55.17 +65 23 37.1 q I15
2020-05-07 10:07:41 C 15 19 36.17 +64 09 08.0 V T05
2020-05-07 10:10:19 C 15 19 36.10 +64 09 02.4 V T05
2020-05-07 10:14:17 C 15 19 36.07 +64 08 53.3 V T05
2020-05-07 10:21:31 C 15 19 35.77 +64 08 36.9 V T05
2020-05-08 08:14:18 S 15 23 13.721 +63 03 52.88 V C57
2020-05-08 08:14:18 s 1 -118536.33 0 +362678.94 9910.0 C57
2020-05-08 08:44:18 S 15 23 13.435 +63 02 49.24 V C57
2020-05-08 08:44:18 s 1 -119417.51 5 +361898.15 6950.0 C57
2020-05-08 09:14:18 S 15 23 13.186 +63 01 44.47 V C57
2020-05-08 09:14:18 s 1 -120295.80 3 +361108.98 2430.0 C57
2020-05-08 10:14:18 S 15 23 12.514 +62 59 38.54 V C57
2020-05-08 10:14:18 s 1 -122043.56 4 +359505.44 8550.0 C57
2020-05-08 10:44:18 S 15 23 12.365 +62 58 32.74 V C57
2020-05-08 10:44:18 s 1 -122912.97 5 +358691.04 9150.0 C57
2020-05-08 11:14:18 S 15 23 11.962 +62 57 30.74 V C57
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)