IAA RAS IAA Minor Planet Database

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
2020-06-08 18:52:37 C 15 20 20.66 +25 23 06.6 – V C40
2020-06-08 18:58:26 C 15 20 20.72 +25 22 46.8 – V C40
2020-06-08 18:59:30 C 15 20 20.73 +25 22 43.3 – V C40
2020-06-08 19:01:38 C 15 20 20.75 +25 22 35.9 – V C40
2020-06-08 19:02:42 C 15 20 20.76 +25 22 32.5 – V C40
2020-06-08 19:07:00 C 15 20 20.80 +25 22 17.7 – V C40
2020-06-08 19:08:04 C 15 20 20.82 +25 22 14.2 – V C40
2020-06-08 19:10:12 C 15 20 20.83 +25 22 07.0 – V C40
2020-06-08 19:11:16 C 15 20 20.85 +25 22 03.5 – V C40
2020-06-08 19:12:21 C 15 20 20.86 +25 21 59.7 – V C40
2020-06-08 19:14:30 C 15 20 20.88 +25 21 52.5 – V C40
2020-06-08 19:17:43 C 15 20 20.91 +25 21 41.6 – V C40
2020-06-08 19:19:50 C 15 20 20.93 +25 21 34.3 – V C40
2020-06-08 19:20:54 C 15 20 20.94 +25 21 30.6 – V C40
2020-06-08 19:25:12 C 15 20 20.97 +25 21 15.9 – V C40
2020-06-08 19:26:16 C 15 20 20.98 +25 21 12.4 – V C40
2020-06-08 19:27:20 C 15 20 21.00 +25 21 08.8 – V C40
2020-06-08 19:28:24 C 15 20 21.01 +25 21 05.1 – V C40
2020-06-08 19:32:40 C 15 20 21.05 +25 20 50.7 – V C40
2020-06-08 19:33:46 C 15 20 21.06 +25 20 47.0 – V C40
2020-06-08 19:36:58 C 15 20 21.08 +25 20 36.0 – V C40
2020-06-08 21:20:55 C 15 20 22.10 +25 14 41.6 – V C40
2020-06-08 21:21:59 C 15 20 22.10 +25 14 38.1 – V C40
2020-06-08 21:32:42 C 15 20 22.21 +25 14 01.6 – V C40
2020-06-08 21:44:27 C 15 20 22.33 +25 13 21.2 – V C40
2020-06-09 03:07:50 C 15 20 28.47 +24 55 06.7 – q I15
2020-06-09 03:09:25 C 15 20 28.43 +24 55 00.8 – q I15
2020-06-09 03:11:00 C 15 20 28.43 +24 54 55.3 – q I15
2020-06-09 09:27:29 C 15 20 34.34 +24 33 49.4 – V T08
2020-06-09 09:38:21 C 15 20 34.43 +24 33 12.5 – V T08
2020-06-09 09:42:59 C 15 20 34.46 +24 32 56.8 – V T08
2020-06-09 18:11:38 C 15 20 44.32 +24 04 00.5 – V C40
2020-06-09 18:12:42 C 15 20 44.33 +24 03 56.9 – V C40
2020-06-09 18:14:51 C 15 20 44.35 +24 03 49.7 – V C40
2020-06-09 18:19:08 C 15 20 44.40 +24 03 35.3 – V C40
2020-06-09 18:23:24 C 15 20 44.45 +24 03 20.9 – V C40
2020-06-09 18:25:33 C 15 20 44.47 +24 03 13.8 – V C40
2020-06-09 18:27:42 C 15 20 44.48 +24 03 06.5 – V C40
2020-06-09 18:29:51 C 15 20 44.51 +24 02 59.4 – V C40
2020-06-09 18:31:58 C 15 20 44.54 +24 02 52.1 – V C40
2020-06-09 18:35:11 C 15 20 44.56 +24 02 41.3 – V C40
2020-06-09 18:41:36 C 15 20 44.64 +24 02 19.5 – V C40
2020-06-09 18:42:40 C 15 20 44.65 +24 02 16.0 – V C40
2020-06-09 18:43:44 C 15 20 44.65 +24 02 12.4 – V C40
2020-06-09 18:53:21 C 15 20 44.76 +24 01 40.0 – V C40
2020-06-09 18:54:00 C 15 20 44.77 +24 01 37.8 – V C40
2020-06-09 19:01:31 C 15 20 44.83 +24 01 12.5 – V C40
2020-06-09 19:17:34 C 15 20 45.02 +24 00 18.3 – V C40
2020-06-09 19:19:42 C 15 20 45.04 +24 00 11.1 – V C40
2020-06-09 19:22:54 C 15 20 45.07 +24 00 00.3 – V C40
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)