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
2020-01-20 04:04:31 C 06 20 56.60 +38 25 13.9 – V 703
2020-01-20 04:12:12 C 06 20 55.62 +38 25 37.9 – V 703
2020-01-20 04:14:22 S 06 19 38.158 +38 28 36.08 – V C57
2020-01-20 04:14:22 s 1 -151410.16 7 + 3992.020 4800.0 – C57
2020-01-20 04:19:54 C 06 20 54.64 +38 26 01.2 – V 703
2020-01-20 04:27:35 C 06 20 53.72 +38 26 26.4 – V 703
2020-01-20 04:44:23 S 06 19 36.492 +38 29 53.66 – V C57
2020-01-20 04:44:23 s 1 -149352.03 0 + 1265.737 3690.0 – C57
2020-01-20 05:14:23 S 06 19 33.086 +38 31 15.60 – V C57
2020-01-20 05:14:23 s 1 -147237.97 4 - 1461.036 5940.0 – C57
2020-01-20 05:44:22 S 06 19 30.401 +38 32 36.38 – V C57
2020-01-20 05:44:22 s 1 -145066.40 4 - 4187.256 8700.0 – C57
2020-01-20 06:14:23 S 06 19 28.214 +38 33 54.90 – V C57
2020-01-20 06:14:23 s 1 -142835.67 0 - 6911.787 8990.0 – C57
2020-01-20 06:44:23 S 06 19 25.586 +38 35 19.18 – V C57
2020-01-20 06:44:23 s 1 -140544.06 5 - 9633.394 3720.0 – C57
2020-01-20 07:14:22 S 06 19 23.342 +38 36 37.08 – V C57
2020-01-20 07:14:22 s 1 -138189.82 8 -12350.731 9650.0 – C57
2020-01-20 10:17:34 C 06 20 11.19 +38 44 31.3 – V T05
2020-01-20 10:22:57 C 06 20 10.50 +38 44 47.7 – V T05
2020-01-20 10:30:53 C 06 20 09.49 +38 45 11.7 – V T05
2020-01-20 10:45:05 C 06 20 07.67 +38 45 54.9 – V T05
2020-01-21 15:05:51 C 06 16 50.154 +40 12 59.22 – q O85
2020-01-21 15:11:14 C 06 16 49.464 +40 13 15.85 – q O85
2020-01-21 18:46:15 C 06 16 25.73 +40 23 59.8 – V G33
2020-01-21 18:47:16 C 06 16 25.57 +40 24 02.6 – V G33
2020-01-21 18:49:48 C 06 16 25.27 +40 24 10.8 – V G33
2020-01-21 18:50:42 C 06 16 25.12 +40 24 13.7 – V G33
2020-01-21 18:51:31 C 06 16 24.98 +40 24 15.6 – V G33
2020-01-21 18:52:34 C 06 16 24.86 +40 24 18.9 – V G33
2020-01-21 18:53:35 C 06 16 24.73 +40 24 22.0 – V G33
2020-01-21 18:54:24 C 06 16 24.65 +40 24 24.4 – V G33
2020-01-21 18:56:38 C 06 16 24.33 +40 24 31.5 – V G33
2020-01-21 18:57:28 C 06 16 24.27 +40 24 34.0 – V G33
2020-01-21 18:58:14 C 06 16 24.20 +40 24 36.6 – V G33
2020-01-22 00:22:20 C 06 15 46.38 +40 41 17.9 – q W46
2020-01-22 00:53:21 C 06 15 42.43 +40 42 54.7 – q W46
2020-01-22 00:59:21 C 06 15 41.65 +40 43 13.6 – q W46
2020-01-22 08:30:11 C 06 14 46.34 +41 06 26.5 – V T08
2020-01-22 08:38:39 C 06 14 45.24 +41 06 52.7 – V T08
2020-01-22 08:44:47 C 06 14 44.40 +41 07 11.2 – V T08
2020-01-22 08:46:46 C 06 14 44.12 +41 07 17.2 – V T08
2020-01-22 08:51:58 C 06 14 43.44 +41 07 33.0 – V T08
2020-01-22 08:56:49 C 06 14 42.79 +41 07 47.8 – V T08
2020-01-22 23:32:58 C 06 12 56.82 +41 52 00.6 – V 160
2020-01-22 23:35:55 C 06 12 56.44 +41 52 09.4 – V 160
2020-01-22 23:38:44 C 06 12 56.08 +41 52 17.9 – V 160
2020-01-23 22:37:51 C 06 10 09.73 +43 01 58.6 – V 160
2020-01-23 22:40:30 C 06 10 09.37 +43 02 06.6 – V 160
2020-01-23 22:43:12 C 06 10 09.01 +43 02 14.6 – V 160
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)