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
2020-06-14 18:33:59 C 15 23 09.01 +17 23 34.3 – V C40
2020-06-14 18:35:45 C 15 23 09.03 +17 23 28.4 – V C40
2020-06-14 18:36:49 C 15 23 09.05 +17 23 24.9 – V C40
2020-06-14 18:41:05 C 15 23 09.13 +17 23 11.3 – V C40
2020-06-14 18:45:23 C 15 23 09.19 +17 22 57.3 – V C40
2020-06-14 18:46:27 C 15 23 09.21 +17 22 53.7 – V C40
2020-06-14 18:47:31 C 15 23 09.23 +17 22 50.4 – V C40
2020-06-14 18:50:43 C 15 23 09.30 +17 22 40.0 – V C40
2020-06-14 18:51:47 C 15 23 09.30 +17 22 36.6 – V C40
2020-06-14 18:52:51 C 15 23 09.33 +17 22 33.1 – V C40
2020-06-14 18:56:05 C 15 23 09.38 +17 22 22.6 – V C40
2020-06-14 19:02:29 C 15 23 09.50 +17 22 01.7 – V C40
2020-06-14 19:03:33 C 15 23 09.51 +17 21 58.3 – V C40
2020-06-14 19:05:43 C 15 23 09.55 +17 21 51.2 – V C40
2020-06-14 19:16:25 C 15 23 09.74 +17 21 16.5 – V C40
2020-06-14 20:58:47 C 15 23 12.00 +17 15 44.8 – q K73
2020-06-14 21:02:57 C 15 23 12.08 +17 15 31.6 – q K73
2020-06-14 21:08:20 C 15 23 12.17 +17 15 14.0 – q K73
2020-06-15 01:07:44 C 15 23 18.41 +17 02 16.3 – q I15
2020-06-15 01:08:50 C 15 23 18.42 +17 02 12.8 – q I15
2020-06-15 01:09:56 C 15 23 18.45 +17 02 09.3 – q I15
2020-06-15 03:33:35 C 15 23 21.38 +16 54 24.5 – V V94
2020-06-15 03:47:00 C 15 23 21.60 +16 53 41.2 – V V94
2020-06-15 04:26:33 C 15 23 22.28 +16 51 33.0 – V V94
2020-06-15 05:23:24 C 15 23 23.97 +16 48 31.9 – V U71
2020-06-15 05:28:31 C 15 23 24.06 +16 48 15.4 – V U71
2020-06-15 05:33:54 C 15 23 24.13 +16 47 57.8 – V U71
2020-06-15 18:32:53 C 15 23 42.83 +16 05 59.6 – V C40
2020-06-15 18:34:00 C 15 23 42.84 +16 05 55.9 – V C40
2020-06-15 18:35:09 C 15 23 42.87 +16 05 52.2 – V C40
2020-06-15 18:35:43 C 15 23 42.87 +16 05 50.3 – V C40
2020-06-15 18:36:51 C 15 23 42.89 +16 05 46.7 – V C40
2020-06-15 18:37:27 C 15 23 42.90 +16 05 44.7 – V C40
2020-06-15 18:38:00 C 15 23 42.91 +16 05 43.0 – V C40
2020-06-15 18:38:34 C 15 23 42.92 +16 05 41.1 – V C40
2020-06-15 18:39:09 C 15 23 42.92 +16 05 39.4 – V C40
2020-06-15 18:39:42 C 15 23 42.95 +16 05 37.6 – V C40
2020-06-15 18:40:52 C 15 23 42.96 +16 05 33.9 – V C40
2020-06-15 18:41:25 C 15 23 42.98 +16 05 32.0 – V C40
2020-06-15 18:42:00 C 15 23 42.99 +16 05 30.2 – V C40
2020-06-15 18:43:09 C 15 23 43.00 +16 05 26.4 – V C40
2020-06-15 18:45:31 C 15 23 43.05 +16 05 18.9 – V C40
2020-06-15 18:48:43 C 15 23 43.11 +16 05 08.5 – V C40
2020-06-15 18:49:48 C 15 23 43.12 +16 05 05.1 – V C40
2020-06-15 18:50:53 C 15 23 43.15 +16 05 01.7 – V C40
2020-06-15 18:51:57 C 15 23 43.16 +16 04 58.4 – V C40
2020-06-15 18:53:01 C 15 23 43.18 +16 04 54.9 – V C40
2020-06-15 18:54:05 C 15 23 43.20 +16 04 51.4 – V C40
2020-06-15 18:56:13 C 15 23 43.24 +16 04 44.6 – V C40
2020-06-15 18:57:17 C 15 23 43.25 +16 04 41.4 – 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)