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
2020-06-07 19:29:19 C 15 19 58.46 +26 42 44.0 – V C40
2020-06-07 19:31:27 C 15 19 58.48 +26 42 36.9 – V C40
2020-06-07 19:33:36 C 15 19 58.50 +26 42 29.5 – V C40
2020-06-07 22:00:27 C 15 19 59.77 +26 34 07.1 – V C40
2020-06-07 22:09:02 C 15 19 59.85 +26 33 37.7 – V C40
2020-06-07 22:10:05 C 15 19 59.86 +26 33 33.9 – V C40
2020-06-07 22:12:14 C 15 19 59.89 +26 33 26.6 – V C40
2020-06-07 22:14:23 C 15 19 59.91 +26 33 19.3 – V C40
2020-06-07 22:18:40 C 15 19 59.95 +26 33 04.7 – V C40
2020-06-07 22:25:05 C 15 20 00.02 +26 32 42.6 – V C40
2020-06-07 22:32:34 C 15 20 00.09 +26 32 16.8 – V C40
2020-06-07 22:35:48 C 15 20 00.11 +26 32 05.7 – V C40
2020-06-07 23:08:40 C 15 20 00.47 +26 30 12.4 – V C40
2020-06-07 23:09:44 C 15 20 00.47 +26 30 08.8 – V C40
2020-06-07 23:11:54 C 15 20 00.50 +26 30 01.3 – V C40
2020-06-07 23:12:58 C 15 20 00.51 +26 29 57.7 – V C40
2020-06-07 23:22:36 C 15 20 00.62 +26 29 24.6 – V C40
2020-06-07 23:37:34 C 15 20 00.80 +26 28 32.9 – V C40
2020-06-08 03:24:34 C 15 20 06.09 +26 15 46.5 – V V94
2020-06-08 03:59:25 C 15 20 06.36 +26 13 48.0 – V V94
2020-06-08 04:34:38 C 15 20 06.64 +26 11 48.2 – V V94
2020-06-08 18:10:54 C 15 20 20.27 +25 25 27.8 – V C40
2020-06-08 18:13:02 C 15 20 20.28 +25 25 20.6 – V C40
2020-06-08 18:14:06 C 15 20 20.30 +25 25 17.0 – V C40
2020-06-08 18:16:16 C 15 20 20.32 +25 25 09.9 – V C40
2020-06-08 18:17:20 C 15 20 20.33 +25 25 06.3 – V C40
2020-06-08 18:19:28 C 15 20 20.36 +25 24 58.9 – V C40
2020-06-08 18:20:32 C 15 20 20.36 +25 24 55.5 – V C40
2020-06-08 18:21:36 C 15 20 20.37 +25 24 51.8 – V C40
2020-06-08 18:22:40 C 15 20 20.39 +25 24 47.9 – V C40
2020-06-08 18:24:48 C 15 20 20.41 +25 24 40.9 – V C40
2020-06-08 18:25:52 C 15 20 20.42 +25 24 37.2 – V C40
2020-06-08 18:26:58 C 15 20 20.43 +25 24 33.7 – V C40
2020-06-08 18:28:02 C 15 20 20.44 +25 24 29.9 – V C40
2020-06-08 18:29:06 C 15 20 20.44 +25 24 26.2 – V C40
2020-06-08 18:30:10 C 15 20 20.45 +25 24 22.7 – V C40
2020-06-08 18:31:14 C 15 20 20.46 +25 24 19.2 – V C40
2020-06-08 18:32:17 C 15 20 20.48 +25 24 15.4 – V C40
2020-06-08 18:33:22 C 15 20 20.49 +25 24 11.8 – V C40
2020-06-08 18:34:26 C 15 20 20.51 +25 24 08.1 – V C40
2020-06-08 18:36:35 C 15 20 20.51 +25 24 00.9 – V C40
2020-06-08 18:37:39 C 15 20 20.52 +25 23 57.3 – V C40
2020-06-08 18:40:52 C 15 20 20.56 +25 23 46.5 – V C40
2020-06-08 18:42:59 C 15 20 20.58 +25 23 39.1 – V C40
2020-06-08 18:44:03 C 15 20 20.59 +25 23 35.7 – V C40
2020-06-08 18:45:07 C 15 20 20.59 +25 23 31.9 – V C40
2020-06-08 18:46:12 C 15 20 20.62 +25 23 28.3 – V C40
2020-06-08 18:48:21 C 15 20 20.63 +25 23 21.2 – V C40
2020-06-08 18:49:25 C 15 20 20.65 +25 23 17.5 – V C40
2020-06-08 18:50:30 C 15 20 20.64 +25 23 13.9 – 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)