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
2020-06-01 18:44:57 C 15 18 16.01 +34 56 05.6 – V C40
2020-06-01 18:47:05 C 15 18 16.02 +34 55 58.4 – V C40
2020-06-01 18:51:21 C 15 18 16.03 +34 55 44.0 – V C40
2020-06-01 18:52:25 C 15 18 16.02 +34 55 40.4 – V C40
2020-06-01 18:53:30 C 15 18 16.03 +34 55 36.8 – V C40
2020-06-01 19:12:50 C 15 18 16.05 +34 54 31.7 – V C40
2020-06-01 19:20:20 C 15 18 16.06 +34 54 06.3 – V C40
2020-06-01 19:23:32 C 15 18 16.06 +34 53 55.6 – V C40
2020-06-01 19:24:36 C 15 18 16.06 +34 53 52.0 – V C40
2020-06-01 19:25:40 C 15 18 16.06 +34 53 48.2 – V C40
2020-06-01 19:28:52 C 15 18 16.06 +34 53 37.6 – V C40
2020-06-01 19:37:26 C 15 18 16.07 +34 53 08.4 – V C40
2020-06-01 19:38:30 C 15 18 16.07 +34 53 04.9 – V C40
2020-06-01 19:39:36 C 15 18 16.07 +34 53 01.2 – V C40
2020-06-01 19:41:44 C 15 18 16.07 +34 52 54.1 – V C40
2020-06-01 19:43:52 C 15 18 16.08 +34 52 46.9 – V C40
2020-06-01 19:47:04 C 15 18 16.08 +34 52 35.9 – V C40
2020-06-01 19:57:26 C 15 18 16.10 +34 52 00.8 – V C40
2020-06-02 04:28:27 C 15 18 20.68 +34 23 12.4 – V V93
2020-06-02 05:25:54 C 15 18 20.74 +34 19 57.8 – V V93
2020-06-02 06:14:37 C 15 18 20.81 +34 17 11.7 – V V93
2020-06-03 03:50:52 C 15 18 34.25 +33 03 50.5 – u H21
2020-06-03 03:53:31 C 15 18 34.25 +33 03 41.7 – u H21
2020-06-03 03:56:02 C 15 18 34.25 +33 03 33.1 – u H21
2020-06-03 03:58:33 C 15 18 34.26 +33 03 24.6 – u H21
2020-06-03 04:01:04 C 15 18 34.27 +33 03 16.1 – u H21
2020-06-03 04:03:35 C 15 18 34.27 +33 03 07.4 – u H21
2020-06-03 04:06:11 C 15 18 34.27 +33 02 58.6 – u H21
2020-06-03 04:08:53 C 15 18 34.28 +33 02 49.4 – u H21
2020-06-03 04:11:24 C 15 18 34.28 +33 02 40.9 – u H21
2020-06-03 04:13:55 C 15 18 34.29 +33 02 32.3 – u H21
2020-06-03 04:16:26 C 15 18 34.29 +33 02 23.7 – u H21
2020-06-03 04:18:58 C 15 18 34.29 +33 02 15.2 – u H21
2020-06-03 04:21:29 C 15 18 34.30 +33 02 06.6 – u H21
2020-06-03 04:24:00 C 15 18 34.31 +33 01 58.1 – u H21
2020-06-03 04:26:31 C 15 18 34.31 +33 01 49.5 – u H21
2020-06-03 04:29:02 C 15 18 34.31 +33 01 40.8 – u H21
2020-06-03 04:31:33 C 15 18 34.32 +33 01 32.3 – u H21
2020-06-03 04:34:04 C 15 18 34.32 +33 01 23.7 – u H21
2020-06-03 04:36:35 C 15 18 34.33 +33 01 15.2 – u H21
2020-06-03 04:39:29 C 15 18 34.33 +33 01 05.3 – u H21
2020-06-03 09:45:08 C 15 18 37.10 +32 43 54.8 – V T05
2020-06-03 09:57:16 C 15 18 37.12 +32 43 13.3 – V T05
2020-06-03 10:09:41 C 15 18 37.13 +32 42 30.7 – V T05
2020-06-03 10:17:08 C 15 18 37.13 +32 42 05.3 – V T05
2020-06-03 17:57:59 C 15 18 43.60 +32 15 41.8 – V C40
2020-06-03 18:03:19 C 15 18 43.64 +32 15 23.6 – V C40
2020-06-03 18:04:24 C 15 18 43.64 +32 15 20.0 – V C40
2020-06-03 18:05:28 C 15 18 43.65 +32 15 16.4 – V C40
2020-06-03 18:07:36 C 15 18 43.66 +32 15 09.1 – 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)