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
2020-06-03 22:05:13 C 15 18 44.53 +32 01 38.4 – V C40
2020-06-03 22:06:16 C 15 18 44.54 +32 01 34.6 – V C40
2020-06-03 22:12:04 C 15 18 44.56 +32 01 14.7 – V C40
2020-06-03 22:13:08 C 15 18 44.57 +32 01 11.2 – V C40
2020-06-03 22:16:20 C 15 18 44.58 +32 01 00.1 – V C40
2020-06-03 22:18:28 C 15 18 44.59 +32 00 52.7 – V C40
2020-06-03 22:19:33 C 15 18 44.60 +32 00 49.0 – V C40
2020-06-03 22:20:38 C 15 18 44.61 +32 00 45.3 – V C40
2020-06-04 07:01:46 C 15 18 50.80 +31 31 16.1 – V G96
2020-06-04 07:09:21 C 15 18 50.82 +31 30 50.1 – V G96
2020-06-04 07:16:54 C 15 18 50.85 +31 30 24.1 – V G96
2020-06-04 07:24:28 C 15 18 50.87 +31 29 58.1 – V G96
2020-06-04 07:45:19 C 15 18 50.93 +31 28 46.3 – V 703
2020-06-04 07:53:10 C 15 18 50.96 +31 28 19.5 – V 703
2020-06-04 08:00:59 C 15 18 50.93 +31 27 52.5 – V 703
2020-06-04 08:08:48 C 15 18 51.01 +31 27 25.6 – V 703
2020-06-05 03:59:46 C 15 19 06.49 +30 19 36.4 – V V93
2020-06-05 04:50:43 C 15 19 06.71 +30 16 42.1 – V V93
2020-06-05 05:49:31 C 15 19 06.98 +30 13 20.9 – V V93
2020-06-05 09:29:07 C 15 19 09.91 +30 01 02.3 – V T08
2020-06-05 09:35:07 C 15 19 09.92 +30 00 41.7 – V T08
2020-06-05 09:43:52 C 15 19 09.95 +30 00 11.7 – V T08
2020-06-05 10:28:32 C 15 19 10.10 +29 57 38.1 – V T08
2020-06-05 18:30:55 C 15 19 17.74 +29 29 56.9 – V C40
2020-06-05 18:31:58 C 15 19 17.75 +29 29 53.4 – V C40
2020-06-05 18:34:00 C 15 19 17.77 +29 29 46.5 – V C40
2020-06-05 18:35:02 C 15 19 17.76 +29 29 43.0 – V C40
2020-06-05 18:39:10 C 15 19 17.79 +29 29 28.9 – V C40
2020-06-05 18:40:13 C 15 19 17.80 +29 29 25.4 – V C40
2020-06-05 18:41:15 C 15 19 17.80 +29 29 21.7 – V C40
2020-06-05 18:42:16 C 15 19 17.82 +29 29 18.3 – V C40
2020-06-05 18:47:26 C 15 19 17.84 +29 29 00.7 – V C40
2020-06-05 18:48:28 C 15 19 17.85 +29 28 57.4 – V C40
2020-06-05 18:49:29 C 15 19 17.86 +29 28 53.8 – V C40
2020-06-05 18:50:31 C 15 19 17.85 +29 28 50.3 – V C40
2020-06-05 18:51:33 C 15 19 17.87 +29 28 46.7 – V C40
2020-06-05 18:52:36 C 15 19 17.87 +29 28 43.2 – V C40
2020-06-05 18:54:38 C 15 19 17.88 +29 28 36.3 – V C40
2020-06-05 18:56:43 C 15 19 17.90 +29 28 29.2 – V C40
2020-06-05 18:57:44 C 15 19 17.90 +29 28 25.7 – V C40
2020-06-05 18:58:46 C 15 19 17.90 +29 28 22.1 – V C40
2020-06-05 18:59:49 C 15 19 17.91 +29 28 18.7 – V C40
2020-06-05 19:00:51 C 15 19 17.92 +29 28 15.2 – V C40
2020-06-05 19:10:10 C 15 19 17.97 +29 27 43.3 – V C40
2020-06-05 19:12:13 C 15 19 17.99 +29 27 36.4 – V C40
2020-06-05 19:13:16 C 15 19 17.99 +29 27 32.9 – V C40
2020-06-05 19:14:18 C 15 19 18.00 +29 27 29.3 – V C40
2020-06-05 19:17:23 C 15 19 18.01 +29 27 18.8 – V C40
2020-06-05 19:18:25 C 15 19 18.03 +29 27 15.2 – V C40
2020-06-05 19:19:26 C 15 19 18.03 +29 27 11.8 – 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)