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
2024-11-09 05:28:56 C 01 15 01.336 -25 06 54.00 V G96
2024-11-09 05:36:40 C 01 15 00.922 -25 06 51.52 V G96
2024-11-09 05:44:22 C 01 15 00.500 -25 06 49.25 V G96
2024-11-09 05:52:05 C 01 15 00.076 -25 06 47.02 V G96
2024-11-19 02:50:15 C 01 04 49.056 -23 31 45.98 V W68
2024-11-19 02:54:57 C 01 04 48.842 -23 31 44.29 V W68
2024-11-19 03:02:50 C 01 04 48.588 -23 31 40.37 V W68
2024-11-19 03:19:21 C 01 04 48.019 -23 31 31.98 V W68
2024-12-28 02:09:37 C 01 05 58.888 -12 50 33.32 V G96
2024-12-28 02:17:02 C 01 05 59.136 -12 50 27.82 V G96
2024-12-28 02:24:28 C 01 05 59.370 -12 50 21.66 V G96
2024-12-28 02:31:53 C 01 05 59.546 -12 50 15.90 V G96
2025-01-11 02:54:37 C 01 19 10.798 -08 16 52.61 V G96
2025-01-11 03:02:46 C 01 19 11.190 -08 16 46.78 V G96
2025-01-11 03:10:53 C 01 19 11.521 -08 16 40.15 V G96
2025-01-11 03:19:00 C 01 19 11.874 -08 16 33.24 V G96
2025-02-03 12:56:55 C 01 51 18.904 -00 28 33.58 O18
2025-02-03 14:13:20 C 01 51 23.956 -00 27 29.45 O18
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)