137199 (1999 KX4)


Number 137199
Provisional Designation 1999 KX4
Type Amor, NEO
Absolute Magnitude, H 16.9
Rotation period 2.767 h
Eccentricity 0.2923
Semi-major axis 1.457 au
Inclination 16.57 °
Discovery Date 1999-05-20
Discovery Means LINEAR at Socorro

Radar Experiments

Doppler-Only (Continuous Wave) Echo Power Spectra


2013-05-11, 1999KX4.2013May11.sp34Hz.cw.png

2013-05-11, 1999KX4.2013May11.sp34Hz.cw.png


Echo power spectrum obtained on 2013-5-11 smoothed to a frequency resolution of 0.34 Hz. Power in the opposite circular (OC) polarization as transmitted is the solid line while the power in the same circular (SC) polarization as transmitted is the dashed line. The polariation ratio on this date was 0.55.

Observation Date: 2013-05-11 (07:04:20-08:00:07)

Resolution: 0.34 Hz

Polarization Ratio: 0.55

Download Options:

CSV file is the raw data corresponding to the viewed cw spectra. The CSV file consists of three columns. The first column is the doppler frequency (Hz), the second column is the echo power in the same sense (SC) and the third column is the echo power in the opposite sense (OC). Echo power is in units of standard deviation above the noise baseline.

Additional Information

  • NASA Jet Propulsion Laboratory Small-Body Database entry


Get the solar system in your inbox.

Sign up for LPI's email newsletters