Why is there no trace of MSI?

Purple microsatellite has no trace, because its light will not be scattered or absorbed when it passes through the earth's atmosphere. Purple MSI is a very bright star, located between Sirius and Beihe III. It seems to have no trace because its light will not be scattered or absorbed when it passes through the earth's atmosphere. The stars we see in the night sky will be refracted by the atmosphere before entering our eyes, and the atmosphere will absorb and scatter light with different wavelengths to varying degrees. Because the light emitted by MSI is mainly concentrated in red and yellow bands, these bands pass through the atmosphere more easily than other bands, so when we see it in the night sky, we can hardly see the trace.