In addition, unlike the other three, Ijiraq's spectrum does not display a weak absorption near 0.7 μm.

The 'e' notation indicates the spectrum displays emission lines, which means this is a Be star that is surrounded by hot, circumstellar gas.

The spectrum displays anomalously high levels of carbon.

The spectra of these objects display absorption around 1.55 micrometers.

The chromosphere of this star is active, and its spectrum displays a strong emission line of singly ionized magnesium at a wavelength of 280 nm.

The spectrum displays at least double the normal abundances of elements like magnesium, aluminum and silicon, while helium and scandium are under-abundant.

The spectra of M31 displayed a continuum of frequencies, superimposed with dark absorption lines that help identify the chemical composition of an object.

The spectrum for this star displays an abnormally low level of beryllium, which may be caused by some type of mixing process.

The spectrum of the star is displaying emission lines of hydrogen overlaid on the star's normal spectra.

The spectrum of this asteroid also displays a band feature near 2.9 μm that indicate the presence of a hydrated mineral.