NOAO < IMAGE GALLERY < Procyon spectrum

High resolution spectrum of Procyon

[Procyon spectrum]

About this image

A high resolution version of the spectrum of the sub-giant star Procyon, also known as Alpha Canis Minoris (spectral type F5). This image was created from a digital version of the outstanding photographic atlas observed with the Mount Wilson 100-inch reflector and published in 1979 (Griffin, R.E. and Griffin, R., Cambridge, U.K.). The data were obtained from the Astronomical Data Center at NASA Goddard Space Flight Center. The images shown here were created to mimic an echelle spectrum, with wavelength increasing from left to right along each strip, and from bottom to top. Each of the 50 slices covers 60 angstroms, for a complete spectrum across the visual range from 4000 to 7000 angstroms. This image covers the same wavelength range in the same format as the spectrum of Arcturus, type K1 (or K2), and the spectrum of our own Sun, type G2. (Note for interested users: because this was made from digital data, we can create any size or shape on request, but please give us plenty of time! The images here have the correct aspect ratio for a 35mm slide).

More: stars page.


Minimum credit line: N.A.Sharp, NOAO/AURA/NSF

Downloadable versions:
300 x 200 14 kb color JPEG (on this page)
600 x 400 51 kb color JPEG
1536 x 1024 248 kb color JPEG
3071 x 2048 624 kb color JPEG
8192 x 5464 2.6 Mb color JPEG
8192 x 5464 43.7 Mb 8-bit color TIFF
8192 x 5464 131.2 Mb 24-bit color TIFF
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