British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community

Spectral Comet NEOWISE (improved version)


Expand image

About this observation
James Weightman
Time of observation
27/07/2027 - 23:40
Comet C/2020 F3 NEOWISE
Observing location
Cirencester, Glos UK
Canon 100D DSLR +100mm lens
Star Analyser 100 grating
1.3 degree prism
Various stepping rings
Fixed tripod + tracker
20 x 20secs ISO1600

Crude spectrum obtained by placing grating and prism in front of camera lens. (The main purpose of the prism was to centre the spectrum and thus making finding them much easier!) This image show the main components of the spectrum of the comet's head especially the bright green C2 band which often causes the greenish tinge in images. As bonus the banded spectrum of a M type star can be made out top right, later identified as SAO 62754 Mag6.5, Spec M3III.

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.