M81 Galaxy Group & Integrated Flux Nebula

M81 星系團與共同照耀星雲

Officina Stellare 500 RiFast (1900 f3.8)
FLI Proline 16803
Astrodon LRBG, 5nm Ha
Paramount ME
攝於西藏遙控天文台

共同照耀星雲 (Integrated Flux Nebula) : 
http://www.galaxyimages.com/UNP_IFNebula.html
http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap080512.html