[back] M 91 in Coma Berenice [NED]


 Type SBb, distance ~ 18Mpc/60MLy.




(c) 2004 All astro photo images are copyrighted. They may not be used or reproduced without explicit written permission from the authors.

About this Image / Über dieses Bild

Image Type, Orientation: LRGB Composite, North is at 3:00
Exposure time: L: 12x300 sec. 1x1 bin, R,G,B: 4x300 sec.3x3 bin
Exposure date: May 13th, 2004
Location: Capella Observatory at Amani Lodge, Kupferberg near Windhoek, Namibia
Filter: FR03 + Astronomik
Typ II LRGB filters
Instrument: Ganymed 60cm-Hypergraph in secondary focus, f=4800 mm
Seeing (FWHM): 2.1"
Photographer: Rainer Sparenberg, Stefan Binnewies, Volker Robering
Remarks: M91 is the prototype of a  SBb spiral with bright bars and dim arms of the "Grand Design Type"
Bemerkungen: M91 ist der Prototyp einer SBb-Spirale mit hellem Balken und schwachen Armen vom „Grand Design-Typ“

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