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M 95

Spiralna galaksija - Spiral Galaxy M95 (NGC 3351), type SBb, in leo

Rektascenzija 10 : 44.0 (u:m)
Deklinacija +11 : 42 (sto:m)
Razdalja 38000 (*1000 sv.l.)
Vizual. magnituda 9.7 (mag)
Zorni kot 4.4x3.3 (loc min)

M95 was one of the galaxies in the key project of the Hubble Space Telescope for the determination of the Hubble constant: the HST was employed to look for Cepheid variables and thereby determine this galaxy's distance. A preliminary result has been obtained and published in 1996-97 by the HST H0 Key Project Team, J.A. Graham et.al., The Extragalactic Distance Scale Key Project VII. The Discovery of Cepheids in the Leo I Group Galaxy NGC 3351. Their result, corrected for the semi-recent adjustment of the Cepheid brightness zero point by ESA's Hipparcos astrometrical satellite, is a distance of 35.5+-3.1 million light years. This is in semi-good agreement with the value of about 41 million light years (after correction for Hipparcos results) which had been obtained earlier by Nial R. Tanvir for its neighbor M96, and implies a distance of all the galaxies in the Leo I or M96 group of about 38 million light years.

M95 is a barred spiral of type SBb, or SB(r)ab according to de Vaucouleurs' classification, with nearly circular arms. Alan Sandage, in the Hubble Atlas of Galaxies, calls it a "typical ringed galaxy".

Vec posnetkov M95

Povzeto po:
Hartmut Frommert (spider@seds.org)
Christine Kronberg (smil@lrz.uni-muenchen.de)

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