Spiral Galaxy in Virgo

Uploaded 5/9/05

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 This field is dominated by the large face on spiral M61, riding high on May evenings within the confines of the Realm of the Galaxies in Virgo. At a bright 10.2 magnitude, the inclination is close to 1 degree, or nearly face on. It is also quite large at 7 arcminutes, and shows intricate details in the arms and core, and is designated as a SAB(rs)bc spiral. A very interesting small 13.4 SAB spiral lies to its upper left - NGC4303A, only 1.5 arcminutes in size. It has bluish arms and some knots in this image. To the upper right is NGC4292, a 12.2 magnitude (R)SBr barred spiral, quite a bit more yellow in color. It's 1.7 arcminutes long and has a B-V index of .9, compared to M61's .5 and NGC4303A which is .41. It is by far the yellowest of the group.
Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: LRGB = 80:20:20:20 (RGB Binned 2x2) RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 7.1 arcsec (Maxim DL - 10min subframe), Transparency 7/10 Outside Temperature: 10 C CCD Temperature: -20 C Processing Tools: Maxim DL, Photoshop, PixInsight, CCDOps Debloomer HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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