M4 -- CAT's EYE NEBULA

Object

Type                      Globular Cluster

Constellation            Scorpius

Distance                 7200 light years

Magnitude               5.6

Size                       36.0 arc-min

Image

Date                       2007-08-10

Place                      RMCC Observatory (Mounds)

Exposure Data          LRGB  15:15:15:15 mins @ -5C

                             Lum 3x5, R 3x5, G 3x5, B 3x5

Notes                     R, G, B filters binned 2x2

Equipment

Optics                    Takahashi TOA-150

Focal Length            1100 mm @f/7.3

Mount                     Takahashi NJP

Camera                   SBIG ST-10XME

Focuser                  RoboFocus

Filters                     CFW-10, Astrodon LRGB

Software                 TheSky6, CCDSoft, CCDAutopilot3, CCDStack, PhotoShop CS