Catalogue and alternative designations

IC 4406, Retina nebula

Type Planetary Nebula
Position 14 22.4, -44 09
Constellation Lupus
Camera and Telescope STL6303E and 36.8 cm Ritchey Chretien (visible shot).  The infrared used a STXL6303 camera.
Focal Ratio F9
Exposure Details For visible (left) LRGB 70:40:40:40 Luminance 1x1, Colours 2x2 with Astrodon series 2 filters (visible and near infrared).  For near infrared (right) LRGB 160:80:120:90.  Red is assigned to a band peaking at 850nm, green 830nm and blue 750nm.  The infrared luminance filter blocks all wavelengths shorter than 700nm.  Both images are full resolution.
Description This planetary nebula is relatively bright at magnitude 10.2 and quite easy visually.  It is about 1.7 x 0.6' in size and is sometimes known as the Retina nebula because of its resemblance to images of the retina in the human eye.  The central star which is visible in this image is magnitude 14.7.  Click here for the latest Hubble view (not LRGB)