About this Object:
Messier 46 (also known as M 46 or NGC 2437) is an open cluster in the constellation of Puppis. M46 is about 5,500 light-years away with an estimated age on the order of several 100 million years. The planetary nebula NGC 2438 appears to lie within the cluster near its northern edge (the faint smudge at the top center of the image), but it is most likely unrelated since it does not share the cluster's radial velocity. The case is yet another example of a superposed pair, joining the famed case of NGC 2818.

About this Photo:
Date(s): February 25, 2011
Location: From my driveway in Georgetown, Texas
Telescope: Celestron C9.25 @ F10
Mount: HEQ-5
Guiding: Orion StarShoot AutoGuider / Taurus Tracker III OAG
Camera: Canon 40D Modified
Filter: Astronomik CLS
Exposure: 4 x 60s @ ISO1600 (4 Min total)
Acquisition: ImagesPlus 3.75 Camera Control
Processing: ImagesPlus 3.75 – Darks,Flats,Bias
Post-processing: Adobe Photoshop CS3; Gradient Exterminator; Noise Ninja; Noel Carboni's Tools; Star Spikes Pro
Temperature(s): 50º F