Sharpless 205, Metsavainio
Sharpless 205, Metsavainio

Equipment

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Acquisition details

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Description

This Sharpless object is very dim and difficult to shoot (as they usually are). The bright, peanut shape, area at middle is known as Sh2-205, bright nebula, at top left, is NGC 1491. Image spans about 5,5 degrees horizontally, that's 11 full Moons side by side. There are very few images around out of this object. Total exposure time, with a fast 200mm f1.8 optics, is 12h from three nights between 28.01 - 02.02. 2012.

Technical details:

Processing work flow:

Image acquisition, MaxiDL v5.07.

Stacked and calibrated in CCDStack2.

Levels, curves, color and mosaic combine in PS CS3.

Optics, Canon EF 200mm camera lens at f1.8

Camera, QHY9

Guiding, Meade LX200 GPS 12" and a Lodestar guider

Image Scale, ~5,5 arcseconds/pixel

Exposures, Baader 7nm H-a, 12x1800s + 15x1200s = 11h

O-III, binned down 3x3 1h. total exposure time12 hours.

Calibration with Darks, Flats and Bias frames.

Comments

Histogram

Sharpless 205, Metsavainio