Simeis
Size Comparison between Simeis 147 and Full Moon
Characteristics:
FOV: approximately 3.9 x
3.9 degrees (two panel mosaic)
RA (J2000): 05h 43m 12s
Dec (J2000): +28 degrees 17' 00"
Position Angle: +0 degrees
Description:
Please see previous
page for description of Simeis 147. In the above image,
I superimposed one of my old images of the full moon for a size
comparison (i.e., this is a digital composite, not an actual shot of
the full moon next to Simeis 147). The full moon measures 0.5
degrees (30 arcminutes) in angular diameter, whereas the full extent of
Simeis 147 is larger than 3 degrees!
Photographic
Details:
Date: Ha- October 22, 2007 (bottom half); December 13, 2008 (top
half). The years are correct- I did not get a chance to acquire
the top half of this image until now!
Scope: Takahashi
FSQ106 at f5 on the Takahashi NJP
Mount
Autoguider: SBIG ST-402 with
60mm guidescope, focal length 227mm
Camera: STL11K -20C
Filters: Baader 7nm
Ha filter, 50.8mm
unmounted
Exposures: Ha for
each half was 210'; Total
exposure 7 hours
Post-processing:
Calibrated, aligned, and Sigma Clip combined
in Maxim, followed
by DDP
in ImagesPlus (IP). Further processing in Photoshop CS (16
bit format)
Please
note: Graphics on this website may not be reproduced without
author permission.
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