|
Object |
M 51 |
|
Coordinates |
RA:
13 29 55.4 Dec: +47 10 05 Camera PA: 292.4 |
|
Imaging
by |
Greg
Morgan |
|
Date(s) |
May 22 to
25, 2009 |
|
Optics |
RCOS
12.5 inch f/9 Ritchey-Chrétien with a
2,857mm focal length |
|
Mount |
Paramount
ME |
|
Camera |
Apogee
Alta U16M, 9 micron 4098 x 4098 pixels |
|
Guiding |
Off-axis
with the Astrodon Monster MOAG and SBIG ST-402XM |
|
Field Scale |
0.64 arcseconds / pixel |
|
FOV |
39 x 24
arc minutes, N is to the left, E is down. |
|
Chip Temp |
-15 C |
|
Filter(s) |
Astrodon LRGB
Gen 2 |
|
Location |
Sierra
Remote Observatories, Shaver Lake California 4,610 feet |
|
Exposure(s) |
L = 12, R
= 12, G = 11, B = 9
x 1800 seconds (22 Hours
Total) |
|
Binning |
1x1 |
|
Camera control |
MaxIm DL 4 /
CCDAutopilot 3 |
|
Processing
software |
CCDStack, Photoshop CS2 |
|
Image notes |
One night
was dedicated to each channel. LRBG data were
collected on May 23 to 25 respectively.
CCDAutopilot
was used to collect data over multiple nights.
On
Saturday night the 23rd, the seeing was excellent averaging
0.74 arc seconds for the entire night! This was the
night I collected my red data. This is quite
exceptional for a site at only 4610 feet. Please look
at the SBIG seeing data below.
The FWHM
measured ~1.9 arc seconds for each of the stacked master
frames for each channel.
I have also
included a full frame image below showing the full 43 arc
second square FOV around M 51. |
