Wide field Orion
Open cluster NGC 1981 at the top then down to the Running Man reflection/emission nebula then finally M42 and M43 below.
Its actually been 4 years since I last tackled this subject with my 480mm f/6 scope.
The 2019 plan was to acquire about an hour of 1 minute subs at ISO800 but when I checked through, there was occasional light cloud and haze so this is 43 x 1 minute subs.
Previous effort in March 2015 here:
www.flickr.com/photos/16271433@N02/16373842900/in/album-7...
480/80mm f/6 Altair Starwave triplet refractor.
Altair Planostar 1.0 x FF with 2 inch IDAS LPS D1 filter
Astro-modified Canon 80D at ISO800; 43 x 1 minute subs (43 mins total integration).
NEQ6 pro mount with Rowan belt drives -2 star align.
Mini-PC NUC with WiFi extender
Mount WiFi control with ASCOM/AstroPhotography Tool
Camera WiFi control with Backyard EOS
Camera sensor temperature (external battery): 16-18c
33 dark frames from dark library (temperature selected; 16-18c)
90 flat frames (electroluminescent panel @ 1/80s)
90 bias frames
Post processed in PixInsight 1.8.6 and Photoshop CC 2019.
Local parameters:
Temp: 10.1 - 10.6c
Humidity: 64- 66%
Pressure: 1023 hPa
Light Pollution and Weather:
SQM (L) at start of session (2010 hrs UT) =19.61 mag/arcsec2.
SQM (L) at end of session (2130 hrs UT) =19.84 mag/arcsec2.
Occasional light cloud or mist causing star blooming - 12 subs discarded.
Polar Alignment:
QHY Polemaster alignment -
Error measured by PHD2= 1.3 arc minute.
RA drift + 1.96 arcsec/min
Dec drift -0.34 arcsec/min
Guiding:
PHD2 guiding with ZWO ASI290mm/Altair Starwave 206/50mm guider. Partially Dithered.
RA RMS error 1.25 arcsec, peak error 4.66 arcsec
Dec RMS error 0.82 arcsec, peak error 3.17 arcsec
Astrometry:
Center (RA): 05h 35m 24.463s
Center (Dec): -05° 16' 17.071"
Size: 1.43 x 2.08 deg
Image scale: 1.59 arcsec/pixel
Orientation: Up is 3.14 degrees E of N
Wide field Orion
Open cluster NGC 1981 at the top then down to the Running Man reflection/emission nebula then finally M42 and M43 below.
Its actually been 4 years since I last tackled this subject with my 480mm f/6 scope.
The 2019 plan was to acquire about an hour of 1 minute subs at ISO800 but when I checked through, there was occasional light cloud and haze so this is 43 x 1 minute subs.
Previous effort in March 2015 here:
www.flickr.com/photos/16271433@N02/16373842900/in/album-7...
480/80mm f/6 Altair Starwave triplet refractor.
Altair Planostar 1.0 x FF with 2 inch IDAS LPS D1 filter
Astro-modified Canon 80D at ISO800; 43 x 1 minute subs (43 mins total integration).
NEQ6 pro mount with Rowan belt drives -2 star align.
Mini-PC NUC with WiFi extender
Mount WiFi control with ASCOM/AstroPhotography Tool
Camera WiFi control with Backyard EOS
Camera sensor temperature (external battery): 16-18c
33 dark frames from dark library (temperature selected; 16-18c)
90 flat frames (electroluminescent panel @ 1/80s)
90 bias frames
Post processed in PixInsight 1.8.6 and Photoshop CC 2019.
Local parameters:
Temp: 10.1 - 10.6c
Humidity: 64- 66%
Pressure: 1023 hPa
Light Pollution and Weather:
SQM (L) at start of session (2010 hrs UT) =19.61 mag/arcsec2.
SQM (L) at end of session (2130 hrs UT) =19.84 mag/arcsec2.
Occasional light cloud or mist causing star blooming - 12 subs discarded.
Polar Alignment:
QHY Polemaster alignment -
Error measured by PHD2= 1.3 arc minute.
RA drift + 1.96 arcsec/min
Dec drift -0.34 arcsec/min
Guiding:
PHD2 guiding with ZWO ASI290mm/Altair Starwave 206/50mm guider. Partially Dithered.
RA RMS error 1.25 arcsec, peak error 4.66 arcsec
Dec RMS error 0.82 arcsec, peak error 3.17 arcsec
Astrometry:
Center (RA): 05h 35m 24.463s
Center (Dec): -05° 16' 17.071"
Size: 1.43 x 2.08 deg
Image scale: 1.59 arcsec/pixel
Orientation: Up is 3.14 degrees E of N