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February, 2013:

Coma Galaxy Cluster

I’ve always wanted to go after this one and while the site I use really isn’t dark enough for this sort of work I decided to have a go at it anyways.

I also noticed that my T3 has the dark line under bright stars problem! I always use 1600 ISO but for this image I decided to experiment with 800 ISO. So back to 1600 ISO from now on.

Image Location and Date: Orange County Astronomers dark site in Anza, CA, Feb 16th
Object: Coma Cluster
Mount: Orion Atlas EQ-G
Imaging scope: Orion 8″ f3.9 Astrograph
Imaging FL: 800mm
Imaging focal ratio: f3.9
Imaging camera: Canon 1100D (Rebel T3) Modded
Lights: 40x600sec @ ISO 800

Calibration: Darks, flats, Bias
Guide scope: Tair-3c with Orion StarShoot Auto Guider
Other details: guiding with PHD, captured with APT, processed in PixInsight + PS

You really have to see the full scale image to see all the tiny galaxies in the background. Pretty cool.

Here is an annotated version pointing out Quasar HB89(1256+280). This is an object over 10 BILLION light years away.

Rosette Nebula HaRGB

Had a go at the Rosette over the last two weekends. I knew it would fill up my frame (and then some) but thats okay, I wanted all the pretty inner details. I captured the RGB last weekend, only got a couple hours because of snow/fog/clouds. Went out last night during the first quarter moon and got some hydrogen alpha courtesy of my 12nm clip in filter. Much better now!

Image Location and Date: Orange County Astronomers dark site in Anza, CA, Dec 15th, Feb 9th and 16th
Object: Rosette Nebula
Mount: Orion Atlas EQ-G
Imaging scope: Orion 8″ f3.9 Astrograph
Imaging FL: 800mm
Imaging focal ratio: f3.9
Imaging camera: Canon 1100D (Rebel T3) Modded
Lights: 23x600sec @ ISO 1600 HA
19x300sec @ ISO 1600 w/CLS filter (RGB)

Calibration: Darks, flats, Bias
Guide scope: Tair-3c with Orion StarShoot Auto Guider
Other details: guiding with PHD, captured with APT, processed in PixInsight + PS