Jul 282019
 

We had a great clear spell 7/23 through 7/27 with only moderate lunar interference in the early hours of the morning. This is 14 hours of exposure divided equally across Hydrogen-alpha, Oxygen [III], and Sulfur[II] emission lines. Scope was an AP130GTX with Apogee U16 CCD on an AP1200GTO mount. Located outside Clinton, TN. The following are crops from the main image.

Finally, here is the nearly full frame image encompassing the whole area.

May 072019
 

Due to a moisture breach of my camera causing frosting issues which caused me to throw out all but 4.5 hours of data out of 18 I figured I might as well post this as it’s not going to get much better. Image scale was 1.31 arcsec/pixel which seems to give fairly decent sampling for the average seeing here in East Tennessee. Imaging location just outside Clinton, TN with average SQM measurements ranging from 20.1 to 20.4 mag/arcsec^2.

M106 – 4.5 hours AP130GTX, Apogee U8300, AP1200GTO

Jan 282018
 

I recently replaced the dome control electronics after the Foster Systems controller bit the dust and I replaced with a MaxDome II controller for rotation and shutter operation.  It’s working flawlessly so far and I couldn’t be happier.  I threw the 5″ refractor back in the observatory with the 16803 chipped camera for a widefield rig at 2.2 arcsec/pixel resolution.  Drizzle processing yields better star shapes/sampling than the low resolution would suggest.  Both images are cropped from the same image with 20.5 hours of total exposure time in the traditional Hubble Pallet.

 

Jul 302017
 

I was the first one to arrive for the star party on Saturday night at Look Rock South.  It’s a beautiful view to the south looking into the Smokies.

 

We definitely had some clouds for the beginning of the night with some sucker holes now and then.  I was never able to get off a 20 minute shot without the clouds rushing in within 10 minutes…

But things finally started to clear up and the Milky Way really started to pop out.

Emission Nebula NGC 6820 or Sharpless SH 2-86. AP130GTX with Field Flattener Custom 4″ OAG Apogee U16 CCD w/Baader Ha 7nm filter AP900GTO Mount 9x20min Exposures Image Scale 2.16 arcsec/pixel; reduced to 4.32 arcsec/pixel

Once it was cleared up I was off to take some test shots and validate the portable rig was ready for more serious projects.  NGC 6820 AKA Sharpless SH 2-86 and all the surrounding emission and dark nebula has always been a favorite of mine.  It’s located in Vulpecula not that far from M27, the Dumbbell Nebula.  It reminds me of a less popular M16 with it’s gas and dust pillars and dark globules.  Open cluster NGC 6823 resides in the midst of the nebula and is about 6,000 light years away.

 

Mar 262017
 

We’re in Galaxy Season and without the 10″ RC I’ve instead focused on the 5″ refractor with a small pixel size camera to squeeze out some detail.  Imaged from the backyard observatory in ~20.5 mag/arcsec^2 skies.

M81 – Bodes Nebula ~8 hours of exposure time. LRGB with AP130GTX, AP1200GTO, Apogee Ascent A694, Baader LRGB Filters, SX-OAG, Lodestar Guider.

 

M82 – The Cigar Approximately 7.5 Hours of exposure time. AP130GTX, AP1200GTO, Apogee Ascent A694, Baader LRGB, SX-OAG, Lodestar Audoguider