Tag Archives: October

NGC 6905 – The Blue Flash Nebula in Delphinus

Here is a 15-minute combined exposure of the Blue Flash Nebula of the constellation Delphinus (also known as NGC 6905). The inset has the brighter surrounding stars removed and adjusted to bring out some details. Focus slipped out on this somewhat – back on the target list for next season.

Tech Specs: This image is composed of 60 x 15 second images at ISO 3,200 with 5 x 15 second darks and 5 x 1/4000 second bias frames using a Meade LX90 12” telescope and Canon 6D camera mounted on a Celestron CGEM-DX mount. Imaging was done on October 5, 2016 from Weatherly, Pennsylvania.

Wikipedia (https://en.wikipedia.org/wiki/NGC_6905)

Miami Valley Astronomical Society (http://mvas.org/node/5224)

Kitt Peak (https://www.noao.edu/kpvc/observers/n6905.html)

Clear skies!

…Tom

Eta Cassiopeia – A Beautiful Binary Star System

Here is a picture of the beautiful binary star system Eta Cassiopeia, sporting the colors gold and orange. The stars have a rotation period of about 500 years, the star magnitudes are 3.47 and 7.22. The orbit is not circular as the separation varies from 5” up to about 16”.

eta_cas_20161019

Tech Specs: This is a single image exposure, five seconds, ISO 3200, using a Meade LX90 12” telescope and Canon 6D camera mounted on a Celestron CGEM-DX mount. Imaging was done on October 19, 2016 from Weatherly, Pennsylvania.

Online resources:

Wikipedia (https://en.wikipedia.org/wiki/Eta_Cassiopeiae)

Star Observer (http://www.starobserver.eu/multiplestars/etacassiopeiae.html)

Carpe noctem!

…Tom

NGC 6879 – A Compact Planetary Nebula in Sagitta

I wasn’t sure what to expect from imaging this planetary nebula, most images I found only showed a small blue dot. It looks like I ended up with the same type of image. This planetary nebula is found in the constellation Sagitta and is magnitude 12.5, and very small. Cropping, zooming and manipulating the planetary nebula region revealed no details.

ngc6879_15min_100516

Tech Specs: This image is composed of 60 x 15 second images at ISO 3,200 with 5 x 15 second darks and 5 x 1/4000 second bias frames using a Meade LX90 12” telescope and Canon 6D camera mounted on a Celestron CGEM-DX mount. Imaging was done on October 5, 2016 from Weatherly, Pennsylvania.

DSO-Browser.com (https://dso-browser.com/deep-sky/8062/ngc-6879/planetary-nebula)

Simbad (http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%206879)

DeepSkyPedia (http://www.deepskypedia.com/wiki/NGC_6879)

Carpe noctem!

…Tom

NGC 6229 – A Distant Globular Cluster in Hercules

Here is a very distant globular cluster called NGC 6229 found in the constellation Hercules, it is about 100,000 light years distant. It has a visual magnitude of 9.39. What a difference distant makes when you compare this globular cluster with the spectacular Hercules cluster (25,000 light years away) which is found in the same constellation.

ngc6229_8min_100516_1-1

Tech Specs: This image is composed of 32 x 15 second images at ISO 3200 with 5 x 15 second darks and 5 x 1/4000 second bias frames using a Meade LX90 12” telescope and Canon 6D camera mounted on a Celestron CGEM-DX mount. Imaging was done on October 5, 2016 from Weatherly, Pennsylvania.

Online resources:

Wikipedia (https://en.wikipedia.org/wiki/NGC_6229)

DeepSkyPedia (http://deepskypedia.com/wiki/NGC_6229)

Astronomy.com (http://www.astronomy.com/observing/observing-podcasts/2014/06/ngc-6383-ngc-6229-and-the-cheerio-nebula)

Carpe noctem!

…Tom

Messier 57 – An Updated View of the Ring Nebula of Lyra

M57 (NGC 6720) is probably one of the most recognizable Messier objects. It is a planetary nebula found in the constellation Lyra, referred to as the Ring Nebula, and lies about 2,300 light-years from Earth.

Typically I’ve been doing DSO’s using an Antares Focal Reducer, it helps give me a wider field of view and a lower f-stop. Several friends commented on my last image that I may get more details in the nebula by removing the focal reducer from the image train. I’m happy with the results – I’ve been imaging other planetary nebula without the focal reducer and getting much better details.

This image is composed of 60 x 15 second images at ISO 3200 with additional dark and bias frames. Tech Info: Meade LX90 12” telescope and Canon 6D camera. Imaging was done on October 10, 2016.

m57_15min_101016test1-1

The zoomed in image was converted to grayscale and adjusted to try and bring out additional details and to check the lower magnitudes I captured. Some will be hard to see in this image, but they are there.

m57_15min_101016bwfilter

I used magnitudes from the following sources:

http://www.cloudynights.com/ubbthreads/attachments/4289596-M57MagSequence1.jpg

https://www.eso.org/public/outreach/eduoff/cas/cas2002/cas-projects/germany_m57_1/

http://www.cloudynights.com/topic/538527-photometry-of-m57-stars-in-and-around-the-nebula/

Carpe noctem!

…Tom

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