Tag Archives: globular

Globular Cluster NGC 2419 in Draco

Here is a view of the most distant globular cluster in the Milky Way, NGC 2419, some have postulated that this may be an extra-galactic object. I have seen distances as high as 285,000 light-years distant. It appears small and dim, but it is actually very large and very bright (if it was a bit closer to us), there are estimates of 300-400 million solar masses in this cluster.

Tech Specs: This image is composed of 44 x 30 second images at ISO 3,200 with 5 x 30 second darks and 5 x 1/4000 second bias frames (captured using BackyardEOS software) using a Meade LX90 12” telescope and Canon 6D camera mounted on a Celestron CGEM-DX mount. Imaging was done on February 19, 2017 from Weatherly, Pennsylvania.

…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 75 – Globular Cluster in the Constellation Sagittarius

Messier 75 (M75 or NGC 6864) is a compact (class I) globular cluster found in the constellation Sagittarius. It is about 67,500 light years away and has an apparent visual magnitude of 8.5.

m75_8min_090116-1

Tech Specs: This image is composed of 32 x 15 second images (8-minutes total) at ISO 3200 with 5 x 15 second dark frames and 5 x 1/4000 second bias frames. Equipment: Meade LX90 12” telescope and Canon 6D camera mounted on a Celestron CGEM-DX mount, unguided. Software: DeepSkyStacker, ImagesPlus, and Adobe Lightroom. Imaging was done on September 1, 2016. Location: Weatherly, Pennsylvania.

Online resources:

Wikipedia (https://en.wikipedia.org/wiki/Messier_75)

SEDS (http://messier.seds.org/m/m075.html)

AstroPixels (http://astropixels.com/globularclusters/M75-01.html)

Carpe noctem!

…Tom

Messier 72 – Globular Cluster in the Constellation Aquarius

Globular Cluster Messier 72 (M72 or NGC 6981) is a globular cluster that can be found in the constellation Aquarius. It has been estimated that this globular cluster has a combined mass equal to 168,000 times the mass of the sun!

m72_8min_090116_1-1

Tech Specs: This image is composed of 32 x 15 second images at ISO 3200 with additional dark and bias frames. Meade LX90 12” telescope, Antares Focal Reducer, and Canon 6D camera. Imaging was done on September 1, 2016.

Online resources:

Wikipedia (https://en.wikipedia.org/wiki/Messier_72)

SEDS (http://messier.seds.org/m/m072.html)

Carpe noctem!

…Tom

NGC 6717 (Palomar 9) – Globular Cluster in Sagittarius

NGC 6717 is a globular cluster in the constellation Sagittarius hidden right next to the supergiant star Nu2 Sagittarii. It has a magnitude of 9.3 and represents a good challenge for your telescope. This cluster also bears the name Palomar 9, most of the Palomar globular clusters were discovered in the 1950’s using photographic plates from the first Palomar Observatory Sky Survey (POSS).

ngc6717_5min_092716

Tech Specs: This image is composed of 20 x 15 second images at ISO 3200 with additional dark and bias frames using a Meade LX90 12” telescope, Antares Focal Reducer, and Canon 6D camera. Imaging was done on September 27, 2016.

Clear skies!

…Tom

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