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Contains:  NGC 6603
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            Gary Imm
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Technical card

Dates:July 1, 2017

Blue: 20x30" (gain: 139.00) -15C bin 1x1
Green: 20x30" (gain: 139.00) -15C bin 1x1
Red: 20x30" (gain: 139.00) -15C bin 1x1

Integration: 0.5 hours

Avg. Moon age: 7.83 days

Avg. Moon phase: 54.72% job: 1638691

RA center: 18h 18' 2"

DEC center: -18° 24' 0"

Pixel scale: 0.851 arcsec/pixel

Orientation: 93.657 degrees

Field radius: 0.614 degrees

Resolution: 4528x2547

Locations: Backyard (Mag 20.8 - New Moon), Onalaska, Texas, United States

Data source: Backyard


This object, which extends across the entire field of view of this image and beyond, is located approximately 100,000 light years from Earth. In the night sky, this star cloud appears about nine times larger than the full Moon. It is the densest concentration of individual stars in the night sky. It is an interesting object because, unlike other similar Messier objects, the star cloud is not a single star cluster. Instead, it is comprised of many thousands of stars seen through a unusually clear window in our galaxy's dust lanes. From a dark sky location, it is easily located with the unaided eye as a large hazy patch in the northern portion of the constellation of Sagittarius in the southern summer sky. It is a perfect object to see with binoculars, since it is so huge. The star cluster which stands out in the lower center of this image is NGC 6603, a faint open cluster of about 30 stars, located in the brightest region of the star cloud.



Gary Imm
License: None (All rights reserved)

Sky plot

Sky plot




            Gary Imm

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