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Contains:  M 52, NGC 7654, Bubble nebula, NGC 7635, NGC 7538, NGC 7510, IC 1470
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NGC 7635, 


NGC 7635

NGC 7635

Technical card

Resolution: 1223x1835

Dates:May 23, 2017

Frames: 8x300"

Integration: 0.7 hours

Avg. Moon age: 26.83 days

Avg. Moon phase: 8.01% job: 1651679

RA center: 349.465 degrees

DEC center: 60.811 degrees

Pixel scale: 7.672 arcsec/pixel

Orientation: -82.771 degrees

Field radius: 2.350 degrees


NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region[1] emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7[1] magnitude young central star, SAO 20575 (BD+60°2522).[7] The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow.[7] It was discovered in 1787 by William Herschel.[5] The star BD+60°2522 is thought to have a mass of about 44 M

Messier 52 (also known as M52 or NGC 7654) is an open cluster in the Cassiopeia constellation. It was discovered by Charles Messier in 1774. M52 can be seen from Earth with binoculars.

Due to interstellar absorption of light, the distance to M52 is uncertain, with estimates ranging between 3,000 and 7,000 light years. One study identified 193 probable members of the cluster, with the brightest member being magnitude 11.[1]

Messier 52 is evaluated at about 35 million years old.

Messier 52 has the Trumpler classification of I,2,r.




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  • Final
    NGC 7635, 


  • NGC 7635, 




Cropped version.

Sky plot

Sky plot


NGC 7635,