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M 52-2- NGC 7635 - T 68
Wide field on M 52 ( salt and pepper cluster ) and NGC 7635 ( Bubble Nebula ) are only 3 shots of 6 minutes each, for 18 minutes of integration with Celestron Rasa 11 279/620 f 2/2 telescope, ZWO ASI2600 Color camera, processing with Pixinsight and Photoshop. M52 is located in an area of the sky rich in objects, thanks to the presence of the trail of the Milky Way, at the western end of the constellation Cassiopeia and on the border with that of Cepheus; it is identified by continuing the alignment between the stars α Cassiopeiae and β Cassiopeiae for the same distance from the two stars. It can also be observed with binoculars such as an 8x30 or a 10x50, although only a few of its member stars are identifiable, dominated by a yellowish star of magnitude 8.26, much brighter than the others, located on the western side; A telescope with a 150mm aperture shows up to fifty very small and close components, while in a 250mm they become over 150.
Its declination is very northern: in fact, this cluster is circumpolar from most of the northern hemisphere, like all of Europe and North America, beyond the Tropic of Cancer; from the southern hemisphere, on the other hand, it is possible to observe it only near the equator. The best time for observing it in the evening sky is between August and January; from the northern regions it is one of the best known and most observed galactic objects in the autumn sky. NGC 7635 (sometimes known as the Bubble Nebula or C 11) is a diffuse nebula in the constellation Cassiopeia, towards the border with Cepheus. It can be identified very close to the open cluster M52, to the point that at low magnification it appears in the same field of view; Its main feature is a void "bubble" surrounded by a nebula, visible with powerful instruments in the southern part of the object, caused by the stellar wind of the young central star, of magnitude 8.7. In an amateur telescope, however, the nebula is well revealed, which seems to end in the south with an arc shape.
M 52-2- NGC 7635 - T 68
Wide field on M 52 ( salt and pepper cluster ) and NGC 7635 ( Bubble Nebula ) are only 3 shots of 6 minutes each, for 18 minutes of integration with Celestron Rasa 11 279/620 f 2/2 telescope, ZWO ASI2600 Color camera, processing with Pixinsight and Photoshop. M52 is located in an area of the sky rich in objects, thanks to the presence of the trail of the Milky Way, at the western end of the constellation Cassiopeia and on the border with that of Cepheus; it is identified by continuing the alignment between the stars α Cassiopeiae and β Cassiopeiae for the same distance from the two stars. It can also be observed with binoculars such as an 8x30 or a 10x50, although only a few of its member stars are identifiable, dominated by a yellowish star of magnitude 8.26, much brighter than the others, located on the western side; A telescope with a 150mm aperture shows up to fifty very small and close components, while in a 250mm they become over 150.
Its declination is very northern: in fact, this cluster is circumpolar from most of the northern hemisphere, like all of Europe and North America, beyond the Tropic of Cancer; from the southern hemisphere, on the other hand, it is possible to observe it only near the equator. The best time for observing it in the evening sky is between August and January; from the northern regions it is one of the best known and most observed galactic objects in the autumn sky. NGC 7635 (sometimes known as the Bubble Nebula or C 11) is a diffuse nebula in the constellation Cassiopeia, towards the border with Cepheus. It can be identified very close to the open cluster M52, to the point that at low magnification it appears in the same field of view; Its main feature is a void "bubble" surrounded by a nebula, visible with powerful instruments in the southern part of the object, caused by the stellar wind of the young central star, of magnitude 8.7. In an amateur telescope, however, the nebula is well revealed, which seems to end in the south with an arc shape.