Emission nebula in constellation of Cepheus.
NGC 7822 is an emission nebula, a birthplace of many stars in the constellation Cepheus. The emission nebula itself is also called Sharpless 171, and the star cluster it contains is called Berkeley 59.
|Date of exposures:||14.10.2018, 15.10.2018, 18.10.2018|
|Exposures:||Ha 5nm: 54 x 600", OIII 3nm: 38 x 600", SII 3nm: 31 x 600", Sum: 20,5 hrs.|
|Telescope:||10'', F4 Newton|
|Filter:||Astrodon H-Alpha 5nm, OIII 3nm, SII 3nm|
|Camera:||ASI 1600 MMC Pro|
|Guiding:||Off Axis Guider, Lodestar|
It is estimated that this area is 800-1.000 pc (3,000 light years) away. The younger stars of the cluster are a few million years old, some are among the hottest in the Sun's surrounding, notably BD+66 1673, an eclipsing binary system consisting of a class O5V star with a surface temperature of 45,000 K and a ~100,000 luminosity of the Sun. This star is the primary source that makes the nebula shine, and it forms the Pillars of Creation, areas where the interstellar gas clusters and new stars are formed.
Since I exposed with my two telescopes at the same time, I took another picture with the Epsilon 130 in a larger field, which otherwise has the same exposure data.