SH2 140,LDN 1201,HH 251,252,253,254 (Cepheus)

SH2-140,LDN 1201,HH 251,252,253,254 (Cepheus) * July 2016 * ASA N12 astrograph (f/3,6,1078mm) * DDM 85 ASA * FLI ML300 * Optec LRGB filter set * L: 360m R: 120m G:90m B: 120m * Unguided *The nebula is located in the south central part of the constellation, about 5 degrees north of the star ζ Cephei; It is located on the edge of a vast dark complex and can be incorporated in long-exposure photographs of amateur telescopes. Inside you will find a group of young stars of the ninth and tenth magnitude, dominated by HD 211880, a blue-white star of the main sequence of spectral class B0.5V with a 7.74 magnitude. The central region is completely invisible in optical images, but the images at near-infrared and radio waves suggests the presence of a cluster of stars very focused. The nebula is located in a strongly northern declination, so it is well visible only from the regions located north of the equator; from the southern hemisphere its visibility is limited to tropical regions. Sh2-140 is a H II region located on the southwestern edge of the dark nebula LDN 1204 in Cepheus Bubble, a distance of about 900 parsecs (2900 light years) from the Sun. The observations of all the infrared band are You were conducted mainly in order to identify any young stars in the region; as a result of these studies it was completed the first comprehensive catalog of all the young stellar objects Sh2-140, of three infrared sources IRS 1 and IRS 2 IRS 3,to which were added two more discoveries sources later. Source: Wikipedia,CDS