H-II Regions Sh 2-147/148/149/152/153
History
In the 1950-ies the American astronomer Stewart Sharpless did a survey for H II regions on the photo plates of «Palomar Observatory Sky Survey» made with the 48-inch Schmidt telescope. In his first publication the nebulae were listed as number 100, 101, 102, 104 and 105. [309] In 1959 he published a revised and extended version of his survey and listed the western nebulae as Sh 2-147, Sh 2-148, Sh 2-149 and the eastern nebulae as Sh 2-152 and Sh 2-153. [310]
In Beverly Lynds «Catalogue of Bright Nebulae», which was published in 1965. Three of Sharpless nebulae were there listed as LBN 108.33-01.05, LBN 108.80-00.98 and LBN 108.78-01.01. [270]
Physical Properties
| Designations | RA (J2000.0) | Dec (J2000.0) |
|---|---|---|
| Sh 2-147 | 22 55 42 | +58 28 00 |
| Sh 2-148 | 22 56 18 | +58 31 00 |
| Sh 2-149, LBN 108.33-01.05, LBN 516 | 22 56 18 | +58 31 00 |
| Sh 2-152, LBN 108.80-00.98, LBN 519 | 22 58 41 | +58 46 59 |
| Sh 2-153, LBN 108.78-01.01, LBN 518 | 22 58 37 | +58 46 48 |
Finder Chart
The H-II regions Sh 2-147 through Sh 2-153 are located in the constellation Cassiopeia near Cepheus. Roughly 2° towards West there is the Wizard Nebula NGC 7380. These nebulae are circumpolar for Central Europe. The best time to observe is July to January, when the constellation is highest at night.
