This page provides detailed finder charts for the objects mentioned in What’s Up in the November–December 2022 issue of Popular Astronomy. (Work in progress)
Finding the Andromeda Galaxy
The usual route to finding M31 is to start with Alpha Andromedae, which as mentioned is the top left star of the Square of Pegasus, then count two stars to the left, and two stars up (the stars in question being third and fourth magnitude). This brings you to Nu Andromedae, and M31 is just to the west of it. The photo below shows the route. The area within the square is enlarged in the inset showing a longer-exposure photo.
Identification of M32 and NGC 205 (M110)
Finding NGC 752
The finder chart below shows stars down to magnitude 9. The white circle indicates the typical 5° field of view of 10×50 binoculars or many finders. Place Gamma Andromedae at the top of the field of view and NGC 752 will be near the bottom of the field.
Finding the Blue Snowball, NGC 7662
This object is well away from the main stars of Andromeda and is probably best located by starting from the W of Cassiopeia. Bisect the right-hand arm of the W and find fourth-magnitude Lambda Andromedae. Then star-hop via Iota Andromedae or continue the line from Cassiopeia to fifth-magnitude 13 Andromedae. The Blue Snowball is within a standard eyepiece field of view of this star, although an increased magnification may be needed to identify it fully.
Finding NGC 891
This faint object is roughly midway between the bright star Gamma Andromedae and the star cluster M34, both seen in a finder. The map below shows both objects and stars down to magnitude 10. Two field of view have been superimposed to help you: a typical finder field of view of 5°, and a typical standard eyepiece field of view of 1°. The quadrilateral of stars within the 1° field is roughly between fourth-magnitude 60 Andromedae and a sixth-magnitude star.
