Finding Z UMa using the AAVSO Variable Star Atlas

Figure 7.1 - Finding Z UMa using the AAVSO Variable Star Atlas. First, use a planisphere or sky chart for the appropriate month to verify that the constellation of Ursa Major is visible during the date and time you wish to observe. If it is, then note the configuration of the brightest stars. Next, go to the Index page of the AAVSO Variable Star Atlas and locate the same star configuration. You will probably have to rotate the planisphere to come up with the same orientation. Note that in this example the Index refers you to Chart 22.

Figure 7.2 - Chart 22 from the AAVSO Variable Star Atlas with constellation lines drawn in and Z UMa circled. Note that the orientation is different from that of the Index page (shown in Fig 7.1 above). A miniature version of the AAVSO "a"-scale chart is also shown for scale comparison.

Click on the image to enlarge Chart 22.