Plan this observation
Winnecke 4: a pair of stars.
Locating guide from the book1,4° NE of δ UMa
N, S, E and W indicate cardinal directions; combinations give a more precise direction. Greek letters identify the constellation’s guide stars. Check the route on a suitable chart.
M40 is an optical double: the two stars should not be interpreted as a cluster or nebula.
Photographs help you recognise structures, but do not predict the view through an eyepiece. Detection depends on the sky, the object’s altitude and your instrument.
_(noao-m40).jpg){kind=link}