Plan this observation
NGC 5866 by convention; its historical identification is debated.
Locating guide from the book4,1° SW of ι Dra
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.
M102 is presented here as NGC 5866, following the convention used in the book. Its historical identification is debated; the HEASARC table contains only 109 entries.
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.
