" :The star atlas: ::*Will Tirion, ""Sky Atlas 2000.00"", Sky Publishing Corp., 1981, ISBN 0-933346-33-6. :has the great orion nebula between about: 5h 33m to 5h 37m; -5° 0' to -6° 5'. That's roughly 65'(RA) by 60'(Dec). If you include the northern cloud (1977), the Dec. goes from -4° 35' to -6° 5'. That would give roughly 60'(RA) by 85'(Dec.). For just NGC1976 (M42) I get 5h33.5m to 5h36.3m; -5°12' to -5°50', for roughly 42' by 38' (round to 45' by 40'). :On the other hand: ::*Roger W. Sinnott and Michael A.C. Perryman, 1997 ""Millenium Star Atlas"", Vol. 1, chart 278, ISBN 0-933346-82-4. :has the
" :The star atlas: ::*Will Tirion, ""Sky Atlas 2000.00"", Sky Publishing Corp., 1981, ISBN 0-933346-33-6. :has the great orion nebula between about: 5h 33m to 5h 37m; -5° 0' to -6° 5'. That's roughly 65'(RA) by 60'(Dec). If you include the northern cloud (1977), the Dec. goes from -4° 35' to -6° 5'. That would give roughly 60'(RA) by 85'(Dec.). For just NGC1976 (M42) I get 5h33.5m to 5h36.3m; -5°12' to -5°50', for roughly 42' by 38' (round to 45' by 40'). :On the other hand: ::*Roger W. Sinnott and Michael A.C. Perryman, 1997 ""Millenium Star Atlas"", Vol. 1, chart 278, ISBN 0-933346-82-4. :has the great