Here is an image showing the brightening of Gyulbudaghian's variable nebula, located at RA 20h 45' 55" and Declination +67º 57' 45" in Cepheus. There is clearly more of the cometary looking nebulosity north of the star PV Cephei. The image is a stack of 57 30-second exposures at ISO 1600 and f/3 on the 20" scope, taken on 8th March 2010. But the processing used non-linear stretches and an artificially created and edited flat field to give the most pleasing picture, so in no way is it quantitatively calibrated. It looks wonderful in such a large format and it's nice to have sort of discovered something changing up there in the stillness of space!
Saturday 20 March 2010
Gyulbudaghian's brightening
Here is an image showing the brightening of Gyulbudaghian's variable nebula, located at RA 20h 45' 55" and Declination +67º 57' 45" in Cepheus. There is clearly more of the cometary looking nebulosity north of the star PV Cephei. The image is a stack of 57 30-second exposures at ISO 1600 and f/3 on the 20" scope, taken on 8th March 2010. But the processing used non-linear stretches and an artificially created and edited flat field to give the most pleasing picture, so in no way is it quantitatively calibrated. It looks wonderful in such a large format and it's nice to have sort of discovered something changing up there in the stillness of space!
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