Messier 106 (Canes Venatici)

Object image
Fig.1 - Calibration object in the Cosmic Distance Ladder: Messier 106 (NGC 4258) in Canes Venatici, photographed with a 16-inch f/4.5 Dob on an equatorial platform. The small galaxy above Messier 106 is NGC 4248.
Object name: Constellation: Coordinates: Apparent size: Visual brightness:
Messier 106 (NGC 4258) Canes Venatici 12h19m / +47°18' 18.6' x 7.2' 8.4 mag

The intermediate galaxy Messier 106 (NGC 4258) in the constellation Canes Venatici. Messier 106 is at a distance of 22 to 25 million light-years away from Earth. It contains an active nucleus classified as a Type 2 Seyfert (narrow emission lines). Messier 106 was discovered by Pierre Méchain in 1781 (source: Wikipedia).

Sixty-five 3-minute exposures (191 minutes total exposure) at ISO 800 taken on April 4 / 5, 2021 and on April 8, 2021 were added for this shot with the DeepSkyStacker software and the final image processing was done in Photoshop.

Equipment: Nikon D7500 Lifepixel h-alpha modified camera, TeleVue Paracorr Type II coma corrector, 16" f/4.5 "Ninja" dobsonian telescope riding on a dual-axis Tom Osypowski equatorial platform, Lacerta MGEN autoguider, Lacerta off axis system.

Search chart
Fig.2 - Search chart for Messier 106. Map © 2021 "The Mag-7 Star Atlas Project", Map is slightly modified. The map can be downloaded here.