AP#4 : NGC 253
Name: The "Silver Dollar" or "Sculptor" Galaxy
Constellation:Sculptor
Instrument: 8-inch F5 reflector with Sky watcher coma correctora and an ASI 2600 MC (gain 100 -20c).
Exposure time:16 Five-minute and 9 three-minute exposures.
Star Chart from Michael Vlasov's Deep sky hunter star atlas available on line https://www.deepskywatch.com/deep-sky-hunter-atlas.html
Magnitude: 8.0
Angular size: 28' X 7'
NGC 253 is a spiral galaxy in the constellation of Sculptor and is part of the Sculptor galaxy group. This galaxy is a large object that is often overlooked by northern hemisphere observers because of its low declination (-25 degrees). It is also probably why Charles Messier missed it from his list (Caroline Herschel discovered it in 1783). It is notable for the dust lanes and mottled appearance visible in this image.
