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Markarian 421 - the "easiest" AGN

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About this observation
Observer
Nick Hewitt
Time of observation
07/03/2018 - 23:00
Object
Markarian 421 in Ursa Major
Observing location
Blilling, Northampton
Equipment
TMB 115mm APO refractor at f7
Starlight Xpress trius 814
EQ8
Autoguided with Lodestar2
Exposure
2 x 300sec Bin 2x2
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Perhaps the easiest Active Galactic nucleus (AGN) for smaller telescopes is this Blazar in Ursa Major's hind leg. Near a very accessible kite-shape or diamond asterism, easy enough in a finder telescope, is Markarian 421. It is some 400 million light-years distant and as detectable visually to the owner of smaller telescopes at magnitude ~ 12.8, so it can impress at star parties. How often are you asked "How far can you see with your telescope?". 400 million light-years should do the trick!

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