Galaxies in Vir/Com

I imaged a wide region on the border of Virgo and Coma Berenices, full of galaxies, members of the Virgo Cluster.

This area of our sky is very far from the Milky Way’s galactic plane making it fairly blank, thus acts like a window to see beyond it.  This region features objects well known to amateurs, like many Messier galaxies and Markarian’s Chain (formed by, among others, M84 and M86).

The prominent objects are :

  • M 84, NGC 4374 [galaxy in Vir] 9.4m [wiki]
  • M 86, NGC 4406 [galaxy in Vir] 9m [wiki]
  • M 87, NGC 4486 [galaxy in Vir] Virgo A 8.8m [wiki]
  • M 88, NGC 4501 [galaxy in Com] 9.7m [wiki]
  • M 99, NGC 4254 [galaxy in Com]* 9.7m [wiki]
  • M 100, NGC 4321 [galaxy in Com] 9.7m [wiki]

To identify the objects, I used astrometry.net’s platesolving tool. Further on, I developed my own annotater which is based on astrometry’s plate solving and my DSO. So objects in the frame, but not necessarely visible:

***

Tech info: 19×2 min, ISO 1600, Canon 1100D mod, Canon EF 200mm f/2.8 L II USM at f/2.8, HEQ5, 2017-03-31, Dângău Mare, Cluj. Because of the maximum diaphragm, I had some ugly halos to deal with, but in exchange, no spikes.

raw sample

raw sample

stack

stack

flat needed

flat needed

flatted

flatted

crop, prominent objects

crop, prominent objects

crop, plate solved

crop, plate solved

annotated by my dso

annotated by my dso

Final image: Galaxies in Vir/Com

Final image: Galaxies in Vir/Com

*There are many pinwheels in astronomy. The Pinwheel is Messier 101, referred to as the Pinwheel Galaxy. Messier 83 is referred to as the Southern Pinwheel Galaxy. Sometimes M33 Triangulum Galaxy gets this name, and M99 might get mentioned as the Coma Pinwheel Galaxy.

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