Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  IC 3432  ·  IC 3442  ·  IC 3453  ·  IC 3476  ·  IC 3478  ·  IC 3500  ·  M 88  ·  M 91  ·  NGC 4468  ·  NGC 4474  ·  NGC 4501  ·  NGC 4516  ·  NGC 4523  ·  NGC 4548  ·  NGC 4571
Getting plate-solving status, please wait...
M88 and M91, 


            Kurt Zeppetello
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Getting plate-solving status, please wait...
M88 and M91, 


            Kurt Zeppetello
Powered byPixInsight
Imaging Cameras
Canon T3i Full Spectrum 600D
Orion Sirius EQ-G (HEQ5)
Astrodon UV/IR
Orion .8X Focal Reducer
Adobe photoshop · Lightroom · StarTools · Gradient Exterminator · Astronomy Tools - PS · BackyardEOS · PHD Guiding
Guiding Telescopes Or Lenses
Agena 50mm Guide Scope with Helical Focuser
Guiding Cameras
QHY-5-L-II-M Planatary & Autoguider

Acquisition details

May 18, 2017
60x90" (1h 30') ISO1600
1h 30'
Avg. Moon age:
21.65 days
Avg. Moon phase:
Bortle Dark-Sky Scale:

RA center: 12h32m20s.34

DEC center: +14°2422.9

Pixel scale: 1.834 arcsec/pixel

Orientation: 0.038 degrees

Field radius: 1.512 degrees

More info:Open 

Resolution: 2782x1976

Locations: Happy Frog Observatory, Monroe, Connecticut, United States

Data source: Backyard


Along with M85, imaged on the same night, these were the last two Messier objects in the Virgo Cluster of galaxies I was able to image. I am looking forward to shooting other objects such as nebula and clusters again.

M88 (a.k.a. NGC 4501) is a spiral galaxy about 50 to 60 million light-away in the constellation Coma Berenices. It is one of the fifteen Messier objects that belong to the Virgo Cluster of galaxies. Interestingly, M88 seems to be on an elliptical orbit that is carrying it toward the cluster center, which is occupied by the giant elliptical galaxy M87. M91 (a.k.a. NGC 4548 ) is a barred spiral galaxy located also in the Coma Berenices constellation and is about 63 million light-years away from the earth.

Processing this image proved more difficult as the subtraction method that I have been using on most of the other Virgo galaxies was giving me good results so I went back to Gradient Exterminator to remove the gradients and some of the noise. M88 and M91 represent the 83rd the 84th Messier Object I have captured.



Sky plot

Sky plot


M88 and M91, 


            Kurt Zeppetello