NGC 4656 and NGC 4657
NGC 4656 appears much larger than 4657.  The both galaxies have a bright central region, but the dim outer regions are difficult from light polluted skies, even with an 80 minute exposure.  The galaxy is irregular in shape and sometimes called the "hockey stick"  with NGC 4657 being the puck.  You will need dark skies and at least a 6" scope to see it visually.  You should be able to locate it by star hopping down from Corcarol.
    Constellation:  Canes Venatici

    Size:  15.3x2.9  arcmin

    Magnitude:  11.0 

    Surface Brightness: 13.9

    RA:  12h 43m 58s 

    Dec: 32d 10m 18s 


Scope:   8" LX 200 SCT
MX-5C CCD, STAR 2000 and IDAS LPR
Focal Ratio: f4.8
Exposure:  80 min
Reserved for Future Image
Scope:   8" LX 200 SCT
MX-5C CCD Camera
Focal Ratio: f4
Exposure:  min
Link to SEDS NGC Catalog

Link to IAAC Visual Observations Page

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