NGC 4515 and PGC 41578

This pair of galaxies can be found in the constellation Virgo. There are two spiral galaxies, one edge-on, and the other face-on. From my location on planet Earth, they rise just over 50 degrees above the horizon to the north.

 

PGC 41578 is the smaller face on galaxy in the frame. It is sometimes referred to as NGC4517A, but it is not a NGC object. It’s a challenging target, both a little on the small side and dim. It presents an angular size of 2.05 X 0.98 arcmin.

 

NGC 4517 is an edge-on spiral galaxy. You can see several dark lanes along its length. It presents an angular size of 9.02 V 1.42 arcmin. It is around 40-50 million light-years away.

 

Exposure Details:

Red 16 X 450 Bin 2

Green 21 X 450 Bin 2

Blue 18 X 450 Bin 2

Lum 68 X 600 Bin 1

Total Exposure: 18.2 Hours

 

Instruments:

Telescope: 10" Ritchey-Chrétien RCOS

Camera: SBIG STL-11000 Mono

Mount: Astro-Physics AP-900

Focal Length: 2310.00 mm

Pixel size: 9.00 um

Resolution: 0.82 arcsec/pix

 

Thanks for looking.

 

Done