NGC 4565

Click on the image to display it full screen
Date
2015/04/22

Observation place
 Spain

Technical

TelescopePlanewave 431mm - 17 ″, 2mm FL, f / 939
MountParamount ME
Imaging cameraSBIG STL-11000M - regulated at -20o Celsius
Image typeL (RGB) (Vs for synghetic green)
ExhibitionLuminance (10 x 6,67 'bin 2 × 2), R and B (3 x 3' bin 3 × 3 each)
PretreatmentMaxim DL
TreatmentPhotoshop and PixInsight
Specific treatmentCreate a synthetic green image

Object description

Object typeSpiral galaxy seen from the section "The needle galaxy"
ConstellationBerenice's hair
Visual magnitude9,6
Distance42 million light years
Diameter100000 light years
Dimension seen from Earth15,8 x 2,1 arc minutes
NGC 4565, also known as the Needle Galaxy, is an edge-on spiral galaxy located approximately 42 million light-years from Earth in the constellation Berenike's Hair. It was discovered by William Herschel in 1. With a diameter of about 785 light-years, it is characterized by an important band of dust which seems to separate its central radiation in two. It is moving away from the earth at the speed of 100000 kilometers per second.  

In my opinion, NGC4565 is the finest example of a spiral galaxy seen from the edge. From a site with little light pollution, it is visible in small telescopes.  

In my image, we notice the presence of several other galaxies around NGC4565 (note: north is on the left). Click on this link to see them :

- NGC4565A - magnitude +13

- NGC4565B - magnitude +14

- NGC4565C - magnitude +15

- IC3582 - magnitude +16

- IC3571 - magnitude +16  

These galaxies are over 50 million light years from Earth! There are therefore 6 galaxies visible in the image (including NGC4565). Considering that each galaxy contains billions of stars and that the field of view of the image is about the diameter of the Moon, therefore a tiny portion of the sky, we can appreciate the immensity of our universe.
Richard Beauregard
Sky Astro - CCD
My impression "We cannot be alone in this gigantic universe"