Celestial hemisphere:  Southern  ·  Constellation: Virgo (Vir)  ·  Contains:  M 104  ·  NGC 4594  ·  Sombrero Galaxy
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M104 (Sombrero Galaxy), Ben Hayes
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M104 (Sombrero Galaxy)

Getting plate-solving status, please wait...
M104 (Sombrero Galaxy), Ben Hayes
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M104 (Sombrero Galaxy)

Equipment

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Acquisition details

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Description

What a cool little galaxy!   No wonder so many people image it.  Only captured around 1¾ hours of data on this target, which fit the warm May evening's weather and my work/sleep schedule ;-).  With a bright moon and very little integration time, there are virtually no details visible in the ring or core, but my primary goal was just to see what it looked like through the 8" Meade LX200 classic SCT.   Had just re-collimated the scope, which combined with the new Starizona SCT Corrector IV field flattener/focal reducer made a huge difference on the stars.** I still have a long way to go to familiarize myself with this little blue scope.  It can feel frustrating at times, but I'm not giving up. I made a note to come back to this galaxy later and give it the time it deserves.   Also took a wide-field image of it with a RedCat51 (image C).

Collimation notes

For collimating my little Schmidt-Cassegrain telescope,  I remove the focal reducer/field flattener, filter drawer, and ASI294MC camera train from the 2" JMI focuser tube and insert a 22mm Nagler eyepiece in the tube to get an airy disk at the native focal length of the telescope (2000mm).  I know the experts suggest collimating only using an eyepiece, but I got so tired of kneeling on the ground and straining my neck, that I removed the eyepiece and inserted a ZWO ASI385MC camera into the 2" tube and used SharpCap Pro software to view the airy disk on a Windows laptop.   Below is a screenshot of what it looks like.  This spring, I started using the CollimationCircles™ application (I had v. 1.0.8 installed; it's now up to v. 2.1.1) to help with collimation - both with checking the symmetry of the airy disk rings, but also which knobs on the secondary mirror to tweak.   There is a very informative thread on the CloudyNights forum, which includes comments and links from the developer (sajmons) on how to find the software on his Saimons Astronomy GitHub site and install it.  CollimationCircles™ runs on Windows, Linux, and Mac (x64 processors only; a version for M-based processors is in the works) and it is a handy thing to have.  The software overlays a clear window with cross-hairs which you drag around your screen; in the case the SharpCap live video screen.   This is probably rudimentary to experienced astronomers, but it was  a big deal to me. 

image.png

Comments

Revisions

  • Final
    M104 (Sombrero Galaxy), Ben Hayes
    Original
  • M104 (Sombrero Galaxy), Ben Hayes
    B
  • M104 (Sombrero Galaxy), Ben Hayes
    C

B

Title: Same as original (image A), but includes the acquisition details at bottom.

Uploaded: ...

C

Title: Widefield image of M104 taken with RedCat51 telescope and ASI294MC camera, with facts about the galaxy.

Uploaded: ...

Sky plot

Sky plot

Histogram

M104 (Sombrero Galaxy), Ben Hayes

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