M5 image, how many galaxies are visible?

[han59]

This image was made two days ago when the M5 global cluster was near the meridian. The second image shows by annotation how many galaxies are hidden within the image. Most galaxies are recognisable. It is quite astounding how much is visible. Unfortunately I can post only compressed JPEG images, but the full resolution link is already  better. Annotation by the latest version of the ASTAP program using the HyperLeda database.

-- Han

Equipment:

Telescoop 100 mm APO astrograph APO100Q, F5,8
Camera ASI1600MM-Cool
Exposure: 28 x 50 sec
Software CCDciel, ASTAP
Datum: 2019-4-28

full resolution

 

 

Full resolution:

[don4l]

On 30/04/2019 at 20:56, han59 said:

This image was made two days ago when the M5 global cluster was near the meridian. The second image shows by annotation how many galaxies are hidden within the image. Most galaxies are recognisable. It is quite astounding how much is visible. Unfortunately I can post only compressed JPEG images, but the full resolution link is already  better. Annotation by the latest version of the ASTAP program using the HyperLeda database.

-- Han

Equipment:

Telescoop 100 mm APO astrograph APO100Q, F5,8
Camera ASI1600MM-Cool
Exposure: 28 x 50 sec
Software CCDciel, ASTAP
Datum: 2019-4-28

 

Hello Han,

I've been playing with this.  It's excellent!

At first, the labels were far too large, and overlapped each other.  However, if I zoom in before annotating, it uses a smaller font.  I mention this in case other people have the same issue.

 

 

 

[han59]

 

On 06/05/2019 at 12:28, don4l said:

At first, the labels were far too large, and overlapped each other.  However, if I zoom in before annotating, it uses a smaller font.  I mention this in case other people have the same issue.

 

 

 

Yes you remind me , I have put that in the hint and manual.  The font is depending on the zoom factor.  Maybe it is better for HyperLeda annotation to make fontsize always small.

I did the same for M13. Here a part of the image:

 

 

 

[kirkster501]

It is amazing how many PGC galaxies are visible in many images.  Astonishing that you can capture stuff 10 billion light years away with amateur equipment.  The background of Leo and Virgo and that general area shows many galaxies vastly more distant than the Virgo cluster.

[han59]

don4l, 

  In ASTAP version 0.9.211 is the font for HyperLeda annotation fixed at 8. I hope you like it. Feedback is welcome.

kirkster501,

  Yes and each has galaxy has typical 100.000 million stars.

[don4l]

1 hour ago, han59 said:

don4l, 

  In ASTAP version 0.9.211 is the font for HyperLeda annotation fixed at 8. I hope you like it. Feedback is welcome.

kirkster501,

  Yes and each has galaxy has typical 100.000 million stars.

That looks perfect.

I must say that once I had figured out the zooming bit I was very happy, but this will save new users some confusion.

I'm currently moving to linux. Tonight, I tried CCDCiel with both ASTAP and a local Astronomy.net. 

Platesolves were *much* faster on ASTAP (with G17) -  1 second versus 28 seconds.  I used two copies of  the same image.