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Cosmic Challenge: Two Pairs

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#1 PhilH

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Posted 01 May 2020 - 05:28 AM

Most agree that the Messier catalog of deep-sky objects stands as the finest single compilation of star clusters, nebulae, and galaxies visible from the northern hemisphere. When it comes time to single out the finest of the list's 109 entries, however, we often have trouble agreeing. Is it the Orion Nebula, M42; the Great Globular Cluster, M13; or maybe the Ring Nebula, M57? So many choices! One thing is for certain -- you'll never find Messier's 40th entry on anyone's "finest" list.

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#2 optinuke

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Posted 02 May 2020 - 03:31 PM

Gave this a try last night with a 4.5" f/8 reflector from the edge of the Las Vegas Valley, notwithstanding the proximity of the moon.  It was an easy star hop from delta-UMa to M40, though with the bright background M40 wasn't readily visible at 25x.  Increasing magnification to 35x revealed M40, but not very distinctly.  The best view was at 75x, with the double star snapping into view as the eyepiece was focused.

 

The night before this I had looked at M51 and its companion with a 17.5" from the same location, and they were quite washed out, so I didn't even try for NGC 4290 visually last night with the 4.5".  I had seen NGC 4290 and NGC 4284 about a year ago from a dark location through a 16" SCT and had remarked that NGC 4284 was quite faint.

 

Last night I also was regaining familiarity with a Mallincam on a 6" f/4, and decided to see what result I got for the M40/NGC4290/NGC4284 field.  With a field of view roughly equivalent to that of the image by Steve Bellavia, I was pleased to see both galaxies clearly visible after a 60 second exposure.


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#3 PhilH

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Posted 03 May 2020 - 05:40 AM

Last night I also was regaining familiarity with a Mallincam on a 6" f/4, and decided to see what result I got for the M40/NGC4290/NGC4284 field.  With a field of view roughly equivalent to that of the image by Steve Bellavia, I was pleased to see both galaxies clearly visible after a 60 second exposure.

That's great!  How about sharing it here with the rest of us?  waytogo.gif
 



#4 optinuke

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Posted 03 May 2020 - 05:42 PM

I was going to in past replies but I didn't see the usual way to post.  I tried again this month but got a message saying images are disabled for this community.  Did I miss something?

 

Actually went out last night and got the NGC objects in 20 seconds and the brighter PGC in 10 minutes (30 stacked 20 second subs).

 

Jay


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#5 PhilH

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Posted 05 May 2020 - 03:31 AM

I was going to in past replies but I didn't see the usual way to post.  I tried again this month but got a message saying images are disabled for this community.  Did I miss something?

 

Actually went out last night and got the NGC objects in 20 seconds and the brighter PGC in 10 minutes (30 stacked 20 second subs).

 

Jay

It would be great if you could share your results, Jay.  To do that, you'll first need to upload the images into your own CN Photo Gallery.  Once that's done, then you can share them in any forum that you want,  Just watch the file size restrictions.



#6 RyanSem

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Posted 05 May 2020 - 12:06 PM

Last night was clear, so I was able to attempt a challenge for once that wasn't smack dab in all my local light pollution. M40 was easy as can be, but try as I might I couldn't get the others to pop out. Looks like a trip to a darker site is in order for this one!


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#7 optinuke

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Posted 05 May 2020 - 05:54 PM

It would be great if you could share your results, Jay.  To do that, you'll first need to upload the images into your own CN Photo Gallery.  Once that's done, then you can share them in any forum that you want,  Just watch the file size restrictions.

Phil, thanks for the direction...the CN Photo Gallery is new to me.  I uploaded two images from May 2.

 

NGC4290SingleFrame20sec

This image is a single 20 second sub, oriented the same as Steve's image with south up.  Minimal processing was done.  The NGC objects are visible.

 

 

NGC4290BW10min

This is a stack of 30 subs to give 10 minutes total; more processing was done and color suppressed.

 

Looks like PGC 39827 was captured to the left of 70 UMa.  May 2nd's sky was even a little brighter than May 1st.  While these images won't earn any awards, I find it nice to be able to image under much less than ideal conditions.

 

For the record, these were taken with a Mallincam Skyraider 440DSC using a 6" f/4 imaging Newtonian with no coma corrector.

 

Jay


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#8 optinuke

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Posted 22 May 2020 - 01:08 AM

I attempted to see the galaxies from my backyard at the edge of the Las Vegas Valley.  I made attempts with a 17.5" dob and a 16" SCT on different nights.  NGC 4290 was visible in both scopes, with the best views at 230x in the 17.5" and 270x in the 16", though still requiring averted vision.  No luck with NGC 2484 with either scope.  The two stars close to NGC 2484 were clearly visible, but I couldn't tease NGC 2484 out of the background skyglow. 


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#9 PhilH

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Posted 22 May 2020 - 03:44 AM

Phil, thanks for the direction...the CN Photo Gallery is new to me.  I uploaded two images from May 2.

Nice, Jay! Yup, you got them all. Thanks for sharing. 
 




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