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Test Pairs for smaller scopes up to 80mm aperture

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#1 Cotts

Cotts

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Posted 21 June 2021 - 08:20 AM

Stella Doppie makes it so easy to make lists with very specific criteria.   Asking for separations from 1.3" to 3.5" with small Δmag and a primary brighter than 7.0 is just a few key clicks.

 

I tidy up the list a bit in my word processor but CN just butchers the tabs anyway.  Separations are in bold.... This list works all year...

 

     RA ....... Dec .........Ident.   PA.... Sep ..M1... M2

 00 06 16 +58 26 12  STF 3062   5  1.50  6.42  7.32       

 01 19 48 -00 30 32  STF 113 A,BC  22  1.60  6.45  6.99  
 01 49 15 +47 53 47  STF 162 AB   198  2.00  6.47  7.22  
 01 50 09 +22 16 30  STF 174   164  2.90  6.33  7.21  
 02 02 03 +02 45 49  STF 202 AB   261  1.80  4.10  5.17 
 02 59 13 +21 20 26  STF 333 AB   210  1.30  5.17  5.57 
 03 30 11 +59 21 58  STF 389 AB   72  2.60  6.42  7.89  
 05 11 45 +01 02 12  STF 652   180  1.70  6.26  7.44  
 05 30 47 +05 56 53  STF 728   44  1.40  4.44  5.75 
 05 31 15 +03 17 32  STF 729 AB   26  1.80  5.71  6.74  
 06 46 14 +59 26 30  STF 948 AB   65  1.90  5.44  6.00 
 08 54 15 +30 34 46  STF 1291 AB   309  1.50  6.09  6.37 
 11 18 11 +31 31 45  STF 1523 AB   153  2.20  4.33  4.80 
 11 34 42 +16 47 49  STF 1552 AB   209  3.10  6.26  7.31  
 14 49 41 +48 43 16  STF 1890   46  2.60  6.31  6.67 
 16 30 55 +01 59 03  STF 2055 AB   45  1.40  4.15  5.15 
 16 36 14 +52 55 28  STF 2078 AB   104  3.10  5.38  6.42  
 17 05 20 +54 28 14  STF 2130 AB   358  2.60  5.66  5.69 
 18 44 20 +39 40 12  STF 2382 AB   344  2.30  5.15  6.10 
 18 44 23 +39 36 46  STF 2383 CD   74  2.40  5.25  5.38 
 18 45 28 +05 30 00  STF 2375 AB   120  2.60  6.34  6.73  
 19 48 42 +11 48 57  STF 2583 AB   105  1.40  6.34  6.75  
  20 55 41 +04 31 58  STF 2735   282  2.00  6.45  7.54  
  20 58 30 +50 27 42  STF 2741 AB   25  2.00  5.94  6.79  
  21 02 09 +56 40 11  STF 2751   356  1.60  6.23  6.89  
  21 44 09 +28 44 33  STF 2822 AB   322  1.50  4.75  6.18 
  22 28 50 -00 01 12  STF 2909 AB   158  2.40  4.34  4.49 
  23 59 29 +33 43 27  STF 3050 AB   342  2.50  6.46  6.72

 

Sorry about the lack of "common" names or Bayer designations.  I find these with my Nexus' STF list....

 

And, due diligence on the separations.  There is a rich history of inaccurate published measures.....

 

Dave

 


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#2 Cotts

Cotts

    Just Wondering

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Posted 21 June 2021 - 08:26 AM

Rayleigh Criterion for dark sky split: 138/Dmm

Dawes "limit" for deep notch: 116/Dmm

 

Can your wee scope take you into "Sub Rayleigh" territory?  "Snowman", "Peanut", "Oval".......???

 

Radius to center of first diffraction ring: 163/Dmm

 

Radius to center of second ring: 418/Dmm

 

Dave




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