David's Astronomy Pages (Sky Tours)
May (2) - Hercules

Image collection based on the sky tour "Astronomical labours in Hercules" featured in the May 2012 edition of Astronomy Now. Comprising a mixture of stars and deep sky objects in Hercules.

Bullet  1. Alpha Herculis - Star (Rasalgethi) 
Bullet  2. NGC 6210 - Planetary Nebula (Turtle Nebula)
Bullet  3. Abell 39 - Planetary Nebula (PLN 47+42.1)
Bullet  4. Zeta Herculis - Binary Star
Bullet  5. M13 - Globular Cluster
Bullet  6. NGC 6207 - Spiral Galaxy
Bullet  7. M92 - Globular Cluster (NGC 6341)
Bullet  8. AC Herculis - Variable Star (RV Tauri type)
 

1.  Alpha Herculis - Star (Rasalgethi) 

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2.  NGC 6210 - Planetary Nebula (Turtle Nebula)

NGC 6210 (Hercules)
Image
Approximate Colour CCD Image
Red : 2 x 60 sec exposure (R Filter)
Green : 2 x 60 sec exposure (V Filter) 
Blue : 2 x 120 sec exposure (B Filter)
1x1 binning (insert at 400% size)
2006-05-06 00:26h UT (#122181-86)

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3.  Abell 39 - Planetary Nebula (PLN 47+42.1)

Abell 39 / PLN 47+42.1 (Hercules)
Image 
CCD Image (slight smoothed, 50%, )
8 x 90s sec exposure (average combine), 3x3 binning, C Filter
2012-10-15 21:18 h UT (#515213-20)
12" LX200R  (at f/9.7) + ST-10XME
[ internet picture showing Abell 39 for reference, by Capella Observatory ]
 
Image 
Negative CCD Image (Gamma adjusted)
Image details as above

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4.   Zeta Herculis - Binary Star

 Zeta Herculis / HIP 81693 / SAO 65485 / Struve 2084 (Hercules)
Image
CCD Image (50% size)
20s exposure (single frame), 3x3 binning, C Filter
2015-05-08 00:58 h UT (#587080)
12" LX200R  (at f/10.4) + ST-10XME
 
Zeta Herculis - detail
Binary components are very difficult to space. 3 frames were taken (0.12s exposure, 10s apart)
All 3 frames indicate an asymmetry in the star object and suggests a second star is present
with an estimated spacing of 2-3 pixels from the brightest one  (equivalent to 1.5 to 2.5 arc secs)
Catalog details for Struve 2084,   A: Mag +3.0, B: Mag +6.5
Image
Composite CCD Image (3 frames with 500% insert)
0.12s exposure (3 frames, 10s apart), 2x2 binning, C Filter
2015-05-08 00:59 h UT (#587081-83)
12" LX200R  (at f/10.4) + ST-10XME

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5.   M13 - Globular Cluster

M13 (Hercules) 
Image
CCD Image (Square root scaling)
10s, 2x2 binning, R Filter
2009-03-10 00:20 h UT  (#356196)
12" LX200R  (at f/5.8) + ST-10XME

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6.   NGC 6207 - Spiral Galaxy

NGC 6207 / Herschell II-701 (Hercules) 
Image
CCD Image (Linear Scale, 50% size)
6 x 90s exposure (average combine), 3x3 binning, C Filter
2015-04-21 02:33 h UT (#585182-88)
12" LX200R  (at f/10.4) + ST-10XME
  
NGC 6207 - detail
Image
CCD Image (Linear Scale, 100% size, cropped)
Image details as above
 
Image
Negative CCD Image (Linear Scale, 100% size, cropped)
Image details as above

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7.   M92 - Globular Cluster

M92 (Hercules)
Image
CCD Image, Log Scale
30s, 2x2 binning, C Filter
2006-08-26  23:05 h UT (#135121)

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8.  AC Herculis - Variable Star (RV Tauri type)

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