M13
Object: M13
Optics: Planewave CDK 12.5" f/8.0
Idas LPS filter
Camera: SBIG STL11Km
CCD temperature: -10°C
Exposure: 1X1 R-110min(22X5m), Gs-(R+B)/2, B-110min(22X5m)
Mount: Takahashi EM-400
Image processing: Maxim DL, PhotoshopCS4
Quebec, Qc,
Canada
August 12, 2010
M13, discovered by Edmund Halley in 1714 is considered the finest globular cluster in the northern hemisphere. Its relatively short distance of 22,000 light years allows small telescopes to resolve the stars of this object. Its diameter is 140 light years and it glows with an intensity equivalent to 250,000 times that of the Sun. The density of stars in the cluster is about 500 times higher than that around the Sun and yet, the risk of interstellar collisions is negligible.
The 12.2th magnitude spiral galaxy NGC6207 is visible in the upper right and the small 15th magnitude galaxy IC4617 is visible between the two objects. Some small 16-17th magnitude galaxies are also noticeable in the higher resolution image.
Previous attempts
Object: M13
Optics: Takahashi TOA-150 f/7.3
Camera: SBIG ST-10XME
CCD temperature: -10°C
Exposure: Bin 1X1 L-12min(3X4m), Bin 2X2 R-4min, G-4min, B-4min
Mount: Takahashi EM-400
Image processing: CCDSoft (Réduction), MaxIm DL et Photoshop
Quebec, Qc
Canada
July 30, 2006
Object: M13
Optics: Televue Genesis f/5 Apo Refractor
Caméra: SBIG ST-10XME
CCD temperature: -10°C
Exposure: Bin 1X1 L-54min, R-54min, G-54min, B-66min
Mount: Takahashi EM-200
Image processing: CCDSoft (Réduction), MaxIm DL et Photoshop
Quebec, Qc
Canada
July 8, 2005
Object: M13
Optics: Celestron SCT 8" f/10
Caméra: SBIG ST-10XME
CCD temperature: -10°C
Exposure: Bin 1X1 L-20min(3X4m), Bin 2X2 R-16min, G-14min, B-30min
Mount: Takahashi EM-200
Image processing: CCDSoft (Réduction), MaxIm DL et Photoshop. LR deconvolution of the luminance with AIPWin
Quebec, Qc
Canada
August 1, 2003