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MELOTTE 15

Classification: Ope
Constellation: Cassiopeia (Cas)
Object Location: Ra 02h 33m 48s Dec +61° 31’
Size & Distance: 21 x 21 Apx 7500 light-years.

Date & Location: 09-16-2012 Palomar Mountain, CA
Exposure: Hubble Palette HSHO, Ha=L, Sll=R, Ha=G, Olll=B, 8 ea. @ 15min. (bin 1x1)
Optics: Telescope Engineering Company AP
Mount: Astro-Physics 900 GTO / ATS 10x3
Camera: SBIG-10XME @-10c / FLI-PDF / Guided by TV60 / SBIG-ST402
Filters: Astrodon 3nm Ha, Sll, Olll.
Software: MaxImDL 4.56, Photoshop CS5, Topaz Labs.

Notes: Sky conditions: Above average seeing, Light wind, Temp 66°
Image Field of view is 29 x 44 arcmin.
This image was an Astronomy Magazine Picture Of The Day. Feb,9 2017
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Center of the Heart nebula IC1805 / Sh2-190, also known as Melotte 15 (Mel 15) is an open cluster of stars and contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun's mass.
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