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M15 is possibly the densest globular cluster in the Milky Way
galaxy. The core of M15 has undergone "core collapse". M15 also contains a planetary nebula near its center called
Pease 1, a rare occurrence among globulars. The brightest stars in this globular are 1000 times brighter than the
sun, and the total luminosity of the cluster equals 360,000 suns. That's a huge amount of energy! The image below turned
out very well; I can barely see this object visually in my telescope because of light pollution.
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Globular Cluster M15
(Click image
to enlarge)
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Object Details:
Type:
Globular star cluster
Constellation: Pegasus
Distance: 33,600 light-years
Diameter:
175 light-years
Upper Image Details:
Date: Sept 19, 2015
Site: Harahan, LA
Exposure:
CCD, 5 x 3 min.
Filters: IDAS LPS V4 48mm
Processing: MSB Astroart 5.0
Telescope:
4" Tak FSQ-106N
Reducer: None (f/5.0)
Image CCD: SX Trius 694C Color
Guide CCD: SX MX7C (w/ Barlow)
Guide Scope: AT66ED,
ScopeStuff TBSX
Lower Image Details:
Date: August 7, 2004
Site: Harahan, LA
Exposure: CCD, 7 x 2 min.
Filters:
Orion SkyGlow LPR
Processing: MSB Astroart 3.0
Telescope: 10" Meade LX200
Reducer:
Meade, f/4.3
CCD: Starlight Express MX7C
Autoguider:
S.T.A.R. 2000
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For more on globular clusters, see my M13 (Hercules) Globular
Cluster page.
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