Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  The star Garnet Star (μCep)
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Mu Cephe, The Garnet Star HIP 107259 and Surrounding Nebulosity, 



    
        

            Randal Healey
Mu Cephe, The Garnet Star HIP 107259 and Surrounding Nebulosity
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Mu Cephe, The Garnet Star HIP 107259 and Surrounding Nebulosity

Getting plate-solving status, please wait...
Mu Cephe, The Garnet Star HIP 107259 and Surrounding Nebulosity, 



    
        

            Randal Healey
Mu Cephe, The Garnet Star HIP 107259 and Surrounding Nebulosity
Powered byPixInsight

Mu Cephe, The Garnet Star HIP 107259 and Surrounding Nebulosity

Technical card

Imaging telescopes or lenses: Celestron 9.25 sct XLT

Imaging cameras: SBIG STF-8300M

Mounts: Celestron CGEM-DX

Guiding telescopes or lenses: Orion Mini 50mm Guide Scope Orion 50mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider

Focal reducers: Celestron Reducer, f/6.3 Celestron

Software: PHD2 Guiding PHD 2.5  ·  PixInsight 1.8 Ripley  ·  PhotoShop CS6  ·  Sequence Generator Pro SGP

Filters: Astrodon HA 36mm - 5nm  ·  Astrodon BLUE 36mm - Gen2 E-Series Tru-Balance  ·  Astrodon RED 36mm - Gen2 E-Series Tru-Balance  ·  Astrodon GREEN 36mm - Gen2 E-Series Tru-Balance

Accessory: Explore Scientific 2" Field Flattener  ·  Home Observatory (Self Designed)  ·  Orion Starshoot Autoguider  ·  MoonLite Crayford 2.5" Moonlight Motor Focuser


Dates:Aug. 1, 2019Aug. 2, 2019Aug. 3, 2019Aug. 4, 2019

Frames:
Astrodon BLUE 36mm - Gen2 E-Series Tru-Balance: 24x180" (1h 12') -10C bin 1x1
Astrodon GREEN 36mm - Gen2 E-Series Tru-Balance: 19x180" (57') -10C bin 1x1
Astrodon HA 36mm - 5nm: 26x600" (4h 20') 10C bin 1x1
Astrodon RED 36mm - Gen2 E-Series Tru-Balance: 23x180" (1h 9') -10C bin 1x1

Integration: 7h 38'

Darks: 50

Flats: 50

Flat darks: 50

Bias: 100

Avg. Moon age: 2.17 days

Avg. Moon phase: 6.91%


Basic astrometry details

Astrometry.net job: 2848279

RA center: 21h 41' 51"

DEC center: +58° 34' 22"

Pixel scale: 0.834 arcsec/pixel

Orientation: 189.297 degrees

Field radius: 0.471 degrees


Resolution: 3243x2455

Locations: Healey "Utahopia" Observatory, Kaysville, Utah, United States

Data source: Own remote observatory

Description

The Garnet Star HD 206936, HIP 107259

Mu Cephei, referred to as the "garnet star" by Herschel in 1783, is thought to be the largest star visible to the naked eye. It is a red supergiant, spectral class M2 Ia, 15 times more massive than the Sun, but 1260-1650 times larger in diameter, and 2-4 billion times more voluminous than the Sun. If the star were placed into our Solar System its surface would extend between the orbits of Jupiter and Saturn. The star is known to be a semi-regular variable with apparent magnitude range 3.4 - 5.1, and a period around 2.5 years. It completed hydrogen to helium fusion, and is presently fusing helium into carbon. In the relatively near future, when it has converted its elements into iron, nuclear fusion will stop, and the star will undergo gravitational collapse resulting in a massive supernova explosion. Depending on the method used, distance estimates for the Garnet Star vary widely between 1,200 and 32,000 LY.

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Mu Cephe, The Garnet Star HIP 107259 and Surrounding Nebulosity, 



    
        

            Randal Healey

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