Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  7 rho Cas  ·  8 sig Cas  ·  NGC 7789  ·  NGC7789  ·  The star ρCas  ·  The star σCas  ·  V373 Cas
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NGC 7789 - Caroline's Rose - Open Cluster in Cassiopeia, 


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NGC 7789 - Caroline's Rose - Open Cluster in Cassiopeia

Imaging telescopes or lenses: Takahashi FSQ 106ED f/5

Imaging cameras: FLI Microline CCD

Mounts: Takahashi EM-400

Software: DeepSkyStacker, GIMP, Fitswork, Pixlr, Lightroom

Filters: Astrodon LRGB + Ha

Accessory: Calvados  ·  Reading Glasses!!!

Dates:Sept. 17, 2018

Frames: 3x300"

Integration: 0.2 hours

Avg. Moon age: 7.86 days

Avg. Moon phase: 55.03%

Astrometry.net job: 2265515

RA center: 23h 57' 22"

DEC center: +56° 43' 8"

Pixel scale: 7.000 arcsec/pixel

Orientation: 4.616 degrees

Field radius: 2.341 degrees

Resolution: 1336x2004

Locations: ORM, La Palma, Spain

Data source: Professional, scientific grade data


Found among the rich starfields of the Milky Way, star cluster NGC 7789 lies about 8,000 light-years away toward the constellation Cassiopeia. A late 18th century deep sky discovery of astronomer Caroline Lucretia Herschel, the cluster is also known as Caroline's Rose. Its flowery visual appearance in small telescopes is created by the cluster's nestled complex of stars and voids. Now estimated to be 1.6 billion years young, the galactic or open cluster of stars also shows its age. All the stars in the cluster were likely born at the same time, but the brighter and more massive ones have more rapidly exhausted the hydrogen fuel in their cores. These have evolved from main sequence stars like the Sun into the many red giant stars shown with a yellowish cast. Using measured color and brightness, astronomers can model the mass and hence the age of the cluster stars just starting to "turn off" the main sequence and become red giants. Over 50 light-years across, Caroline's Rose spans about half a degree (the angular size of the Moon) near the center of the wide-field telescopic image.
- Guillaume Seigneuret APOD

Part of Caroline Herschel's epitaph reads as follows:
"The gaze of her who has passed to glory was, while below, turned to the starry Heaven"
which I think is most fitting and proper indeed.

I manage to sneak 5 minutes subs for three succesive nights to make this image, RGB each 300 seconds. Think turned out nicely and a really nice field in wide view.


Sky plot

Sky plot


NGC 7789 - Caroline's Rose - Open Cluster in Cassiopeia,