Contains:NGC 884, Double cluster, NGC 869, The star 7Per
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Double Cluster - Deep Sky West Remote Observatory, 




    

        Deep Sky West (Ll...
Double Cluster - Deep Sky West Remote Observatory

Double Cluster - Deep Sky West Remote Observatory

Link to TIFF/FITS: http://www.deepskywest.com

Technical card

Resolution: 1864x1332

Dates: Oct. 22, 2017

Frames:
Astrodon Blue Tru-Balance E-Series Gen 2: 18x300" bin 1x1
Astrodon Green Tru-Balance E-Series Gen 2: 24x300" bin 1x1
Astrodon Red Tru-Balance E-Series Gen 2: 18x300" bin 1x1

Integration: 5.0 hours

Avg. Moon age: 2.53 days

Avg. Moon phase: 7.07%

Astrometry.net job: 1781874

RA center: 35.133 degrees

DEC center: 57.152 degrees

Pixel scale: 2.096 arcsec/pixel

Orientation: 0.127 degrees

Field radius: 0.667 degrees

Locations: Deep Sky West Remote Obsevatory (DSW), Rowe, New Mexico, United States

Description

From Wiki:
The Double Cluster (also known as Caldwell 14) is the common name for the open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. Both visible with the naked eye, NGC 869 and NGC 884 lie at a distance of 7500 light years. NGC 869 has a mass of 3700 solar masses and NGC 884 weighs in at 2800 solar masses; however, later research has shown both clusters are surrounded with a very extensive halo of stars, with a total mass for the complex of at least 20,000 solar masses. Based on their individual stars, the clusters are relatively young, both 12.8 million years old. In comparison, the Pleiades have an estimated age ranging from 75 million years to 150 million years. There are more than 300 blue-white super-giant stars in each of the clusters. The clusters are also blueshifted, with NGC 869 approaching Earth at a speed of 39 km/s (24 mi/s) and NGC 884 approaching at a similar speed of 38 km/s (24 mi/s).[5] Their hottest main sequence stars are of spectral type B0.

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sixburg
Deep Sky West (Ll...
License: Attribution-NonCommercial-NoDerivs Creative Commons
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Double Cluster - Deep Sky West Remote Observatory, 




    

        Deep Sky West (Ll...

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