Hemisphere:  Northern  ·  Contains:  Double cluster  ·  NGC 869  ·  NGC 884  ·  The star 7Per
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The Double Cluster, NGC 869/884, Caldwell 14, in Perseus, 



    
        

            Steven Bellavia
The Double Cluster, NGC 869/884, Caldwell 14, in Perseus
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The Double Cluster, NGC 869/884, Caldwell 14, in Perseus

Technical card

Imaging telescopes or lenses: Borg 90FL

Imaging cameras: ZWO ASI183MC Pro

Mounts: Celestron AVX Mount

Guiding telescopes or lenses: Agena Astro 50mm f/3.9 Guidescope

Guiding cameras: ASI224MC

Focal reducers: Borg 0.72X Quadruplet Super Reducer, #7872

Software: IDEIKI AstroPhotography Tool (APT)  ·  Stark Labs Nebulosity 4.2  ·  Digital Photo Professional  ·  PHD2 Guiding

Filters: IDAS UIBAR-III


Dates:Feb. 18, 2019

Frames:IDAS UIBAR-III: 75x20" (gain: 100.00) -15C bin 1x1

Integration: 0.4 hours

Avg. Moon age: 13.42 days

Avg. Moon phase: 97.95%

Bortle Dark-Sky Scale: 4.00

Temperature: -2.00


Basic astrometry details

Astrometry.net job: 2532766

RA center: 2h 20' 41"

DEC center: +57° 7' 22"

Pixel scale: 1.361 arcsec/pixel

Orientation: 8.201 degrees

Field radius: 1.090 degrees


Resolution: 4800x3200

Data source: Backyard

Description

The Double Cluster, NGC 869 and NGC 884 , Cadwell 14, 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 blue-shifted, with NGC 869 approaching Earth at a speed of 39 km/s and NGC 884 approaching at a similar speed of 38 km/s.

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bellavia
Steven Bellavia
License: None (All rights reserved)
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The Double Cluster, NGC 869/884, Caldwell 14, in Perseus, 



    
        

            Steven Bellavia