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Contains:  NGC 884, Double cluster, NGC 869, The star 7Per
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NGC 869 and NGC 884 - The Double Cluster, 





    
        

            Michel Makhlouta
NGC 869 and NGC 884 - The Double Cluster

NGC 869 and NGC 884 - The Double Cluster

Technical card

Resolution: 3280x2523

Dates:Nov. 1, 2019Nov. 2, 2019Nov. 3, 2019

Frames:
ZWO Blue 31mm: 65x60" (gain: 75.00) -20C bin 1x1
ZWO Green 31mm: 65x60" (gain: 75.00) -20C bin 1x1
ZWO RED 31mm: 65x60" (gain: 75.00) -20C bin 1x1

Integration: 3.2 hours

Darks: ~50

Flats: ~50

Bias: ~200

Avg. Moon age: 5.58 days

Avg. Moon phase: 31.53%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 3037812

RA center: 2h 20' 11"

DEC center: +57° 9' 57"

Pixel scale: 2.015 arcsec/pixel

Orientation: 0.083 degrees

Field radius: 1.158

Locations: Home, Batroun, North, Lebanon

Data source: Backyard

Description

the Double Cluster, or Caldwell 14, is the name for two open clusters – NGC 869 and NGC 884 – located close together in Perseus constellation. The clusters both lie at an approximate distance of 7,600 light years from Earth and are about 12.8 million years old, a relatively young age.

Both clusters are approaching us at a speed of 38-39 km/s.

The Double Cluster has been known since ancient times, but first catalogued only around 130 BC, when the Greek astronomer Hipparchos mentioned it as a “nebula” or “cloudy spot” in his writings. In mythology, they represent the jeweled handle of Perseus’ sword, given to the hero by the gods, along with a shield and a helmet, to help him in his challenges.

Source: Constellation Guide

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makhlouta
Michel Makhlouta
License: None (All rights reserved)
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NGC 869 and NGC 884 - The Double Cluster, 





    
        

            Michel Makhlouta