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Contains:  M 14, NGC 6402
Getting plate-solving status, please wait...
M14 Globular Cluster, 



    
        

            Jerry Macon
M14 Globular Cluster
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M14 Globular Cluster

Technical card


Dates:June 11, 2019

Frames:
Astrodon Gen 2 L 36mm: 153x40" (gain: 99.00) -12C bin 1x1
Astrodon Gen 2 RGB 36mm: 83x40" (gain: 99.00) -16C bin 1x1

Integration: 2.6 hours

Avg. Moon age: 8.74 days

Avg. Moon phase: 64.20%

Bortle Dark-Sky Scale: 4.00

Temperature: 10.00


Basic astrometry details

Astrometry.net job: 3235051

RA center: 17h 37' 35"

DEC center: -3° 14' 49"

Pixel scale: 0.701 arcsec/pixel

Orientation: 177.544 degrees

Field radius: 0.271 degrees


Resolution: 2200x1708

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

Images from the following two scopes (piggybacked) contributed to this image:
AG12+ASI1600MM at .70 asec/pix (RGB)
TV127is+ASI183MM at .75 asec/pix. (RGB)
They were all registered to the best R image taken on the AG12.

Messier 14 (also known as M14 or NGC 6402) is a globular cluster of stars in the constellation Ophiuchus. It was discovered by Charles Messier in 1764.

At a distance of about 30,000 light-years, M14 contains several hundred thousand stars. At an apparent magnitude of +7.6 it can be easily observed with binoculars. Medium-sized telescopes will show some hint of the individual stars of which the brightest is of magnitude +14.

The total luminosity of M14 is in the order of 400,000 times that of the Sun corresponding to an absolute magnitude of -9.12. The shape of the cluster is decidedly elongated. M14 is about 100 light-years across.

A total of 70 variable stars are known in M14, many of the W Virginis variety common in globular clusters. In 1938, a nova appeared, although this was not discovered until photographic plates from that time were studied in 1964. It is estimated that the nova reached a maximum brightness of magnitude +9.2, over five times brighter than the brightest 'normal' star in the cluster.

Comments

Author

jmacon
Jerry Macon
License: Attribution Creative Commons
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M14 Globular Cluster, 



    
        

            Jerry Macon