Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1805
Melotte 15 in the heart of hearts, 



    
        

            Kharan
Melotte 15 in the heart of hearts
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Melotte 15 in the heart of hearts

Melotte 15 in the heart of hearts, 



    
        

            Kharan
Melotte 15 in the heart of hearts
Powered byPixInsight

Melotte 15 in the heart of hearts

Acquisition details

Dates:
Oct. 3, 2020 ·  Oct. 4, 2020
Frames:
Baader Blue 2": 25×300(2h 5′) -30°C bin 1×1
Baader Green 2": 25×300(2h 5′) -30°C bin 1×1
Baader L 2'': 25×300(2h 5′) -30°C bin 1×1
Baader Red 2": 25×300(2h 5′) -30°C bin 1×1
ZWO Ha 7nm: 28×300(2h 20′) -30°C bin 1×1
Integration:
10h 40′
Flats:
20
Bias:
100
Avg. Moon age:
16.66 days
Avg. Moon phase:
95.80%

Basic astrometry details

Astrometry.net job: 3906660

RA center: 02h33m32s.2

DEC center: +61°3509

Pixel scale: 1.108 arcsec/pixel

Orientation: 56.593 degrees

Field radius: 0.502 degrees

Resolution: 2638x1914

File size: 5.7 MB

Locations: Puolivälinkangas - Oulu, Oulu, Finland

Data source: Backyard

Description

Melotte 15 is the open star cluster at the heart of IC 1805. It's radiation causes the surrounding nebula to glow.

The cluster contains very young, blue, hot supergiant stars about 1.5 million years old. It is located near the nebula’s centre and home to several bright stars with a mass almost 50

times that of the Sun, as well as many faint stars far less massive than the Sun. Melotte 15 once contained a microquasar, a radio emitting X-ray binary system, but the system was expelled

from the cluster millions of years ago.

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Sky plot

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Histogram

Melotte 15 in the heart of hearts, 



    
        

            Kharan