Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1805
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Melotte 15, 


            Marco Prelini
Melotte 15
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Melotte 15

Technical card

Imaging telescopes or lenses: Sky-Watcher 200/1000 PDS

Imaging cameras: ZWO ASI 294MC Pro

Mounts: Sky-Watcher AZ EQ6-GT

Guiding telescopes or lenses: Artesky Ultraguide 60/240 mm

Guiding cameras: ZWO ASI 120 MM Mini

Software: Photoshop CC  ·  Sequence Generator Pro  ·  PixInsight

Filters: Baader OIII 2.0" 7nm CCD  ·  Baader Ha 2" 7nm CCD

Dates:Sept. 2, 2019Sept. 3, 2019

Baader Ha 2" 7nm CCD: 14x480" (gain: 120.00) -10C bin 1x1
Baader OIII 2.0" 7nm CCD: 14x480" (gain: 120.00) -10C bin 1x1

Integration: 3.7 hours

Darks: ~21

Flats: ~21

Bias: ~21

Avg. Moon age: 4.10 days

Avg. Moon phase: 18.09%

Bortle Dark-Sky Scale: 7.00

Temperature: 25.00

Basic astrometry details

Astrometry.net job: 2899366

RA center: 2h 33' 30"

DEC center: +61° 32' 2"

Pixel scale: 0.946 arcsec/pixel

Orientation: 95.959 degrees

Field radius: 0.647 degrees

Resolution: 2760x4080

Locations: Home Backyard, Meda, Milano, Italy

Data source: Backyard


Exactly at the center of IC 1805, better known as "heart nebula" is a small open star cluster recognized as "Melotte 15". In this cluster there are 50 times more massive stars than our sun and a microquasar: a small black hole complete with an accretion disk.


Sky plot

Sky plot


Melotte 15, 


            Marco Prelini

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