Observation by John Hughes: Melotte 15

Uploaded by

Mr John William Hughes


John Hughes


2021 Oct 20 - 01:00


2021 Oct 23 - 11:36


The Heart Nebula (IC1805)

Planetarium overlay



Field centre

RA: 02h33m
Dec: +61°25'
Position angle: -45°29'

Field size

0°37' × 0°25'


iTelescope, Nerpio, Spain

Target name

Melotte 15


Melotte 15

About this image
Melotte 15 is an open star cluster located in the heart of the Heart Nebula (IC1805).
It is relatively ‘new' being some 1.5 million years young and the stellar wind from its stars have sculpted the dust clouds seen in this image.
Melotte 15 is approximately 7,500 light years away located in the constellation, Cassiopeia.
This image was captured in narrowband using Hydrogen alpha, Oxygen 3 and Sulphur 2 filters from the iTelescope remote observatory in Nerpio, Spain.
Although only 2 hours of data for each channel was captured, it required three separate nights as Nerpio is having just as much bad weather as we are here in the UK.
  • 12” Planewave Corrected Dall-Kirkham Astrograph.
  • SBIG-STXL-6303E camera
  • Paramount PME mount.
Whilst iTelescope provide calibration frames, this data needed a lot of help as the camera sensor had significant column defects. Fortunately PixInsight has two great scripts for identifying, locating and removing these defects and a bit of clone stamp finished the job.
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