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Melotte 15 Hubble Palette | by Cristiano Secci
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Melotte 15 Hubble Palette

Melotte 15 is an open cluster of bright stars located at the center of the Heart Nebula (IC 1805). Named for its discoverer, Philibert Jacques Melotte (1880-1961), the grouping of O-type supergiants is only about 1.5 million years old. "O" stars are the brightest and most massive known, about 20 to 100 times larger than the Sun! The lifespan of these hot, blue stars can be as short as 3-6 million years. Melotte 15 is about 7,500 light years away from Earth.

 

Technical Data:

OTA: SkyWatcher Newton 200mm F/5

Mount: iOptron CEM60

Camera: ZWO ASI 1600 MM-C, cooled at -20C

Guide Camera: QHY-5LII Mono

Guide Scope: ArteSky 60mm F/4

Filters: Optolong Ha, OIII, SII

Baader Coma Corrector MPCIII

Software: Sequence Generator Pro, PHD2, Deep Sky Stacker, PS

 

56 frames in total, Gain 300 - Offset 21

Ha 20x120s + 4x300s (60m)

OIII 16x120s (32m)

SII 16x120s (32m)

Total Integration Time: 2 hour, 4 minutes

15 Bias

11 Darks

No Flats

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Uploaded on November 19, 2018