The Pleiades
also known as the Seven Sisters and Messier 45, are an open star
cluster containing middle-aged, hot B-type stars located in the
constellation of Taurus. It is among the
star clusters nearest Earth and is the cluster most obvious to the
naked eye in the night sky.
The cluster is dominated by hot blue and luminous stars that have formed within the last 100 million years. Reflection nebulae around the brightest stars were once thought to be left over material from the formation of the cluster, but are now considered likely to be an unrelated dust cloud in the interstellar medium through which the stars are currently passing.
Computer simulations have shown that the Pleiades were probably
formed from a compact configuration that resembled the Orion Nebula.
Astronomers estimate that the cluster will survive for about another
250 million years, after which it will disperse due to gravitational
interactions with its galactic neighborhood.
Source:
https://en.wikipedia.org/wiki/Pleiades
Experimenting,
collecting
experience and learning software for assembling and processing
astrophotographic photos, brings results. The material for this photo
comes from four different photo sessions, taken at different times
during 2019.
Different frames, different exposure times, different sensitivity.
One session was
without Flat calibration frames, which additionally made it difficult
to put everything together. However, APP is my friend and after a few
test I’ve taken,
I understood and learned how to compose such sessions. After joining
all the sessions together, I saw that
basically I did
a little mosaic. The source material was
not of good quality as shown in the photo. This
maximum I could gain from it. I have to plan
a new pleiades
photo session with the
new, target equipment I have now.
Equipment: Canon EOS 6D (no mod.), SkyWatcher Newton 1000/200 [mm] F5, coma corrector, NEQ6Pro modification.
- Composition: Astro Pixel Processor,
- Processing: RT + GIMP + plug-ins (Linux),
- Total exposure time minus defective lights: 5h56 min. ISO 1600 + 1000
- Calibration frames (one missing session): Flat, DarkFlat, Bias
