Pleiades (Messier 45 or Seven Sisters)

Pleiades (Messier 45 or Seven Sisters)

Constellation: Taurus.
Session: 15 Nov 2018

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In astronomy, the Pleiades (/ˈplaɪədiːz/ or /ˈpliːədiːz/), or Seven Sisters (Messier 45 or M45), is an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky. The celestial entity has several meanings in different cultures and traditions.

The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster (hence the alternative name Maia Nebula after the star Maia), but is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing. Computer simulations have shown that the Pleiades was 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: Wikipedia
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• Optics: Takahashi FSQ-85EDX super apo (quadruplet 85/450).
• Mount: Skywatcher N-EQ6 Pro.
• Filters: Astronomik LRGB (36 mm).
• Accessories: QHYCCD QHYCFW-2-M motorized filter wheel.
• Camera: QHY163M mono.

L: 120x60s | binning 1×1 | Gain 120 | Offset 80 | cooled -20°c.

R: 10x60s | binning 1×1 | Gain 120 | Offset 80 | cooled -20°c.

G: 10x60s | binning 1×1 | Gain 120 | Offset 80 | cooled -20°c.

B: 10x60s | binning 1×1 | Gain 120 | Offset 80 | cooled -20°c.

Integration: 2,5 hours.
Correction: Darks, Flats, Bias

Notes: Mapped LRGB, maybe RGB filters not in focus as well, not polar alignment, moonlight.

Pixinsight, Adobe Photoshop.

© www.infinitalavita.comCristian Cestaro.

Posted by infinitalavita on 2018-11-15 22:00:00

Tagged: , takahashi , Astrofotografia , astrophotography , Cristian Cestaro , www.infinitalavita.com , infinita è la vita , infinite is life , messier 45 , m45 , seven sisters , sette sorelle , pleiadi

The Pleiades (M45)

The Pleiades (M45)

The Pleiades (also known as the Seven Sisters and Messier 45). This is one of my favourite autumn targets and one I feel compelled to image every year in order to try and improve on previous attempts. Their rising heralds the arrival of the constellation of Orion which pursues them. I love the mythology associated with the Pleiades and Orion and different cultures have their own stories to explain them. M45 always seems like it should be a fairly easy object to image and it is, however processing it is another matter. This image was made over two nights (24/09/18 and 03/10/18). The original idea was to capture all the data in one night but the first night, although being very clear, was a full Moon and many of the subs were washed out making processing a nightmare. The second night the Moon wasn’t an issue but conditions were still less than ideal and we were shooting into a murky sky with high cloud. Ultimately I combined the best shots from both nights and this is the result…by no means perfect but as good as I can get it, not too noisy and a reasonable amount of nebulosity coming through.

The Pleiades are an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to 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. A faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster (hence the alternative name Maia Nebula after the star Maia), but is now likely an unrelated foreground 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.

Information courtesy of Wikipedia:
en.wikipedia.org/wiki/Pleiades
en.wikipedia.org/wiki/Pleiades_(Greek_mythology)

060 x 300 second exposures at Unity Gain (139) cooled to -20°C
030 x dark frames
063 x flat frames
100 x bias/offset frames
Binning 1×1

Total integration time = 5 hours

Captured with APT
Guided with PHD2
Polar Alignment with SharpCap Pro
Processed in Nebulosity, Fitsworks, Microsoft ICE and Photoshop

Equipment
Telescope: Sky-Watcher Explorer-150PDS
Mount: Skywatcher EQ5
Guide Scope: Orion 50mm Mini
Guiding Camera: ZWO ASI120MC
Imaging Camera: ZWO ASI1600MC Pro
Baader Mark-III MPCC Coma Corrector
Light pollution filter

Posted by Davide Simonetti on 2018-10-07 11:51:56

Tagged: , Pleiades , Seven Sisters , Messier 45 , Star Clusters , Stars , M45 , Maia , Electra , Taygete , Alcyone , Celaeno , Sterope , Merope , Pleione , Atlas , Astrophotography , Astronomy , Space

Pleiades

Pleiades

The Pleiades (M45). This is a shot I’ve been wanting to do for a long time. Previous attempts were unsatisfactory because my 127 Mak has too much focal length for this object and looked straight through it and using a camera lens made unattractive spokes around the stars caused by the iris of the lens. With the 150mm Newtonian scope the framing is pretty much perfect and plenty of nebulosity can be captured. Also the spikes caused by the secondary mirror spider add to the image. Not perfect perhaps but definitely the best attempt so far. This image has been edited sine originally being posted with extra data added and flat files replaced.

[Wikipedia] In astronomy, the Pleiades, or Seven Sisters (Messier 45 or M45), are an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky.

The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster (hence the alternative name Maia Nebula after the star Maia), but is now known 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.[en.wikipedia.org/wiki/Pleiades]

68 x 75 second exposures at 400 ISO (one hour and 15 minutes integration time).
68 x dark frames
24 x flat frames
21 x bias/offset frames (subtracted from flat frames only)

Captured with APT
Guided with PHD2
Processed in Nebulosity and Photoshop

Equipment:
Sky-Watcher Explorer-150PDS
Skywatcher EQ5 Mount
Orion 50mm Mini Guide Scope
ZWO ASI120 MC imaging and guiding camera
Canon 700D DSLR

Posted by Davide Simonetti on 2017-09-17 20:28:52

Tagged: , Pleiades , Messier 45 , M45 , Seven Sisters , Stars , Space , Astronomy , Astrophotography

M45 Pleades (Relaborated)

M45 Pleades (Relaborated)

Constellation: Taurus.
Session: 08 Dec 2015 , 23:38.

Sorry this photo is taken with fog.

In astronomy, the Pleiades (/ˈplaɪədiːz/ or /ˈpliːədiːz/), or Seven Sisters (Messier 45 or M45), is an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky. The celestial entity has several meanings in different cultures and traditions.

The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster (hence the alternative name Maia Nebula after the star Maia), but is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing. Computer simulations have shown that the Pleiades was 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: en.wikipedia.org/wiki/Pleiades
—————————————————————————————————

SETUP:

Skywatcher Black Diamond, 250/1200 (f4.8) | Newton – EQ6 Pro | Refractor 80/400mm (f/5) | CCD (Orion StarShoot AutoGuider) | Filter: Omegon Filter Light Pollution 2".

DATA:

Canon EOS 550D Reflex camera (not modified).
Lights: 9x120s | ISO 400 | 18 min of integration.
Darks | Flats | Dark Flats | Bias: 11 | 11 | 11 | 11.

Notes: Elaborated again.

DeepSkyStacker | Adobe Photoshop CS6.

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Credits: Cristian Cestaro.

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Posted by infinitalavita on 2015-12-12 15:22:01

Tagged: , m45 , pleiades , pleiadi , seven sisters , sette sorelle , Cristian Cestaro , www.infinitalavita.com , infinitaèlavita , infiniteislife

The Pleiades (M45)

The Pleiades (M45)

The Pleiades, or Seven Sisters (Messier 45 or M45), is an open star cluster approximately 444 light years away from Earth containing middle-aged hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky.

The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster (hence the alternative name Maia Nebula after the star Maia), but is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing. Computer simulations have shown that the Pleiades was 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.

The name of the Pleiades comes from Ancient Greek. It probably derives from plein because of the cluster’s importance in delimiting the sailing season in the Mediterranean Sea: ‘the season of navigation began with their heliacal rising’. However, the name was later mythologised as the name of seven divine sisters, whose name was imagined to derive from that of their mother Pleione, effectively meaning ‘daughters of Pleione’. However, in reality the name of the star-cluster almost certainly came first, and Pleione was invented to explain it. [Wikipedia]

8 x 2 minute exposures at 800 ISO
11 x dark frames
11 x flat frames
24 x bias/offset frames

Equipment
Celestron NexStar 127 SLT
GoTo AltAz mount with homemade wedge
Orion 50mm Mini Guide Scope
ZWO ASI120 MC imagaing and guiding camera
Canon 700D DSLR (piggybacked on scope)
Tamron 70-30mm lens at 300mm

Guided with PHD
Stacked and calibrated in Maxim DL
Post processed in Maxim DL, Nebulosity, and Photoshop

Posted by Davide Simonetti on 2015-08-22 09:23:34

Tagged: , Pleiades , Seven Sisters , Messier 45 , M45 , Star Clusters , Stars , Astrophotography , Astronomy