8"/f4 Newton Teleskop - Fotogalerie Astrostammtisch Heiligkreuz

Galerie > Galaxien > NGC7331, Galaxie > 8"/f4 Newton Teleskop

8"/f4 Newton Teleskop

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NGC 7331 - StephansquintettHallo Leute!

Ich hatte zunächst große Schwierigkeiten mit der Bearbeitung, erreichte allerdings nach dem 4. "Anlauf" ein passables Resultat.
Ich sammelte die Frames in der Nacht vom 8. auf den 9. September, hatte also (leider) mit abnehmendem Halbmond zu kämpfen, der schon um etwa 1 beinahe den gesamten Himmel ausleuchtete. Probleme hatte ich durch den Lichteinfall des Halbmondes in den Sucher auch mit dem Guiding, den Gradienten konnte ich einigermaßen gut korrigieren (Dynamic Background Extraction).

Zum Objekt:

Die Galaxie NGC 7331 wurde am 5. September 1784 von dem deutsch-britischen Astronomen Wilhelm Herschel entdeckt und liegt in einer Entfernung von etwa 40 Millionen Lichtjahren. Sie ähnelt in vielen Bereichen unserer eigenen Galaxie, weshalb sie auch "MIlky Way's Twin" genannt wird.

Das Stephans Quintett ist eine Gruppe von fünf Galaxien im Sternbild Pegasus, die am 22. September 1877 von dem französischen Astronom Édouard Jean-Marie Stephan entdeckt wurde.
Die Galaxien NGC 7317 bis NGC 7319 bilden ein räumlich enges, wechselwirkendes System in etwa 300 Millionen Lichtjahren Entfernung. Aufgrund der gegenseitigen Gravitationswirkung sind die Spiralarme der Galaxien unregelmäßig verformt.simon

NGC7331 und Stephans Quintett Erstes Ergebnis einer Nacht (12. August 2015). Um mehr Tiefe zu erlangen, muss ich da noch ein oder zwei Nächte investieren. rainium

NGC7331, Stephans QuintettEin eher überraschendes Wolkenloch brachte mich am Freitag ziemlich in Stress: Um 22h hats noch auf die Pergola getröpfelt, um 23:30 beim Heimgehen vom Nachbarschaftsplausch war keine Wolke am Himmel. Trotz ungünstiger Wolkananimation schmiss ich schnell den 10" auf die Montierung und konnte so bei sehr guter Durchsicht 3h20 Daten sammeln. NGC7331 ist eine recht helle Galaxie, bekannter ist allerdings das Stephan's Quintett, eine Ansammlung von 5 Galaxien am oberen Bildrand.martin

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