The Pacman Nebula
A cosmic cloud
Look through the cosmic cloud cataloged as NGC 281 and you might miss the stars of open cluster IC 1590. Still, formed within the nebula that cluster’s young, massive stars ultimately power the pervasive nebular glow. The eye-catching shapes looming in this portrait of NGC 281 are sculpted dusty columns and dense Bok globules seen in silhouette, eroded by intense, energetic winds and radiation from the hot cluster stars. If they survive long enough, the dusty structures could also be sites of future star formation. Playfully called the Pacman Nebula because of its overall shape, NGC 281 is about 10,000 light-years away in the constellation Cassiopeia. This sharp composite image was made through narrow-band filters with the addition of true color stars. It combines emission from the nebula’s hydrogen, oxygen and sulfur atoms to synthesize red, green, and blue colors. The scene spans well over 80 light-years at the estimated distance of NGC 281.
The Pacman Nebula in Cassiopeia
|Imaging telescopes||Celestron Rowe-Ackermann Schmidt Astrograph 11″|
|Guiding||Guidescope 130mm, ZWO ASI 290MM|
|Filter||Baader 3.5 / 4nm f/2 Ultra-Highspeed-Filter-Set 50mm² (H-alpha / O-III / S-II), Baader R, G, B (50mm²)|
|Accessories||Baader UFC, Baader UFC-Tilter, Celestron Focus Motor for SCT|
|Integration||60.5 hours, H-Alpha: 620×120″, OIII: 590×120″, SII: 515×120″, RGB each: 120×30″|
|Dates of recording||19 nights between July 2022 and September 2022|
NGC 281 PRINT
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