The Bubble Nebula (NGC 7635) in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot 7.8 magnitude young central star. M52, also known as NGC 7654 or the Scorpion Cluster, is an open cluster of stars (here, above and to the left of the Bubble Nebula). It was discovered by Charles Messier in 1774.

Total image time was 10 hours.

Exposure	30x20 min.
Gain	100
Camera	ToupTek ATR2600C [6224 x 4168]
Optics	120mm Skywatcher Esprit on a Proxisky UMi20S Strain Wave mount
Guiding	ToupTek GPM462M using Phd2 with a 400mm guide scope. Average 20 min sub GuideRMS ranged from 0.4 to 0.6 using 0.5 sec exposures.
Controller	Kstars on MeLe Quieter 4C
Filter	Triad Quad Ultra
Location	Lower Sackville, Nova Scotia.
Date	2025-09-15 - 2025-09-16
Processing	Processed in PixInsight.
PixInsight Processing	WeightedBatchPreprocessing Script BlurXTerminator GraXpert SpectrophotometricColour Calibration NoiseXTerminator StarXTerminator Generalized Hyperbolic Stretch on both the stars and starless images HDRMultiScaleTransform on Starless PixelMath to recombine the images

Date: September 17, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC7635-M52_20x30-copy.jpg Wed, 17 Sep 2025 17:31:45 -0300 https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC7635-M52.jpg Click on the image to view it at full resolution,
then click again for actual size.

The Bubble Nebula (NGC 7635) in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot 7.8 magnitude young central star. M52, also known as NGC 7654 or the Scorpion Cluster, is an open cluster of stars (here, above and to the left of the Bubble Nebula). It was discovered by Charles Messier in 1774.

Total image time was 6 hours.

Exposure	18x20 min.
Gain	100
Camera	ToupTek ATR2600C [6224 x 4168]
Optics	120mm Skywatcher Esprit on a Proxisky UMi20S Strain Wave mount
Guiding	ToupTek GPM462M using Phd2 with a 400mm guide scope. Average 20 min sub GuideRMS ranged from 0.4 to 0.6 using 0.5 sec exposures.
Controller	Kstars on MeLe Quieter 4C
Filter	Triad Quad Ultra
Location	Lower Sackville, Nova Scotia.
Date	2025-09-15
Processing	Processed in PixInsight.
PixInsight Processing	WeightedBatchPreprocessing Script BlurXTerminator GraXpert SpectrophotometricColour Calibration NoiseXTerminator StarXTerminator Generalized Hyperbolic Stretch on both the stars and starless images HDRMultiScaleTransform on Starless PixelMath to recombine the images

Date: September 16, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC7635-M52.jpg Tue, 16 Sep 2025 13:06:18 -0300 https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC-7635-Bubble-Nebula.jpg
The Bubble Nebula (NGC 7635) in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot 7.8 magnitude young central star.

Total image time was 45 minutes.

Exposure	2x20 + 5x5 min.
Gain	100
Camera	ToupTek ATR2600C [6224 x 4168]
Optics	120mm Skywatcher Esprit on a Proxisky UMi20S Strain Wave mount
Guiding	ToupTek GPM462M using Phd2 with a 400mm guide scope
Controller	Kstars on MeLe Quieter 4C
Filter	Triad Quad Ultra
Location	Lower Sackville, Nova Scotia.
Date	2025-09-14
Processing	Processed in PixInsight.

Date: September 15, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC-7635-Bubble-Nebula.jpg Mon, 15 Sep 2025 11:08:57 -0300 https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=masterLight_BIN_1_8256x5504_EXPOSURE_1200_00s_FILTER_LPR_combined_RGB_BXT-topaz-denoise-sharpen-2.jpeg
The Bubble Nebula (NGC 7635) in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot 7.8 magnitude young central star. This image includes the bright nebula NGC 7538 at the top, and NGC 7510 to its right. M52 (NGC 7654) is at the bottom left. I haven't been able to find a name for the nebulosity on the right hand side of this image. [Edit - the Lobster Claw Nebula SH2-157 is nebula on the right side of the image]

Total image time was 8 hours.

Exposure	24x20 min.
ISO	800
Camera	Nikon Z7 [8856 x 5504]
Optics	120mm Skywatcher Esprit on a Celestron CGX mount
Guiding	ZWO ASI224MC using Phd2
Controller	Kstars on Odroid-N2
Filter	Triad Quad Ultra
Location	Lower Sackville, Nova Scotia.
Date	2019-09-07
Processing	Processed in PixInsight and Lightroom and Topaz Photo AI.

Date: March 26, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=masterLight_BIN_1_8256x5504_EXPOSURE_1200_00s_FILTER_LPR_combined_RGB_BXT-topaz-denoise-sharpen-2.jpeg Wed, 26 Mar 2025 17:50:04 -0300 https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC_7635-Bubble-Nebula.jpg The Bubble Nebula (NGC 7635) in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot 7.8 magnitude young central star. This image includes the bright nebula NGC 7538 at the top, and NGC 7510 to its right. M52 (NGC 7654) is at the bottom left. I haven't been able to find a name for the nebulosity on the right hand side of this image. [Edit - the Lobster Claw Nebula SH2-157 is nebula on the right side of the image]

Total image time was 8 hours.

Exposure	24x20 min.
ISO	800
Camera	Nikon Z7 [8856 x 5504]
Optics	120mm Skywatcher Esprit on a Celestron CGX mount
Guiding	ZWO ASI224MC using Phd2
Controller	Kstars on Odroid-N2
Filter	Triad Quad Ultra
Location	Lower Sackville, Nova Scotia.
Date	2019-09-07
Processing	Processed in PixInsight and Lightroom.

Date: March 26, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC_7635-Bubble-Nebula.jpg Wed, 26 Mar 2025 17:50:04 -0300 https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC_7635.jpg The Bubble Nebula (NGC 7635) in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot 7.8 magnitude young central star.

Exposure	19x10 min.
ISO	1250
Camera	Nikon Z7 [8856 x 5504]
Optics	10” Meade SCT on a Celestron CGEM DX mount
Guiding	ZWO ASI224MC using Phd2
Controller	Kstars on Odroid-N2
Filter	None
Location	St. Croix Observatory, Nova Scotia.
Date	2019-10-21
Processing	Processed in PixInsight and Lightroom.

Date: March 26, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/Buble-Nebula-NGC-7635&image=NGC_7635.jpg Wed, 08 Jul 2020 15:46:02 -0300