Tuesday, September 7, 2021

NGC 7129 and NGC 7142

 


This wide-field telescopic image looks toward the constellation Cepheus and an intriguing visual pairing of dusty reflection nebula NGC 7129 (right) and open star cluster NGC 7142. The two appear separated by only half a degree on the sky, but they actually lie at quite different distances. In the foreground, dusty nebula NGC 7129 is about 3,000 light-years distant, while open cluster NGC 7142 is likely over 6,000 light-years away. In fact, pervasive and clumpy foreground dust clouds in this region redden the light from NGC 7142, complicating astronomical explorations of the cluster. Still, NGC 7142 is thought to be an older open star cluster, while the bright stars embedded in NGC 7129 are perhaps a few million years young. The telltale reddish crescent shapes around NGC 7129 are associated with energetic jets streaming away from newborn stars.


Optics: Vixen ED81s @ f/5.2
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: L,R,G,B
CCD Temperature: 0 degrees Celsius
Constellation: Cepheus
Date: August 7-8, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x600 min bin 1x1
R=12x300 min bin 1x1
G=12x300 min bin 1x1
B=12x300 min bin 1x1
Calibration: Darks, Flats, Bias

Monday, September 6, 2021

Sh2-155 (cave nebula)

 





Sh2-155, informally known as the "cave nebula," is dark cloud of gas embedded in a giant emission nebula. The top edge of the cloud is illuminated by several hot, massive (OB) stars that are part of the Cepheus OB3 association. The image was generated with observations in Hydrogen alpha (red), Luminance, Red, Green, Blue filters, from a light polluted sky in Korinthos Greece.

Technical details:


Optics: Vixen ED81s @ f/5.2
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: Ha,L,R,G,B
CCD Temperature: 0 degrees Celsius
Constellation: Cepheus
Date: August 1-3, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x600 min bin 1x1
R=12x300 min bin 1x1
G=12x300 min bin 1x1
B=12x300 min bin 1x1
Ha=18x1200 min bin 1x1
Calibration: Darks, Flats, Bias


Wednesday, September 1, 2021

Sh2-115

 


Sharpless 115 stands just north and west of Deneb, the alpha star of Cygnus the Swan in planet Earth's skies. Noted in the 1959 catalog by astronomer Stewart Sharpless (as Sh2-115) the faint but lovely emission nebula lies along the edge of one of the outer Milky Way's giant molecular clouds, about 7,500 light-years away. Shining with the light of ionized atoms of hydrogen, sulfur, and oxygen, the nebular glow is powered by hot stars in star cluster Berkeley 90. The cluster stars are likely only 100 million years old or so and are still embedded in Sharpless 115. But the stars' strong winds and radiation have cleared away much of their dusty, natal cloud. At the emission nebula's estimated distance, this cosmic close-up spans just under 100 light-years.

Technical details:


Optics: Vixen ED81s @ f/5.2
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: Ha,L,R,G,B
CCD Temperature: 0 degrees Celsius
Constellation: Cygnus
Date: August 11-13, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x600 min bin 1x1
R=12x300 min bin 1x1
G=12x300 min bin 1x1
B=12x300 min bin 1x1
Ha=18x1200 min bin 1x1
Calibration: Darks, Flats, Bias

Monday, August 30, 2021

The Propeller Nebula - Simeis 57




DWB 111 or Simeis 57, also known as the Propeller nebula is an emission nebula in the Cygnus constellation. The distance from Earth is unknown but it is only a small part of a larger emission nebula.

Technical details:

Optics: Vixen ED81s @ f/5.2
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: Ha,L,R,G,B
CCD Temperature: 0 degrees Celsius
Constellation: Cygnus
Date: August 4-6, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x600 min bin 1x1
R=12x300 min bin 1x1
G=12x300 min bin 1x1
B=12x300 min bin 1x1
Ha=18x1200 min bin 1x1
Calibration: Darks, Flats, Bias



Wednesday, August 18, 2021

The Muscleman Cluster: Stock 2 Open Cluster in Cassiopeia

 


Stock 2 (OCL 348, Lund 71 and the Muscleman Cluster) is a class I 2 m open cluster of 54 stars in Cassiopeia. This is one of 24 open clusters compiled by Jurgen Stock in the 1950s. A full list can be found here - http://www.deepskypedia.com/wiki/List:Stock.


Technical details:

Optics: Vixen ED81s @ f/5.2
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: Ha,L,R,G,B
CCD Temperature: 0 degrees Celsius
Constellation: Cassiopeia
Date: August 3-4, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x600 min bin 1x1
R=12x300 min bin 1x1
G=12x300 min bin 1x1
B=12x300 min bin 1x1
Calibration: Darks, Flats, Bias



Tuesday, August 17, 2021

NGC 6960 Western Veil Nebula: The Witch's Broom

 





Ten thousand years ago, before the dawn of recorded human history, a new light would have suddenly have appeared in the night sky and faded after a few weeks. Today we know this light was from a supernova, or exploding star, and record the expanding debris cloud as the Veil Nebula, a supernova remnant. This sharp telescopic view is centered on a western segment of the Veil Nebula cataloged as NGC 6960 but less formally known as the Witch's Broom Nebula. Blasted out in the cataclysmic explosion, the interstellar shock wave plows through space sweeping up and exciting interstellar material. The complete supernova remnant lies about 1400 light-years away towards the constellation Cygnus. This Witch's Broom actually spans about 35 light-years. The bright star in the frame is 52 Cygni, visible with the unaided eye from a dark location but unrelated to the ancient supernova remnant.

Technical details:

Optics: Vixen ED81s @ f/5.2
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: Ha,L,R,G,B
CCD Temperature: 0 degrees Celsius
Constellation: Cygnus
Date: August 14-15, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x600 min bin 1x1
R=12x300 min bin 1x1
G=12x300 min bin 1x1
B=12x300 min bin 1x1
Ha=18x1200 min bin 1x1
Calibration: Darks, Flats, Bias

Friday, July 30, 2021

Ngc 6826 - Blinking Planetary Nebula

 


W. HERSCHEL: [Observed 6 September 1793] A bright point, a little extended, like two points close to one another; as bright as a star of the 8.9 magnitude, surrounded by a very bright milky nebulosity suddenly terminated, having the appearance of a planetary nebula with a lucid center; the border however is not very well defined. It is perfectly round, and I suppose about half a minute in diameter. It is of a middle species, between the planetary nebulae and nebulous stars, and is a beautiful phenomenon. (Η IV-73)
~ The Caldwell Objects, Stephen James O''Meara



Technical details:

Optics: Vixen VC200L @ f/6.4
Mount: Skywatcher HEQ5 Synscan Pro (belt mod)
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: L
CCD Temperature: 0 degrees Celsius
Constellation: Cygnus
Date: Jul 18, 2021
Location: Korinthos - Greece - Albireo Observatory 1
Exposure:
L=12x300 sec bin 1x1
Calibration: Darks, Flats, Bias
Software:
Capturing/Calibration/Stacking: MaximDL
Processing: Pixinsight