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All the material on this website is copyrighted to J-P Metsavainio, if not otherwise stated. Any content on this website may not be reproduced without the author’s permission.

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Tuesday, October 9, 2018

Astro Anarchy get published, a new exhibition in Oulu, Finland




A new exhibition in Oulu, Finland! Lots of my new photos as a large size Diasec prints.




More Info, please have a look, ( Finnish )




Wednesday, October 3, 2018

First light for the Autumn season 2018, Filaments of the Western Cygnus



After a long mandatory Summer pause, due to high latitude, I managed to have my first light for this season! My first target locates in Western part of the Cygnus nebula complex. This area is not commonly imaged due to close proximity of more famous and brighter target in Cygnus.

As usually, this single image is a start of the longer imaging projet. My purpose is to make a four panel mosaic out of this area.


Filaments of the Western Cygnus
Please, click for a large image

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. The photo width is about one degree of sky. (The full Moon covers about 0,5 degrees of sky.)


Photo in visual palette
Please, click for a large image

Image is in Natural color palette from the emission of ionized elements, R=Hydrogen + Sulphur, G=Oxygen and B=Oxygen + 10% Hydrogen to compensate the missing H-beta emission.


Orientation in Cygnus

The area of interest is marked as a white rectangle 


Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL

Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III

Exposure times

H-alpha, 12 x 1200 s, binned 2x2 = 4 h
O-III, 9 x 1200 s, binned 4x4 = 3 h.
S-II, 9 x 1200 s. binned 4x4 = 3 h
Total 10 h.





Tuesday, February 6, 2018

Sharpless 157 in Cassiopeia, project continues



Few weeks ago I published a new photo of Sharpless 157, it can be seen HERE. We had one of
the rare clear nights at last Sunday night. I managed to get just enough exposures to add a second  frame to this two frame mosaic image of Sh2-157.


Sharpless 157 (Sh2-157)
Please, click for a large image

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. The photo width is about one degree of sky. (The full Moon covers about 0,5 degrees of sky.)


An experimental starless version
Please, click for a large image




A closeup
Please, click for a large image

Detail from  middle right


INFO

Sharpless 157

The night sky between the constellations Cassiopeia and Cepheus is rich with nebulae and star clusters. The nebulae visible in this image include Sharpless 157 and Lynd’s Bright Nebula 537. The star clusters include Markarian 50 and NGC 7510. The planetary Nebula PLN 110-0.1 (WeSb) can be seen at lower left.

Sharpless 157 is sometimes referred to as the Lobster Claw Nebula for obvious reasons. The bright spot at upper left quarter of this photo is Lynd’s Bright Nebula (LBN) 537. Also designated at Sh 2 – 157a, it is a ring nebula around the Wolf-Rayet star WR 157.

At the lower right quarter of the image lays open star cluster NGC 7510.


With labels
Please, click for a large image



An older wide field photo of the area
Please, click for a large image

The area of a new photo is marked as a white rectangle. The Bubble nebula can be seen as a bluish pearl, just half a degree North West from the Sharpless 157. 
This photo is shot at 2007 with a QHY 8 astrocamera and the Baader narrowband filter set, H-a, S-II and O-III


Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL

Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III

Exposure times

H-alpha, 24 x 1200 s, binned 2x2 = 8 h
O-III, 10 x 1200 s, binned 4x4 = 3 h 20 min.
S-II, 9 x 1200 s. binned 4x4 = 3 h
Total 14 h 20 min


A single uncropped, calibrated and stretched 20 min. exposures as they come out from the camera.

H-alpha



S-II




O-III





Sharpless 157, project continues



The weather conditions up here 65N has been worst in ten years astro photographyvise