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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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Sunday, September 8, 2013

Bubble Nebula reprocessed


Since my processing technique gets better and weather doesn't give any support, I have reprocessed some older images. There is now star colors added and other processing is tweaked too.

Image is shot with a QHY9 and the Meade LX200 GPS 12" @ f5, pixel scale 0.65pixels/arc second.
Original versions from October 2009, with technical details:
http://astroanarchy.blogspot.com/2009/10/bubble-nebula-finalized.html


Sharpless 162, NGC 7635, the "Bubble Nebula"
Ra 23h 20m 48s Dec +61° 12′ 06″

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Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.This composition is very close to a visual spectrum.


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Image is in mapped colors from the emission of ionized elements, R=Sulfur, G=Hydrogen & B=Oxygen.Star colors are mixed from the NB channels, Red=H-a, G=O-III & B= 85%O-III + 15%H-a.

INFO

This is one of the most interesting looking structures in a sky.
NGC 7635 aka "Bubble Nebula, Sh2-162 or Caldwell11, is a Hydrogen emission nebula in constellation Cassiopeia. It locates near the open cluster M 52 at distance of about 11.000 light years from the Earth.
The bubble structure is created by a strong stellar wind, a radiation pressure, from massive hot magnitude 8,7 central star, SAO 20575, it can be seen in an image inside of the bubble, off centered at Right.
Bubble is an expanding shock front inside a giant molecular cloud and it has a diameter more than Six light years. The spherical formation is expanding at speed of 6500.000 km/h, due the huge scale and distance we can't see the movement easily. In a century, the bubble in this image will be only about one pixel wider, than now! ( ~1 arc second)
Strong UV-radiation from a central star ionized elements in a gas and makes them glow at typical wavelength to each element. (Hydrogen glows Red light as Sulfur, Oxygen emits Green/Blue light at visible wavelengths)

Orientation
A  wider field image of the region, Bubble can be seen at ten a clock position as a bright "pearl".


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Gray circle shows the apparent size of the full Moon.


The Bubble Nebula as an experimental 3D-model


This is a looped video, click to start and stop. Original movie is in HD1080p resolution.
More info about the animation in this blog post:
http://astroanarchy.blogspot.fi/2013/02/3d-study-of-bubble-nebula.html







Thursday, September 5, 2013

IC 443, a supernova remnant reprocessed


There is now added some new data found from my hard drive. Image is now little wider giving a better composition. An older version can be seen here: http://astroanarchy.blogspot.fi/2013/02/ic-443-supernova-remnant-as-closeup.html Not a massive difference but image works now somehow better with some extra space at sides.

I have shot several times this supernova remnant in Gemini. In this image, there are three different exposure sets combined, first from the year 2010 and two others from this season. Total exposure time is now around 20h. Latest images for this target are shot at 11.02 this week, 3h of H-alpha emission.

A Gemini SNR, IC 443, the "Jellyfish Nebula"
Ra 06h 17m 13s   Dec +22° 31′ 05′′

Image is in mapped colors, from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.

INFO

IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a Galactic supernova remnant (SNR) in the constellation Gemini. It locates visually near the star Eta Geminorum at distance of about 5000 light years.

IC 443 may be the remains of a supernova that occurred 3,000 - 30,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds

IC 443 in visual colors


A natural color composition from the emission of ionized elements.
R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15% Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.


Older wide field images of the same target
Click for large images


A study about the apparent scale in the sky
http://astroanarchy.blogspot.fi/2011/07/ic-443-snr-scale-in-sky-zoom-in-series.html

Map of constellation Gemini


Technical details

Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.

Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
Exposures for the H-alpha, emission of ionized Hydrogen = 20h
Narrowband cahnnels for ionized Oxygen and Sulfur are taken from an older wide field image.


A single unprocessed 1200 second frame of H-a emission
This isn't a bright object... 




Tuesday, September 3, 2013

Time and Space Puzzle



I made this just for a fun...




INFO

Image in the puzzle above shows my image of the Bubble nebula in constellation Cassiopeia.


More info about this nebula in this blog post:
http://astroanarchy.blogspot.fi/2011/03/bubble-nebula-reprocessed.html





Friday, August 30, 2013

Wonders of Gemini



The collection

I made a collection out of my images from the constellation Gemini. Pictures are taken between 2007-2013 with different instruments. Closeups are taken with my longer focal length instrument, an old Meade LX200 12" telescope. Wider field images are taken by using two camera lenses, Tokina AT-X 300 f2.8 and Canon EF 200mm f1.8 lens, both full open. All images are shot with QHY9 astronomical camera and the Baader narrowband filter set, H-alpha, Oxygen and Sulfur.

Be sure to click the image to see it in full scale!
Note. a large image, ~5MB and 1900x3200 pixels



Technical data and other information
You will found all the images in this collection from my portfolio, with technical details.

Orientation