COPYRIGHT, PLEASE NOTE

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.

Have a visit in my portfolio

Tuesday, January 8, 2013

An emission nebula NGC 1491




A start of the new imaging project.
I'll shoot other two emission channels, needed for a color image, as soon as the weather allows.


NGC 1491
in constellation Perseus

NGC 1491 in H-alpha emission light


INFO

NGC 1491 is an emission nebula found in the constellation of Perseus at the distance of about 10700 light years. The ultraviolet light from the newly born stars makes elements in the nebula glow. There is an an 11th magnitude star in its center.  The solar wind, a radiation pressure, from the central star is blowing a bubble in the gas surrounding it. This is a dim one, seven hours of exposures was barely enough to reveal it.


A closeup

A detail from the center of the image above


A popular shape in our local universe

While processing the image, I noticed a familiar shape in the center portion of the image.
It seems to repeat itself in various targets. My guess is, that it's coursed by the solar wind from the open cluster usually locates in center of the emission nebula of this type.   

A collection of targets with same type of shapes as can be seen in center of the this new image.
The top most two images are from NGC 1491.



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 5Hz
Image Scale, ~0,8 arc-seconds/pixel
21 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 7h



An experimental starless image

A starless image to show only the actual nebula





Wednesday, January 2, 2013

Melotte 15 as an experimental 3D-study



I have done several 3D-studies out of my astronomical images. Models are based on some known scientific facts and an artistic impression. This is an approximation to the real structure of the nebula, an educated guess, it gives a feel to the object and an idea, what it must really be like.

There are several 3D-modes to see from the same material. Animated 3D, free view stereo pairs and an anaglyph Red/Cyan 3D.



An animated 3D-study of Melotte 15
Please, let the animation load to see a smooth movement

Note. A largish file, 6.7MB
There are nothing else used than a real image elements from the original 2D-shot!



An original image used for the 3D-model

The blog post about the Melotte 15, with a technical details, can be seen here:
http://astroanarchy.blogspot.fi/2012/12/melotte-15-in-ic-1805-project-finalized.html


An other version of the animated 3D
An experiment with a zoom effect

Note. A largish file, 6.7MB


Free view stereo pairs
Viewing instructions

For a Parallel Vision method

Click for a large image


For a Cross Vision method

Click for a large image



An anaglyph Red/Cyan 3D
Pair of Red/Cyan eyeglasses are needed to see this 3d-image!
(Red and Blue filters will do the trick, red goes to left eye.)

Click for a large image



Ps.

All my 3D-studies, stereo pairs and an anaglyph 3D, can be found here:

Animated versions are here:




Astro Anarchy gets published, a public Slide Show




My works are selected as a public content for a pedestrian zone in my home town Oulu, Finland.
There is a very large display unit at the end of the zone, 5.12 x 3.2 meters (over 16 x 10 feet). Five different sets of my astronomical photographs are running there as a slide show at January 2013.

Astronomical images in a giant public display
January 2013


All my images can be seen in my portfolio, please have a look:
http://astroanarchy.zenfolio.com/


Tuesday, January 1, 2013

Autumn season 2012 images in 54 seconds, the movie



I made a short still motion movie out of my astronomical images from the Autumn season 2012.


The Movie
Autumn season 2012


Click to play

All my astronomical images are in the portfolio, please have a look:
http://astroanarchy.zenfolio.com/

You are welcome to follow my work in Facebook:
https://www.facebook.com/jp.metsavainio