Friday, February 17, 2012
The California Nebula, NGC 1499, with some new data
I shot about 5h new H-a data for the NGC 1499 in this Autumn, 2011, with Canon EF 200mm f1.8, full open, and a QHY9 cooled astronomical camera. All the exposures, I have taken for this object bettween years 2008-2011, are now used. Total exposure time is over 26h together for all three channels, Ionized Sulfur, Hydrogen and Oxygen. Two camera lenses was used to capture the data, a Tokina AT 300mm f2.8 and a Canon EF 200mm f1.8, both was used at full aperture. An extra detail, at bright central area, is shot with a longer focal length instrument, Meade LX200 GPS 12" at f5. Exposure time for central detail was about 10h, at top of the total 26h exposure time.
NGC 1499, in Perseus
Ra 04h 03m 18s Dec +36° 25′ 18″
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.
The California Nebula is an emission area located in constellation Perseus. It appears to resemble outlines of State of California on long exposure photographs, like this one. It has a very low surface brightness and it's very difficult to observe visually. Distance from my home town Oulu, Finland, is about 1000 light years.
this image spans about five degrees. The Wikipedia article states, that the angular size is about 2,5 degrees (Five full Moons side by side) but as can be seen in this image, the actual size, with a dim outer parts, is much large.
this image spans about five degrees. The Wikipedia article states, that the angular size is about 2,5 degrees (Five full Moons side by side) but as can be seen in this image, the actual size, with a dim outer parts, is much large.
HST-palette, (HST=Hubble Space Telescope) from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen.
A study about the apparent scale in a sky
This is a large object, note, the size of the Moon is marked, as a scale, in all of the images above.
3D-studies
Experimental 3D-studies of NGC1499 can be found in my portfolio, in different formats.
Please, have a look here:
A panorama mosaic, from IC 1396 to Sh2-129, finalized
A two frame mosaic, from IC 1396 to the Sh2-129
In constellation Cepheus
Note. The dark vertical patch, at middle of the image, is not a seam but a dark nebula. Seam between image halves is located right from the dark nebula and can not be seen.
EDIT.
Image is updated 21.02., I found more material for outer parts. Now the composition is more "spacey".
EDIT.
Image is updated 21.02., I found more material for outer parts. Now the composition is more "spacey".
Last Autumn I shot six hours for new H-alpha light for both objects, IC 1396 & Sharpless 129.
I combined this new data, shot for the mosaic, to all my older material from years 2008, 2009, 2010, 2011 and 2012. The final composition has a total exposure time of about 40h for all channels.
Data is shot with various optics, Canon EF 200mm f1.8, Tokina AT-X 300mm f2.8 and LX200 GPS 12" f5. QHY9 and QHY8 cameras are used with a Baader narrowband filter set, Ha, O-III and S-II.
Image spans about ten degrees horizontally. (Twenty full Moons side by side)
I was about to made more dynamic composition out of this. The weather up here didn't support the shooting of the required four mosaic frames. Now the composition is more "informative", than beautiful...
I was about to made more dynamic composition out of this. The weather up here didn't support the shooting of the required four mosaic frames. Now the composition is more "informative", than beautiful...
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.
Ps.
A study about the scale in a sky
Note. Size of the full Moon is marked as a scale.
(Moon has an apparent diameter of 30', that's 0,5 degrees.)
Sunday, February 12, 2012
AstroAnarchy gets published
![[nasa-large.jpg]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnPTKmnidt6gHuVkChO_MPYTqp2lSu-Tr0If3ey1qfJxF9BJpDhG8wIWnxo86hb3vT5OYKiznVUminjBaRRat99o70A1ODvDjHEDHpKGWYCsnjn-WFYunaGVPsfXiizriH0upX9hbpNWs/s1600/nasa-large.jpg)
At Fridays APOD, Feb. 10. 2012, NASA writers used my experimental 3D-stereo pair of NGC 6752 as a reference.
Link to this APOD: http://apod.nasa.gov/apod/ap120210.html
My stereo pair from the same object is as a text link , "stars in a sphere", in an APOD above.
Saturday, February 11, 2012
Ced 214 as a 3D stereo pair
Ones again, I have done my 3D-experiments with astronomical images.
Viewing instructions can be seen here:
http://www.astroanarchy.blogspot.com/search/label/Stereo%20image%20viewing%20instructions
Other 3D-formats:
Original 2D:
NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
Subscribe to:
Posts (Atom)
