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Wednesday, April 1, 2020

Two ways to go in a same field of view, planetary nebula Sh2-216 & supernova remnant Sh2-221


I have reprocessed this photo from March 1 2020, now the composition is more dynamic and colors are more vivid. Original photo can be seen here, https://astroanarchy.blogspot.com/2020/03/two-ways-to-die-sh2-216-sh2-221.html

This must be one of the dimmest targets I have shot. The supernova remnant Simeis 147 is large and dim but this nebula pair in Auriga is much dimmer. There are very few images about this target around. Photo is taken with Tokina AT-x 300mm f2.8 camera lens and Apogee Alta U16 astro camera.

Supernova remnant and a planetary nebula in the same field of view
Click for a large photo, it's worth it!

Mapped colors from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Image spans about six degrees vertically!


Photo in visual spectrum
Click for a large photo
The red glow from an ionized hydrogen (H-alpha) is dominating the view, bluish hues are from an ionized oxygen (O-III)

H-alpha image
Click for a large photo

This grayscale image shows only the light emitted by an ionized hydrogen.


INFO

Sh2-216, the closest planetary nebula to earth ever discovered.

Image spans about six degrees horizontally, at left lays the large and very dim planetary nebula Sharpless 216 (aka Simeis 288, Marsalkova 44, LBN 742, GN 04.41.3)
This planetary nebula is the closest known planetary nebula to Earth, about 390 light years, and also one of the oldest known. Due the old age, it's very diffused, dim and large, apparent diameter is about 1,6 degrees. (Full Moon is about 0,5 degrees wide)

Supernova remnant Sh2-221

At right side of the photo lays a dim nad diffused supernova remnant Sh2-221 (SNR G160.4+02.8, HB9) it locates in constellation Auriga, about one degree West from star Capella. (Doesn't show in my image) The distance from the Earth, 2600 light years, is determined recently at 2007. This object was recognized as a supernova remnant back at seventies.
Technical details

Processing workflow

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
Tokina AT-x f2.8 camera lens

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and an old spotting scope of Meade LX200


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

Total exposure time 26h

H-alpha, 36 x 1200 s, binned 1x1 = 12 h
O-III, 33 x 1200 s, binned 2x2 = 11 h
S-II, 9 x 1200 s. binned 2x2 = 3 h



Orientation in Auriga



An experimental starless image
Click for a large photo


www.tips-fb.com Posted by J-P Metsavainio at 2:31 PM 0 comments
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Tuesday, March 31, 2020

From Cassiopeia to Cepheus


This spring season I have shot wider field images with 300 mm f2.8 camera optics. Here are couple of panoramic mosaic images made by overlapping photos.

I do many of my mosaic images by shooting individual artworks pre planned so, that after few years I have overlapping photos from most of the area. Then I do some additional shots to fill the gaps.
My workflow is so constant, that very little or none tweaking is needed when it's time to joint the pieces together.


From CTB1 to Cave nebula
Click for a large mage, it's worth it!

CTB1 supernova remnant at upper left, Cave Nebula at upper right. Image is in mapped colors from a light from the ionized elements, hydrogen = green, sulfur = red and oxygen = blue.
Link to CTB1 image, https://astroanarchy.blogspot.com/2020/02/ctb1-supernova-remnant-in-cassiopeia.html Link to Cave Nebula area photo, https://astroanarchy.blogspot.com/2020/03/from-bubble-to-cave-round-ii.html
Even wider view
Click for a large mage
From Cassiopeia to Cepheus
Unfinished mosaic with Cederblad 214 (The Cosmic Question Mark)
Click for a large mage



CTB1 (Abell 85)
Please, click for a large image, it's worth it.

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


An older longer focal length image back from 2016
Please, click for a large image


Mosaic in visual colors






Large mosaic photograph, shot between 2014 - 2020, 160h
Click for a large mage





www.tips-fb.com Posted by J-P Metsavainio at 11:22 AM 0 comments
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Monday, March 30, 2020

IC 63 and NGC 281


I shot data for this image few weeks ago at 7.3.2020.  little over two hours for H-alpha light and only 20 min for both O-III and S-III. Beside that I took colors from my older longer focal length images of NGC 281 and IC 63. There is a reflection nebula component in IC 63 but in this narrowband image the blueish hueas are from an ionized oxygen, O-III.


IC 63 & NGC 281 
Click for a large image

Image is an visual colors from light of an ionized elements, hydrogen, sulfur and oxygen.

Orientation in Cassiopeia
Click for a large image
Older longer focal length photos 
IC 63
Click for a large image

Image details, https://astroanarchy.blogspot.com/2017/01/the-ghost-of-christmas-past-ic-63.html

 NGC 281
Click for a large image
Image details, https://astroanarchy.blogspot.com/2014/11/ngc-281-siamese-fighting-fish.html
www.tips-fb.com Posted by J-P Metsavainio at 12:00 PM 0 comments
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Saturday, March 28, 2020

The rise of Phoenixes, From Bubble to Cave Nebula


I have published this image in mapped colors couple of weeks ago, it can be seen here, https://astroanarchy.blogspot.com/2020/03/from-bubble-to-cave-round-ii.html

This time I'll like to show this beautiful area near Cassiopeia in visual spectrum. Ionized hydrogen (H-alpha) glows deep red light. Bluish hues are from an ionized oxygen.

From Bubble to Cave Nebula
Click for a large image,

Image is in visual colors composed from narrowband channels. Red light from an ionized hydrogen is dominating the view. Object at lower left is known asharpless 157, at lower center lays the Bubble Nebula, it can be seen as a tiny red pearl in his vide field image. The bluish are at upper right ist the Cave Nebula.
Sharpless 157, a Zoom Out Series
Click for a large image, NOTE, 4500 x 1024 pixels!

I made a Zoom out serie about Sharpless 157. It's a complex region near the famous Bubble nebula and it's kind of large. There are not too many photos of it around. I have marked the apparent size of the full Moon in each image. The angular size of a Moon is about 0,5 degrees, that's 30 arc minutes.
This kind of image gives an idea, how complex and fractal the gas structures can be. there are endless amount of variations and new details at every zoom level and beyond. 

Technical details
The vertical image is taken with Tokina AT-x camera optics, Apogee Alta U16 astrocamera and Astrodon narrowband filter set. Info about my imaging system can be seen here,
 https://astroanarchy.blogspot.com/2020/01/the-frankenstein-monster-my-current.html
Some older parts of the photo are taken back in 2014 with QHY9 astrocam, Baader narrowband filters and Canon EF 200mm f1.8 camera lens.

Photo is taken from downtown Oulu, Finland. Due to an extensive light pollution I can do only narrowband imaging in my location. 
Total exposure time is around 20 hours.



www.tips-fb.com Posted by J-P Metsavainio at 11:30 AM 0 comments
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