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Tuesday, September 21, 2021

Supernova Remnant Simeis 147, new data added

 I have made a new version of my NASA APOD and National Geographic Image of the Week photo. Simeis 147 is a large and very dim supernova remnant in constellation Taurus.

I combined an old data with a new data, with different optics and camera, together.
As a result I have more details, vivid colors and better overall signal in the new photo. An
older photo is from 2011 and the new photo from 2020. Total exposure time in this new composition is over 45 hours.

Simeis 147 SNR
Click for a large image, 1700 x 1200 pixels

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

An Experimental Starless Version

Actual filaments of the supernova remnant can be seen better in this starless version.

A Closeup

Photo in Visual palette


Simeis 147 (sharpless 240), is a very faint and large supernova remnant in constellation Taurus at distance of ~3000 light years. It's constantly expanding at speed of 1000 km/second but due the size of it, we can't see any movement in it. This SN spans over 160 light years and the apparent scale in the sky is about three degrees (Moon has an apparent size of 30" = 0,5 degrees).  Explosion took place approximately 30.000 years ago  and left behind a  pulsar (Neutron star). The pulsar has recently identified.

How long it'll takes to this supernova remnant to expand 1% large when the diameter is 160 light years and it expands at speed of 1000 km/second.
Answer is ~480 years.
 (1% of diameter 160/100= 16, as kilometers ~151.372.800.000.00, = Y, km,
1000 km/second is ~315.360.000.00, = Z, kilometers/year.
So, X x Z = Y and  X=Z/Y,    X = 480 years with given values)


This artwork belongs to my VISION Series, the image is made out of my original photo of starless Simeis 147 supernova remnant.

Every single element in Vision series photos are from my original astronomical photos. I have been using the Overlapping Lightning Method (Multi Exposure Method) to create my Vision series photographs. By this method the forms and structures in astronomical object get multiplied, they are now forming a new visual dimension beyond our physical universe.


Artworks are made purely out of starless Simeis 147 image.

Technical Details

Photo from 2020

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

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
H-alpha, 15 x 1200 s, binned 1x1 = 5 h
O-III, 24x 600 s, binned 2x2 = 4 h
S-II, 1 x 12 x 600 s. binned 2x2 = 2 h

Photo from 2011

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
Levels, curves and color combine in PS CS3.

Optics, Canon EF 200mm camera lens at f1.8
Camera, QHY9
Guiding, Meade LX200 GPS 12" and a Lodestar guider
Image Scale, ~5 arcseconds/pixel

H-alpha 34x900s, Binned 1x1
H-alpha 14x1800s, Binned 1x1
H-alpha  42x1200s, binned 1x1
Total exposure time for Hydrogen alpha is 26h

O-III & S-II channels are from an older image,  exposure time 8h

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