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Sh2 175 H-alpha RGB, 





    
        

            jerryyyyy
Sh2 175 H-alpha RGB

Sh2 175 H-alpha RGB

Technical card

Resolution: 1356x1288

Dates:Oct. 4, 2019

Frames:
Astrodon Blue Tru-Balance E-Series Gen 2: 12x240" bin 1x1
Astrodon Green Tru-Balance E-Series Gen 2: 12x240" bin 1x1
Astrodon H-alpha 5nm: 18x1800" bin 1x1
Astrodon Red Tru-Balance E-Series Generation 2: 12x240" bin 1x1

Integration: 11.4 hours

Avg. Moon age: 6.22 days

Avg. Moon phase: 37.79%

Astrometry.net job: 2966874

RA center: 6.820 degrees

DEC center: 64.706 degrees

Pixel scale: 0.611 arcsec/pixel

Orientation: 0.002 degrees

Field radius: 0.159 degrees

Locations: Stanford Faculty Observatory, Stanford, California, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

One more of the smaller (2"x2") Sharpless2 objects.

Information from:

http://galaxymap.org/cat/list/sharpless/171

Sh 2-175 appears in the direction of a supershell of molecular and atomic hydrogen clouds surrounding the Cas OB5 association, which is part of the Perseus arm. A widely varying range of distances to this nebula and its potential ionising star has been published in the scientific literature.

Avedisova gives the ionising star of Sh 2-175 as LS I +64 26 (O9.5 V), which Humphreys lists as a field star outside of any OB association.

Russeil concludes that LS I +64 26 is actually a B1.5 V star at 1090 +/- 210 parsecs and locates Sh 2-175 at this much closer distance.

You can read more about this region (with full references) in this galactic plane commentary (see the above web site).

Comments

Author

jerryyyyy
jerryyyyy
License: None (All rights reserved)
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Sh2 175 H-alpha RGB, 





    
        

            jerryyyyy