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Contains:  Crescent nebula, NGC 6888
Getting plate-solving status, please wait...
WR136 HIP99546, 





    
        

            Stephane Neveu

WR136 HIP99546

Technical card

Resolution: 1237x544

Dates:May 25, 2014

Frames: 40x10" -10C

Integration: 0.1 hours

Darks: ~20

Bias: ~25

Avg. Moon age: 26.29 days

Avg. Moon phase: 11.45%

Bortle Dark-Sky Scale: 2.00

Mean FWHM: 5.00

Temperature: 7.00

Astrometry.net job: 383108

Locations: Nayrac - Aveyron, Le Nayrac, Aveyron, France

Description

Crop on NGC6888 (http://www.astrobin.com/98759 )
+ Raw spectrum
+ Normalised intensity spectrum

NIII / NIV lines presents. NV present but weak.
--> WR136 is a Wn6(h) Wolf rayet star

Pickering decrement on He II lines
He II excess on 6560 Ang showing presence of H hidden by helium.
Then spectral class WN6 is completed by (h) for hydrogen.

Cyg OB1 association
Stellar wind velocity 1750 km/s
distance 5000 a.l

Comments

Author

Stef
Stephane Neveu
License: None (All rights reserved)
5171
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Revisions

  • WR136 HIP99546, 





    
        

            Stephane Neveu
    Original
  • WR136 HIP99546, 





    
        

            Stephane Neveu
    B
  • WR136 HIP99546, 





    
        

            Stephane Neveu
    E
  • Final
    WR136 HIP99546, 





    
        

            Stephane Neveu
    F

Histogram

WR136 HIP99546, 





    
        

            Stephane Neveu