Celestial hemisphere:  Southern  ·  Constellation: Virgo (Vir)  ·  Contains:  Solar system body or event
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ISON last night, 



    
        

            José J. Chambó
ISON last night
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Getting plate-solving status, please wait...
ISON last night, 



    
        

            José J. Chambó
ISON last night
Powered byPixInsight

Acquisition details

Dates:
Nov. 20, 2013
Frames:
15×25(6′ 15″) ISO800
Integration:
6′ 15″
Darks:
15
Flats:
22
Bias:
100
Avg. Moon age:
17.40 days
Avg. Moon phase:
92.33%
Bortle Dark-Sky Scale:
7.00
Mean SQM:
17.40
Mean FWHM:
5.57

Basic astrometry details

Astrometry.net job: 4344921

RA center: 13h49m38s.9

DEC center: -13°3957

Pixel scale: 5.118 arcsec/pixel

Orientation: 7.203 degrees

Field radius: 1.025 degrees

Resolution: 1200x800

Locations: Vallés - Valencia (Spain), Vallés, Valencia, Spain

Data source: Backyard

Description

November 20 was the last night to see the comet before dawn in its way to perihelion. At 5 magnitude, to the limit for see it at naked eye. Although not fit in the 1,5º field of image, it shows a long bluish gas tail, inside seems have a narrow orange band caused by sodium emission that only occurs near the Sun.

Full story in the Blog  Cometografia.es

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ISON last night, 



    
        

            José J. Chambó