90 Herculis 2014-09-04 (evan9162)

90 Herculis 2014-09-04

90 Herculis is a close double in Hercules, that is difficult to split due to the large difference in brightness between the primary and secondary (about 25x), and the close separation. In fact, with a 4-5" scope, the secondary sits right on the first diffraction ring, increasing the difficulty of detection. Even with a 6" scope, it lies just on the edge of the first diffraction ring, so it is very difficult to detect.

I was unable to visually see the secondary, no doubt hampered by the poor seeing. Even with imaging, stacking, and processing, the secondary is very hard to discern.

Coordinates

RA: 17h 53' 18.03"

DEC: +40* 00' 28.6"

Separation: 1.6"

Mag: P: 5.3 S:8.8

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	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
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Landscape

Distribution of data sources

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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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Status	Basic failed
Started	...
Astrometry.net job	358716
PixInsight job	n/a
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