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Double Star Measurements

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YPFA's picture
Joined: 2012-07-22

Suppose you want to do double star measurements by using "Measure PA / Sep" from the Tools menu ...

Prior to selecting "Measure PA / Sep", if one labels the primary as "Star 1" and the companion as "Star 2", will VPhot automatically centre the concentric circles on the centroid of each star?

If not, how does one do this - getting the circles accurately on top of the centroid would seem to be essential to get good measurements?


Double Star Measurements
kge's picture
Joined: 2010-07-19

Hi Paul,

Yes, VPHOT will center on the centroid of the star. It always does when a star is selected (either by clicking on the image or importing from catalogs).


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