Andromedas Parachute (Gravitation lense)  

Observations Germerswang am 12th November 2018

Th. Boeckel      




Newton 800mm 8", f4,5, 10sec, ASA 3200, Canon 5DMIII

Newton 1900mm 12,7", f.6, 9sec, ASA 3200, Canon 5DMIII


Newton 1900mm (Ausschnitt x20)  12,7";   f.6;  Exp 9sec ;  ASA 3200, Canon 5DMIII


What is Andromeda's Parachute?

It is a quad lensed quasar* (mag * 14/18) in the constellation Andromeda. The cause of the quadruple projection is a gravitational lens which stands between us and the light source and accordingly redirects or divides the light beam of the object by the strength of the gravitational force of the lens. The cause of this phenomenon is a far-off mass-rich object in space, a galaxy or a black hole. The princip of space-time bending may take place. This object was first discovered in June 2017 by the PanSTARRS telescope / 1.8m in Hawaii. This object is similar in principle to the Einstein Cross but is unique in its appearance. The object is about 3 seconds of arc and is damn tiny, comes to scale of a 1 Euro coin (ca. 2cm) seen from a range of 1.5 km. Depending on the seeing or quality of your optics this "parachute" can be separated into three adjacent quasars or light points. The fourth projection should be below the arc (sketch map). So this is truly an invitation to test your quality of optics. From the photographic point of view, somedays it will maybe succeed to work out the complete resolution of three / four projections. I'll stay tuned!

Quasar*  rough  explained, active core of a galaxy which appear like a bright star.

*mag:  light magnitude= >  up to mag +3-4 stars are visible nearby cities with the naked eye, in very dark areas the seeing limit can reach up to mag +6-7. The more higher numerical value is given, the more weaker are the objects. E.g. - 4,7 mag, Venus glittering; - 1,0 Sirius, brightest star; +3,5 M31 Andromeda, pale shiny oval.

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2020, Thorsten Boeckel, last modification 10/07/2020

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