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This is an exercise from a text, I’m learning from and I can’t understand it so I’m asking just to develop my knowledge:

The explosion of V603 Aql (Nova Aquilae) took place in June 1918. The nova reached maximum brightness -1.1 mag. The nova's spectrum was observed to shift absorption lines corresponding to a radial speed of 1700 km/s. In 1926, a weak envelope was observed around the nova with an angle of 16''.

Determine the distance and absolute brightness at maximum for V603 Aql.

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    $\begingroup$ Sounds like an exam question. $\endgroup$ – Rob Jeffries May 30 at 21:48
  • $\begingroup$ It’s from the book, I’m learning from and I can’t understand it so I’m asking just to develop my knowledge $\endgroup$ – Paulina Góra May 30 at 21:50
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    $\begingroup$ "the book?" what book? What don't you understand about it? $\endgroup$ – James K May 31 at 7:45
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    $\begingroup$ Perhaps add the reference of the book you are citing ? $\endgroup$ – usernumber May 31 at 8:35
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    $\begingroup$ A good starting point for tackling this is looking into approximating the distance using stellar parallax. I've answered a question on this Exchange on determining the brightness of stellar objects. astronomy.stackexchange.com/questions/36025/… $\endgroup$ – sbjartmar Jun 3 at 12:06

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