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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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Paulina Góra
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    Sounds like an exam question. – ProfRob May 30 '20 at 21:48
  • It’s from the book, I’m learning from and I can’t understand it so I’m asking just to develop my knowledge – Paulina Góra May 30 '20 at 21:50
  • I've made a small adjustment to the format based on your comment. Can you double check the book for the end of the first quoted paragraph, is it 16 arcseconds (16") or 16 arcminutes (16')? Thanks! – uhoh May 31 '20 at 02:04
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    "the book?" what book? What don't you understand about it? – James K May 31 '20 at 07:45
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    Perhaps add the reference of the book you are citing ? – usernumber May 31 '20 at 08:35
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    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. https://astronomy.stackexchange.com/questions/36025/how-do-we-measure-the-brightness-of-the-stars/36026#36026 – sbjartmar Jun 03 '20 at 12:06

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