Habitable zone around a Blue Supergiant

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I am writing a story centered around a planet orbiting a Blue Supergiant star.
What I want to know is how far away a planet would have to be to be in the habitable zone of such a star. The star I have in mind is roughly comparable to Rigel and don't mind anything like the need for protection from radiation, the race that inhabits this world can handle radiation and the likes of solar flares to the point they basically thrive in radiation that would utterly destroy a human.



Some side questions I have are these:



  • How many Earth years would 1 year on this planet be?


  • Would the 4 seasons still be roughly equally divided in that year?






science-based planets orbital-mechanics







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    I am writing a story centered around a planet orbiting a Blue Supergiant star.
    What I want to know is how far away a planet would have to be to be in the habitable zone of such a star. The star I have in mind is roughly comparable to Rigel and don't mind anything like the need for protection from radiation, the race that inhabits this world can handle radiation and the likes of solar flares to the point they basically thrive in radiation that would utterly destroy a human.



    Some side questions I have are these:



    • How many Earth years would 1 year on this planet be?


    • Would the 4 seasons still be roughly equally divided in that year?






    science-based planets orbital-mechanics







    share|improve this question









    New contributor




    Blue Devil is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
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      down vote

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      up vote
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      favorite











      I am writing a story centered around a planet orbiting a Blue Supergiant star.
      What I want to know is how far away a planet would have to be to be in the habitable zone of such a star. The star I have in mind is roughly comparable to Rigel and don't mind anything like the need for protection from radiation, the race that inhabits this world can handle radiation and the likes of solar flares to the point they basically thrive in radiation that would utterly destroy a human.



      Some side questions I have are these:



      • How many Earth years would 1 year on this planet be?


      • Would the 4 seasons still be roughly equally divided in that year?






      science-based planets orbital-mechanics







      share|improve this question









      New contributor




      Blue Devil is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I am writing a story centered around a planet orbiting a Blue Supergiant star.
      What I want to know is how far away a planet would have to be to be in the habitable zone of such a star. The star I have in mind is roughly comparable to Rigel and don't mind anything like the need for protection from radiation, the race that inhabits this world can handle radiation and the likes of solar flares to the point they basically thrive in radiation that would utterly destroy a human.



      Some side questions I have are these:



      • How many Earth years would 1 year on this planet be?


      • Would the 4 seasons still be roughly equally divided in that year?






      science-based planets orbital-mechanics




      science-based planets orbital-mechanics






      share|improve this question









      New contributor




      Blue Devil is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









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      Blue Devil is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      share|improve this question








      edited 2 hours ago









      kingledion

      67.8k22224384




      67.8k22224384






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          2 Answers
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          Ok, so using Rigel as an example:



          Rigel has a luminosity of 120,000 sols, so for a planet to receive the same insolation as the Earth does around the sun, it would orbit at a distance of 346.4 AU.



          Given a stellar mass of 23 sols, and a planetary mass of 1 Earth, the year length is 1344.09 Earth years.



          Seasons are tricky since they have to do with the axial tilt of the planet, and given the year length, precession could actually cause the seasons to shift within that time.



          You should also be aware that the spectrum of the host star has an effect of the strength of ice albedo feedback in the climate of planets. It is possible that around a Blue Giant, that more of the total insolation would be reflected back into space, so this hypothetical planet could very well be an irradiated snowball.



          Reference: https://arxiv.org/abs/1305.6926






          share|improve this answer


















          • 1




            Math checks out, good answer!
            – kingledion
            2 hours ago

















          up vote
          1
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          Note that the lifespan of the star is going to factor here. Rigel is estimated to be only about 10 million years old and will go kablooey in a supernova within the next few million years. That makes the odds of any life-bearing planets around any similar star extremely slim and unlikely as they'd barely have time to finish cooling to a temperature to support life before the big bang. Earth took a few hundred million years before it did it.






          share|improve this answer




















            Your Answer





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            2 Answers
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            2 Answers
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            active

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            up vote
            3
            down vote













            Ok, so using Rigel as an example:



            Rigel has a luminosity of 120,000 sols, so for a planet to receive the same insolation as the Earth does around the sun, it would orbit at a distance of 346.4 AU.



            Given a stellar mass of 23 sols, and a planetary mass of 1 Earth, the year length is 1344.09 Earth years.



            Seasons are tricky since they have to do with the axial tilt of the planet, and given the year length, precession could actually cause the seasons to shift within that time.



            You should also be aware that the spectrum of the host star has an effect of the strength of ice albedo feedback in the climate of planets. It is possible that around a Blue Giant, that more of the total insolation would be reflected back into space, so this hypothetical planet could very well be an irradiated snowball.



            Reference: https://arxiv.org/abs/1305.6926






            share|improve this answer


















            • 1




              Math checks out, good answer!
              – kingledion
              2 hours ago














            up vote
            3
            down vote













            Ok, so using Rigel as an example:



            Rigel has a luminosity of 120,000 sols, so for a planet to receive the same insolation as the Earth does around the sun, it would orbit at a distance of 346.4 AU.



            Given a stellar mass of 23 sols, and a planetary mass of 1 Earth, the year length is 1344.09 Earth years.



            Seasons are tricky since they have to do with the axial tilt of the planet, and given the year length, precession could actually cause the seasons to shift within that time.



            You should also be aware that the spectrum of the host star has an effect of the strength of ice albedo feedback in the climate of planets. It is possible that around a Blue Giant, that more of the total insolation would be reflected back into space, so this hypothetical planet could very well be an irradiated snowball.



            Reference: https://arxiv.org/abs/1305.6926






            share|improve this answer


















            • 1




              Math checks out, good answer!
              – kingledion
              2 hours ago












            up vote
            3
            down vote










            up vote
            3
            down vote









            Ok, so using Rigel as an example:



            Rigel has a luminosity of 120,000 sols, so for a planet to receive the same insolation as the Earth does around the sun, it would orbit at a distance of 346.4 AU.



            Given a stellar mass of 23 sols, and a planetary mass of 1 Earth, the year length is 1344.09 Earth years.



            Seasons are tricky since they have to do with the axial tilt of the planet, and given the year length, precession could actually cause the seasons to shift within that time.



            You should also be aware that the spectrum of the host star has an effect of the strength of ice albedo feedback in the climate of planets. It is possible that around a Blue Giant, that more of the total insolation would be reflected back into space, so this hypothetical planet could very well be an irradiated snowball.



            Reference: https://arxiv.org/abs/1305.6926






            share|improve this answer














            Ok, so using Rigel as an example:



            Rigel has a luminosity of 120,000 sols, so for a planet to receive the same insolation as the Earth does around the sun, it would orbit at a distance of 346.4 AU.



            Given a stellar mass of 23 sols, and a planetary mass of 1 Earth, the year length is 1344.09 Earth years.



            Seasons are tricky since they have to do with the axial tilt of the planet, and given the year length, precession could actually cause the seasons to shift within that time.



            You should also be aware that the spectrum of the host star has an effect of the strength of ice albedo feedback in the climate of planets. It is possible that around a Blue Giant, that more of the total insolation would be reflected back into space, so this hypothetical planet could very well be an irradiated snowball.



            Reference: https://arxiv.org/abs/1305.6926







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited 4 mins ago

























            answered 2 hours ago









            Arkenstein

            780212




            780212







            • 1




              Math checks out, good answer!
              – kingledion
              2 hours ago












            • 1




              Math checks out, good answer!
              – kingledion
              2 hours ago







            1




            1




            Math checks out, good answer!
            – kingledion
            2 hours ago




            Math checks out, good answer!
            – kingledion
            2 hours ago










            up vote
            1
            down vote













            Note that the lifespan of the star is going to factor here. Rigel is estimated to be only about 10 million years old and will go kablooey in a supernova within the next few million years. That makes the odds of any life-bearing planets around any similar star extremely slim and unlikely as they'd barely have time to finish cooling to a temperature to support life before the big bang. Earth took a few hundred million years before it did it.






            share|improve this answer
























              up vote
              1
              down vote













              Note that the lifespan of the star is going to factor here. Rigel is estimated to be only about 10 million years old and will go kablooey in a supernova within the next few million years. That makes the odds of any life-bearing planets around any similar star extremely slim and unlikely as they'd barely have time to finish cooling to a temperature to support life before the big bang. Earth took a few hundred million years before it did it.






              share|improve this answer






















                up vote
                1
                down vote










                up vote
                1
                down vote









                Note that the lifespan of the star is going to factor here. Rigel is estimated to be only about 10 million years old and will go kablooey in a supernova within the next few million years. That makes the odds of any life-bearing planets around any similar star extremely slim and unlikely as they'd barely have time to finish cooling to a temperature to support life before the big bang. Earth took a few hundred million years before it did it.






                share|improve this answer












                Note that the lifespan of the star is going to factor here. Rigel is estimated to be only about 10 million years old and will go kablooey in a supernova within the next few million years. That makes the odds of any life-bearing planets around any similar star extremely slim and unlikely as they'd barely have time to finish cooling to a temperature to support life before the big bang. Earth took a few hundred million years before it did it.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 14 mins ago









                Keith Morrison

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