What is the orbit and expected lifetime of Crew Dragon trunk?












6












$begingroup$


Per the timeline mentioned in the webcast the Crew Dragon separated from its trunk before the deorbit burn.



I suppose that happens so clean separation can be confirmed before committing to deorbit as reentry with the trunk still attached would be a problem (and it saves some fuel too).



But it means now there is a standalone Dragon trunk in LEO which might take some time to slow down to (uncontrollably) reentry.



What orbit was it left in? Did the Dragon lower the perigee meaningfully before the separation or is it left near the current ISS altitude?



And how long is it expected to stay there before being slowed down enough to burn in the atmosphere?










share|improve this question









$endgroup$

















    6












    $begingroup$


    Per the timeline mentioned in the webcast the Crew Dragon separated from its trunk before the deorbit burn.



    I suppose that happens so clean separation can be confirmed before committing to deorbit as reentry with the trunk still attached would be a problem (and it saves some fuel too).



    But it means now there is a standalone Dragon trunk in LEO which might take some time to slow down to (uncontrollably) reentry.



    What orbit was it left in? Did the Dragon lower the perigee meaningfully before the separation or is it left near the current ISS altitude?



    And how long is it expected to stay there before being slowed down enough to burn in the atmosphere?










    share|improve this question









    $endgroup$















      6












      6








      6





      $begingroup$


      Per the timeline mentioned in the webcast the Crew Dragon separated from its trunk before the deorbit burn.



      I suppose that happens so clean separation can be confirmed before committing to deorbit as reentry with the trunk still attached would be a problem (and it saves some fuel too).



      But it means now there is a standalone Dragon trunk in LEO which might take some time to slow down to (uncontrollably) reentry.



      What orbit was it left in? Did the Dragon lower the perigee meaningfully before the separation or is it left near the current ISS altitude?



      And how long is it expected to stay there before being slowed down enough to burn in the atmosphere?










      share|improve this question









      $endgroup$




      Per the timeline mentioned in the webcast the Crew Dragon separated from its trunk before the deorbit burn.



      I suppose that happens so clean separation can be confirmed before committing to deorbit as reentry with the trunk still attached would be a problem (and it saves some fuel too).



      But it means now there is a standalone Dragon trunk in LEO which might take some time to slow down to (uncontrollably) reentry.



      What orbit was it left in? Did the Dragon lower the perigee meaningfully before the separation or is it left near the current ISS altitude?



      And how long is it expected to stay there before being slowed down enough to burn in the atmosphere?







      spacex reentry dragon-v2






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked yesterday









      jkavalikjkavalik

      3,63711335




      3,63711335






















          2 Answers
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          active

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          8












          $begingroup$

          According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.




          Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
          a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
          Dep-3 and Dep-4 burns were quite small.




          Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.






          share|improve this answer









          $endgroup$





















            7












            $begingroup$

            Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 830kg with a 14 m^2 cross section, it should reenter in around one year.



            This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.






            share|improve this answer











            $endgroup$









            • 2




              $begingroup$
              space.stackexchange.com/a/9063/5979 says "less than 1000kg".
              $endgroup$
              – BowlOfRed
              23 hours ago








            • 1




              $begingroup$
              Citation needed, but I'll assume 830kg in my estimate instead of 2 tons, since that gives a nice round year time to reentry.
              $endgroup$
              – Russell Borogove
              23 hours ago













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            2 Answers
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            active

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            2 Answers
            2






            active

            oldest

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            active

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            active

            oldest

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            8












            $begingroup$

            According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.




            Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
            a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
            Dep-3 and Dep-4 burns were quite small.




            Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.






            share|improve this answer









            $endgroup$


















              8












              $begingroup$

              According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.




              Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
              a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
              Dep-3 and Dep-4 burns were quite small.




              Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.






              share|improve this answer









              $endgroup$
















                8












                8








                8





                $begingroup$

                According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.




                Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
                a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
                Dep-3 and Dep-4 burns were quite small.




                Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.






                share|improve this answer









                $endgroup$



                According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.




                Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
                a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
                Dep-3 and Dep-4 burns were quite small.




                Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered yesterday









                BowlOfRedBowlOfRed

                3,4411019




                3,4411019























                    7












                    $begingroup$

                    Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 830kg with a 14 m^2 cross section, it should reenter in around one year.



                    This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.






                    share|improve this answer











                    $endgroup$









                    • 2




                      $begingroup$
                      space.stackexchange.com/a/9063/5979 says "less than 1000kg".
                      $endgroup$
                      – BowlOfRed
                      23 hours ago








                    • 1




                      $begingroup$
                      Citation needed, but I'll assume 830kg in my estimate instead of 2 tons, since that gives a nice round year time to reentry.
                      $endgroup$
                      – Russell Borogove
                      23 hours ago


















                    7












                    $begingroup$

                    Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 830kg with a 14 m^2 cross section, it should reenter in around one year.



                    This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.






                    share|improve this answer











                    $endgroup$









                    • 2




                      $begingroup$
                      space.stackexchange.com/a/9063/5979 says "less than 1000kg".
                      $endgroup$
                      – BowlOfRed
                      23 hours ago








                    • 1




                      $begingroup$
                      Citation needed, but I'll assume 830kg in my estimate instead of 2 tons, since that gives a nice round year time to reentry.
                      $endgroup$
                      – Russell Borogove
                      23 hours ago
















                    7












                    7








                    7





                    $begingroup$

                    Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 830kg with a 14 m^2 cross section, it should reenter in around one year.



                    This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.






                    share|improve this answer











                    $endgroup$



                    Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 830kg with a 14 m^2 cross section, it should reenter in around one year.



                    This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.







                    share|improve this answer














                    share|improve this answer



                    share|improve this answer








                    edited 23 hours ago

























                    answered yesterday









                    Russell BorogoveRussell Borogove

                    87k3291376




                    87k3291376








                    • 2




                      $begingroup$
                      space.stackexchange.com/a/9063/5979 says "less than 1000kg".
                      $endgroup$
                      – BowlOfRed
                      23 hours ago








                    • 1




                      $begingroup$
                      Citation needed, but I'll assume 830kg in my estimate instead of 2 tons, since that gives a nice round year time to reentry.
                      $endgroup$
                      – Russell Borogove
                      23 hours ago
















                    • 2




                      $begingroup$
                      space.stackexchange.com/a/9063/5979 says "less than 1000kg".
                      $endgroup$
                      – BowlOfRed
                      23 hours ago








                    • 1




                      $begingroup$
                      Citation needed, but I'll assume 830kg in my estimate instead of 2 tons, since that gives a nice round year time to reentry.
                      $endgroup$
                      – Russell Borogove
                      23 hours ago










                    2




                    2




                    $begingroup$
                    space.stackexchange.com/a/9063/5979 says "less than 1000kg".
                    $endgroup$
                    – BowlOfRed
                    23 hours ago






                    $begingroup$
                    space.stackexchange.com/a/9063/5979 says "less than 1000kg".
                    $endgroup$
                    – BowlOfRed
                    23 hours ago






                    1




                    1




                    $begingroup$
                    Citation needed, but I'll assume 830kg in my estimate instead of 2 tons, since that gives a nice round year time to reentry.
                    $endgroup$
                    – Russell Borogove
                    23 hours ago






                    $begingroup$
                    Citation needed, but I'll assume 830kg in my estimate instead of 2 tons, since that gives a nice round year time to reentry.
                    $endgroup$
                    – Russell Borogove
                    23 hours ago




















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