Here are some of the variables that will affect deorbit Altitude, mass, speed and surface area. At the lower orbit aka 500km where starlink is there is still some atmosphere so they are are getting air resistance and are slowing down. As they slow down they get more air resistance until they fully deorbit. If I remember right the starlink satellites need boosting nearly constantly or they will deorbit and will deorbit in less than 5 years without the active management. It has been also said the satellites have been designed so completely break up during the orbit so that nothing reaches the ground.
On Tue, Nov 3, 2020, 5:41 PM Robert <[email protected]> wrote: > I think it's about how much delta v required to de-orbit vs. park. For > LEO sats the DV is smaller to deorbit vs. park. For sync sats, it's just > about getting it above the very valuable sync orbit. So a small increase > in orbit is not much fuel. For lower than sync, it's a lot of unused > space and a long way down to deorbit so they usually stay where they are. > > On 11/3/20 2:33 PM, Adam Moffett wrote: > > I think the best practice right now is to save enough propellant to boost > your old satellite into a parking orbit. The idea is we spent a grillion > dollars putting it up there, and someday we might harvest old satellites > for material rather than launching new stuff for a grillion more. You'd > have to burn propellant to de-orbit too, so if you're going to keep extra > gas on the ship then you might as well use it to park instead. > > If Elon Musk wants to waste his own grillions by letting them burn up in > the atmosphere, then he can do that. > On 11/3/2020 4:28 PM, Steve Jones wrote: > > is there any accountability for debris left in space? like littering > tickets? why hasnt somebody like elon musk made a space roomba that just > goes and pings each item out of orbit back into the atmosphere since we > know where it all is > > On Tue, Nov 3, 2020 at 3:04 PM Brian Webster <[email protected]> > wrote: > >> When you zoom in on the map the objects move in real time. >> >> Thank you, >> Brian Webster >> www.wirelessmapping.com >> >> >> -----Original Message----- >> From: AF [mailto:[email protected]] On Behalf Of Ken Hohhof >> Sent: Tuesday, November 3, 2020 1:47 PM >> To: 'AnimalFarm Microwave Users Group' >> Subject: Re: [AFMUG] space junk >> >> What about the moon Nazis? >> >> -----Original Message----- >> From: AF <[email protected]> On Behalf Of [email protected] >> Sent: Tuesday, November 3, 2020 12:21 PM >> To: [email protected] >> Subject: Re: [AFMUG] space junk >> >> I have this vague recollection that we currently can't even track all the >> space junk. There was some lower limit, in the order of inches(?), below >> which there isn't enough of a radar(?) return. >> >> All I want to know, how long until Kessler syndrome? :) >> >> >> Jared >> >> >> >> >> From: "Cameron Crum" <[email protected]> >> To: "AnimalFarm Microwave Users Group" <[email protected]> >> Subject: [AFMUG] space junk >> >> Just because I know a bunch of you guys are interested in space stuff. >> Check >> out this really cool site that shows every object in orbit around our >> planet. >> >> http://stuffin.space-- AF mailing list [email protected] >> >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com[http://af.afmug.com/mai >> lman/listinfo/af_af.afmug.com] >> <http://af.afmug.com/mailman/listinfo/af_af.afmug.com%5Bhttp://af.afmug.com/mailman/listinfo/af_af.afmug.com%5D> >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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