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Re:Starlink Satellites Tracker by amackera on Friday May 07, 2021 @05:31PM (#27081077)
Thanks for the info!
Re:Starlink Satellites Tracker by ortusdux on Friday May 07, 2021 @05:36PM (#27081125)
Absolutely! Things will be really interesting when they can use Starships to launch batches. I've seen estimates that they could launch 600 starlink satellites at a time. They could theatrically also launch fewer, but put them all the way into their final orbit, skipping the few weeks of light pollution.
Re:Starlink Satellites Tracker by grecy on Friday May 07, 2021 @05:49PM (#27081244)
> They could theatrically also launch fewer, but put them all the way into their final orbit

I wonder if they might choose to do this so the sats keep more of their onboard fuel, and will be able to keep themselves in orbit a bit longer before the inevitable re-entry burn up.

Re:Starlink Satellites Tracker by Dylan16807 on Friday May 07, 2021 @06:11PM (#27081431)
That's a tradeoff that could be made, but the onboard ion thrusters are about 5x as efficient as the rocket. They'd probably be much better off making the onboard tanks a bit larger and launching to the same low orbit.
Re:Starlink Satellites Tracker by thereisnospork on Friday May 07, 2021 @05:57PM (#27081316)
I'd guess it is more efficient to have them boost themselves, so that they act as an additional rocket stage. (and so not need the delta V to elevate and then de-elevate starship's orbit.)
Re:Starlink Satellites Tracker by colechristensen on Friday May 07, 2021 @08:55PM (#27082597)
There is certainly someone doing the optimization problem for the orbit insertion and fuel loads and picking the right set of tradeoffs.
Re:Starlink Satellites Tracker by londons_explore on Saturday May 08, 2021 @03:50AM (#27084909)
The optimization problem also includes drag losses at the lower altitudes.

And those drag losses are a lot lower keeping all the satellites inside the rocket rather than having each experience its own drag.

Might be worth putting an ion drive on the f9 2nd stage for that reason...

Re:Starlink Satellites Tracker by trothamel on Friday May 07, 2021 @06:26PM (#27081535)
Re-entry is a bit of a feature, though - should a satellite be DOA, it will be in a low orbit and burn up faster.
Re:Starlink Satellites Tracker by gpm on Friday May 07, 2021 @10:30PM (#27083173)
I wonder if they could use another satellite to sweep a DOA satellite. They all start in almost identical orbits, so unlike most orbital degree cleanup plans there aren't huge relative velocities to deal with or anything...

It would mean that 1 DOA satellite means bringing down 2, but that might be worth it if the DOA rate is low.

Re:Starlink Satellites Tracker by grecy on Saturday May 08, 2021 @01:10AM (#27084070)
Absolutely, but for the ones that are not DOA, having more fuel on board means they can re-boot themselves for a longer time, thus staying up for longer and getting a longer service life per sat...
Re:Starlink Satellites Tracker by m4rtink on Friday May 07, 2021 @11:35PM (#27083579)
Or they could do it theatrically and once in a while make the most sats possible as bright as possible for a pre announced one orbital period with good ground visibility in inhabitted areas. Would be quite a sight! :)

They are getting a bit too good at reducing Starlink visibility lately so I could definitely welcome an event like that. :)

Re:Starlink Satellites Tracker by VortexDream on Saturday May 08, 2021 @04:36AM (#27085133)
They could start doing shapes and messages. Throw in some colors. Maybe provide a service where you can get them to show a message of your choice.
Re:Starlink Satellites Tracker by bruckie on Friday May 07, 2021 @11:44PM (#27083619)
> They could theatrically also launch fewer

I'd love to see a theatrical launch. :)