Author Topic: SpaceX Falcon 9 : Türksat 5A : January 7/8, 2021 (Read 94132 times)

LouScheffer · « **Reply #140 on:** 01/08/2021 02:42 pm »

Quote from: Raul on 01/08/2021 05:56 am

Turksat-5A with stage2 as two cataloged objects with initial orbital parameters:

2021-001A - TBA - TO BE ASSIGNED - 2021-01-08 05:47 UTC - 286.17/55031.12km/17.66°
2021-001B - TBA - TO BE ASSIGNED - 2021-01-08 05:52 UTC - 285.5/55277.64km/17.66°

This is an interesting compromise. F9 could give this payload any apogee they want (the NASA LSP web calculator, which is known to be pretty conservative, shows F9 can put 3300 kg to Earth escape). And in theory a really high apogee is even better - you go super high where the plane change costs almost nothing, then back down into geosync. This gives about 1275 m/s total, rather than the 1540 m/s or so here.

But a super high apogee can cause problems. Minor perturbations by the moon, etc., can lower the perigee and cause accidental re-entry if you can't raise the perigee quickly enough (this has happened). Also geo-sync satellites may not be designed for deep space operation - Earth sensors, communication, and so on is all designed for geosync. And super high orbits take a lot of patience - a single orbit can take weeks.

So it looks like they picked the greatest apogee they were comfortable with, then spend the rest of the delta-V on inclination reduction.

PS: The satellite that had problems with a very high apogee (120,000 km) was Superbird 6. A discussion of how this might have happened is on this non-NSF forum.

FutureSpaceTourist · « **Reply #141 on:** 01/08/2021 03:58 pm »

https://twitter.com/kyle_m_photo/status/1347585832966909954

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Falcon 9 lifting off with Turksat 5A, a Turkish communications satellite. #SpaceX #Falcon9 #Turksat5A #Turksat

Full Gallery ➡ kylemphoto.com/Galleries/Turk…

https://twitter.com/kyle_m_photo/status/1347588068929376256

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Falcon 9 was doing it's best Atlas impression, throwing stuff at our remotes

FutureSpaceTourist · « **Reply #142 on:** 01/08/2021 05:06 pm »

https://twitter.com/spacexfleet/status/1347605450808848385

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Just Read the Instructions droneship has departed from the Turksat-5A landing zone and is en-route to Port Canaveral, Florida!

Arrival ETA looking at Mon 11th / Tue 12th.

Jansen · « **Reply #143 on:** 01/08/2021 05:08 pm »

Quote from: erv on 01/08/2021 10:08 am

No news from fairing catchers?

https://twitter.com/SpaceXFleet/status/1347363456152961024

Both ships are on the way back

gongora · « **Reply #144 on:** 01/08/2021 05:16 pm »

Quote from: Jansen on 01/08/2021 05:08 pm

Quote from: erv on 01/08/2021 10:08 am
No news from fairing catchers?

https://twitter.com/SpaceXFleet/status/1347363456152961024

Both ships are on the way back

To be clear, that tweet means it's the first attempt to catch a fairing this year. There wasn't any news on whether it was successful.

FutureSpaceTourist · « **Reply #145 on:** 01/08/2021 05:24 pm »

SoaceX photos by Ben Cooper

Jansen · « **Reply #146 on:** 01/08/2021 07:25 pm »

Quote from: gongora on 01/08/2021 05:16 pm

To be clear, that tweet means it's the first attempt to catch a fairing this year. There wasn't any news on whether it was successful.

Yes, it was posted before the launch. Mostly to show that only one catch attempt was going to be made. Thanks for clarifying.

FutureSpaceTourist · « **Reply #147 on:** 01/08/2021 11:36 pm »

https://twitter.com/mdcainjr/status/1347570232852963329

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SpaceX’s merlin engines doing what they do best! Congrats to @elonmusk and @SpaceX for another mission success! Way to start the year. #Turksat5A

Looking forward to the SN9 hop coming soon!

FutureSpaceTourist · « **Reply #148 on:** 01/09/2021 12:16 am »

https://twitter.com/spacexfleet/status/1347709658342055939

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SpaceX recovery fleet status as of Jan 8th!

Ms. Tree and Ms. Chief will be arriving at Port Canaveral daytime tomorrow (9th).

JRTI and B1060 are estimated to arrive early Monday (11th) - subject to change!

FutureSpaceTourist · « **Reply #149 on:** 01/09/2021 08:45 pm »

https://twitter.com/spacexfleet/status/1348022924335263744

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Ms. Tree and Ms. Chief will be arriving at Port Canaveral in approximately two hours.

scr00chy · « **Reply #150 on:** 01/09/2021 11:36 pm »

https://twitter.com/Kyle_M_Photo/status/1348059620099710982

https://twitter.com/spacecoast_stve/status/1348064230721941511

FutureSpaceTourist · « **Reply #151 on:** 01/10/2021 01:28 pm »

https://twitter.com/nasaspaceflight/status/1348275312199692291

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Fairing looks good.

PS Go back a few years and who would have thought we'd be talking about "recovered fairings on huge speedboats with massive arms"?

Jansen · « **Reply #152 on:** 01/11/2021 01:40 am »

https://twitter.com/SpaceXFleet/status/1348439483226574849

Jansen · « **Reply #153 on:** 01/11/2021 07:53 pm »

https://twitter.com/SpaceXFleet/status/1348728247706652672

FutureSpaceTourist · « **Reply #154 on:** 01/11/2021 08:23 pm »

https://twitter.com/spacexfleet/status/1348742126964789249

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B1060 is now visible on the horizon!

A cruise ship is due to leave Port Canaveral at 5:15pm and it will be getting dark after 6pm.

Seems tight - but possible - to bring JRTI in tonight.

FutureSpaceTourist · « **Reply #155 on:** 01/11/2021 09:09 pm »

https://twitter.com/kyle_m_photo/status/1348753444337831943

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B1060.4 can be seen on the horizon. #SpaceXFleet #SpaceX

bsegal · « **Reply #156 on:** 01/12/2021 12:28 am »

Elizabeth S, Christine S, Hawk and another pilot boat outbound. Finn Falgout continues to make slow progress toward port entrance.

bsegal · « **Reply #157 on:** 01/12/2021 12:58 am »

B1060.4 and its entourage now entering port channel. Should be visible on Fleetcam shortly.

FutureSpaceTourist · « **Reply #158 on:** 01/12/2021 01:12 am »

https://twitter.com/kyle_m_photo/status/1348814833345564672

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B1060.4 is just barely in the port now. #SpaceXFleet #SpaceX

https://twitter.com/baserunner0723/status/1348814285477130240

FutureSpaceTourist · « **Reply #159 on:** 01/12/2021 01:14 am »

Quote from: bsegal on 01/12/2021 12:58 am

B1060.4 and its entourage now entering port channel. Should be visible on Fleetcam shortly.

Now visible

Edit to add:

https://twitter.com/spacecoast_stve/status/1348821343769415680

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Under the cover of darkness, #Falcon9 B1060 returns from her 4th flight (#Turksat5A) atop Just Read The Instructions.

With Jetty Park closing before arrival, I thought I’d utilize my favorite head-on spot. Tugboats never looked so cool. 😎