Author Topic: SpaceX F9 : Starlink 4-1 : SLC-40 : November 13, 2021 (12:19 UTC)  (Read 62760 times)


Online wannamoonbase

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Congratulations SpaceX on what appears to be a flawless flight and a return of east coast Starlink flights. 

The rest of the 2021 Manifest looks like it could finish strong. Hopefully there can be 1 or two more Starlink flights before 12/31

[Discussion continues in the manifest discussion thread here: https://forum.nasaspaceflight.com/index.php?topic=52191.msg2310278#msg2310278]
« Last Edit: 11/14/2021 07:16 pm by zubenelgenubi »
Superheavy + Starship the final push to launch commit!

Offline SPKirsch

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« Last Edit: 11/13/2021 01:09 pm by SPKirsch »

Offline JuaniX

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Any mention of launch time to the second or microsecond?

https://twitter.com/cbs_spacenews/status/1459496222985707521
Using that tweet, SpaceX' livestream and my eyes:

12:19:30      Lift-off
12:20:45      MaxQ
12:22:06      MECO
12:22:10      Stage separation
12:22:17      SES-1
12:22:31      Fairing deploy
12:26:16      Entry burn
12:28:07      1st stage landing (~)
12:28:29      SECO-1
12:35:15      Starlinks deploy

In case anyone's interested. Oh, time is UTC.

Edit2: Now they are correctly calculated.
« Last Edit: 11/13/2021 06:03 pm by JuaniX »
Lanzamientos Espaciales - Launch calendar in Spanish, and further info on spaceflight
https://lanzamientosespaciales.com

Online Rondaz

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Offline OneSpeed

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Here is a comparison of the Starlink L28 and 4-1 mission telemetry.

1. These missions were to slightly different orbits. L28 flew to 550 x 167km at 53° inclination, and 4-1 to 540 x 215km at 53.2°.

2. Mission 4-1 had a payload of 53 satellites, 7 less than L28, but apart from the insertion altitude at perigee, the profiles are similar, implying a similar, but probably slightly lower total payload mass.

3. Each Starlink v1.0 from L28 has a mass of 260kg, so for the total payload to be the same, the laser equipped Starlink 1.5s from 4-1 would have needed to weigh about 294kg each. Does anyone have a better figure for the Starlink 1.5 mass?

Offline Elthiryel

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These missions were to slightly different orbits. L28 flew to 550 x 167km at 53° inclination, and 4-1 to 540 x 215km at 53.2°.

According to what I have been able to find, the insertion orbit for Group 4-1 was around 337 x 211 km, while for L28 it was around 282 x 258 km.

Sources:
https://twitter.com/TSKelso/status/1459722955261296640
https://twitter.com/TSKelso/status/1397942109169086465
GO for launch, GO for age of reflight

Offline OneSpeed

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According to what I have been able to find, the insertion orbit for Group 4-1 was around 337 x 211 km, while for L28 it was around 282 x 258 km.

Thanks, you are correct. I'd forgotten that for L28 there was a second S2 circularisation burn, raising the perigee. The higher insertion for 4-1 probably meant a second S2 burn was not required.

I'd still be interested to know the mass of Starlink 1.5 though.

Offline zubenelgenubi

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Any news about the fairing recovery?
Support your local planetarium! (COVID-panic and forward: Now more than ever.)
My current avatar is saying "i wants to go uppies!"

Online Rondaz

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Is there an ETA on the Starlink 4-1 booster return? Or did I miss that update lol?

https://twitter.com/analoguepilot/status/1460035665891151874

Only just leaving LZ ... :(

https://twitter.com/SpaceOffshore/status/1460036731370151943

Online Rondaz

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Crew mission didn't have fairings. Bob is still quite a ways out with the Starlink fairings. Probably traveling with JRTI and Finn.

https://twitter.com/julia_bergeron/status/1460061336256270336

Offline SPKirsch

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https://twitter.com/SpaceOffshore/status/1460372874980737029
Quote
JRTI droneship, Bob and Finn Falgout have departed the Starlink LZ and are en-route to Port Canaveral. I think Finn is towing JRTI.

Early arrival estimate Wednesday/Thursday.

Online Rondaz

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JRTI droneship and B1058 are progressing towards Florida. Estimating arrival around dawn on Thursday 18th.

Bob is alongside and should have both fairing halves.

https://twitter.com/SpaceOffshore/status/1460732352934645767

Offline SPKirsch

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https://twitter.com/julia_bergeron/status/1461043697131393032
Quote
Today marks 23 days at sea for Finn Falgout. The crew departed Port Canaveral to support Crew-3, handled some less than desirable sea states and then supported Starlink. They have JRTI in tow with B1058 and hopefully Bob will have fairings onboard when they all arrive tomorrow.

Online Rondaz

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JRTI, B1058 and the support fleet are closing in on Port Canaveral. Should hopefully be setting up for an arrival around dawn tomorrow.

https://twitter.com/SpaceOffshore/status/1461080051328372740

Online Rondaz

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B1058-9 has returned to Port Canaveral onboard Just Read the Instructions. I do believe this is the most scorched ninth flight booster I have seen. Join the chat with live views from the @NASASpaceflight Fleetcam.

https://twitter.com/julia_bergeron/status/1461326832146518019

Online Rondaz

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The port assist tugs are outbound to greet Finn Falgout and JRTI to bring B1058 in for processing. Bob has already returned with both fairing halves. I'm in Port Canaveral and the @NASASpaceflight Fleetcam will have views of arrival.

https://twitter.com/julia_bergeron/status/1461317344651882509

Online Rondaz

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More views of B1058's arrival to Port Canaveral.

Starlink 4-1 mission wrap-up by @MihirNeal for @NASASpaceflight
 

https://twitter.com/julia_bergeron/status/1461333246277468161

Online Rondaz

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Falcon B1058 returns to Port Canaveral after launching the latest batch of Starlink satellites.

This booster has now conducted nine successful missions.

https://twitter.com/NASASpaceflight/status/1461329470913228811

Offline SPKirsch

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Screenshot of the arrival of Bob with both fairing halves earlier today:
« Last Edit: 11/18/2021 07:23 pm by SPKirsch »

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