Skylon

SpaceX Discussion Thread

Recommended Posts

 

Share this post


Link to post
Share on other sites

Now that's impressive! I need to see that! Unfortunately it is probably going to be cloudy for a while and we are currently under a tornado watch. Also, both of the satellite tracking websites I visited don't list Starlink yet.

Share this post


Link to post
Share on other sites
1 hour ago, Ultimate Steve said:

Now that's impressive! I need to see that! Unfortunately it is probably going to be cloudy for a while and we are currently under a tornado watch. Also, both of the satellite tracking websites I visited don't list Starlink yet.

They're in darkness while they pass over N. America, still. Next time, maybe.

Share this post


Link to post
Share on other sites

I've noticed that on every launch I've watched.  But since everyone was always saying everything was nominal, I figured it was normal.

Share this post


Link to post
Share on other sites
16 minutes ago, CatastrophicFailure said:

Always wondered this myself...

 

 

 

 

Entrained exhaust gases were also visible around the first stage of Saturn V:

s68-29733-crop.jpg?w=816

Share this post


Link to post
Share on other sites
32 minutes ago, cubinator said:

They're in darkness while they pass over N. America, still. Next time, maybe.

Would they be visible at 10:30 given a sunset time of 8:26? There's a good pass at ~45 degrees elevation for me.

Share this post


Link to post
Share on other sites
Also shuttle. Bottom of main tank got really scorched every time. High pressure at the front, low at the back, except the exhaust itself.
Just now, Ultimate Steve said:

Would they be visible at 10:30 given a sunset time of 8:26? There's a good pass at ~45 degrees elevation for me.

What software is showing the passes right now?

 

Share this post


Link to post
Share on other sites
Just now, tater said:

Also shuttle. Bottom of main tank got really scorched every time. High pressure at the front, low at the back, except the exhaust itself.

What software is showing the passes right now?

 

Two line elements shown here:

http://www.satobs.org/seesat/May-2019/0207.html

Google "TLE converter," click first result, plug in lat/long, the two numbers, click load TLE, scroll down and click the 24 hour button.

Share this post


Link to post
Share on other sites

Yeah, I wanted to load the TLE and plot them. Was hoping an online viewer like Heavens Above would have it...

OK, I got the app on my computer (SatObserver) to load the TLE. I tried earlier right after I posted the tweet, and it didn't seem to load, and closed the app. Brought it back up, and it was already selected.

 

Might see the next pass, actually.

Share this post


Link to post
Share on other sites

Back of the envelope equations suggest that if the sats were directly overhead, they would be visible up to a bit past an hour after sunset. However, they aren't going to be directly overhead, but that math gets complicated. Two hours is probably a bit much to see them tonight, but if the clouds clear up I will try!

Share this post


Link to post
Share on other sites
Posted (edited)

Someone on Twitter had an interesting thought that is quite relevant here- could this satellite constellation bring the next generation of Iridium flares (Starlink flares, I guess)? I mean, I guess we don't really know the reflective qualities of these spacecraft, do we?

Edited by ThatGuyWithALongUsername

Share this post


Link to post
Share on other sites
2 minutes ago, ThatGuyWithALongUsername said:

Someone on Twitterhad an interesting thought that is quite relevant here- could this satellite constellation bring the next generation of Iridium flares (Starlink flares, I guess)? I mean, I guess we don't really know the reflective qualities of these spacecraft, do we?

Not yet.

Had a tornado watch today, with warnings close by, so clouds prob won't clear up.

Share this post


Link to post
Share on other sites

No dice, clouds were only thin enough to see a few of the brightest stars. And the lightning, of course.

Share this post


Link to post
Share on other sites

I forgot to set an alarm.

Share this post


Link to post
Share on other sites
6 hours ago, ThatGuyWithALongUsername said:

Someone on Twitterhad an interesting thought that is quite relevant here- could this satellite constellation bring the next generation of Iridium flares (Starlink flares, I guess)? I mean, I guess we don't really know the reflective qualities of these spacecraft, do we?

I'm more concerned what this constellation is going to do to long exposure wide angle night sky photography. They might paint a massive grid on every photo. I expect some uproar in the Cloudy Nights community.

Share this post


Link to post
Share on other sites
1 hour ago, Shpaget said:

I'm more concerned what this constellation is going to do to long exposure wide angle night sky photography. They might paint a massive grid on every photo. I expect some uproar in the Cloudy Nights community.

As long as it's not too close to dusk or dawn they shouldn't be visible.

Share this post


Link to post
Share on other sites

Look at the recovered fairings:

No acoustic mitigation (foam).

Foam absorbs water. Easier to reuse? (HT: NSF thread)

Share this post


Link to post
Share on other sites

The fairings look odd...as if they are metallic.

Share this post


Link to post
Share on other sites
20 minutes ago, Brotoro said:

The fairings look odd...as if they are metallic.

The nose is. They've been adding shiny metal for a while now.

Share this post


Link to post
Share on other sites

Share this post


Link to post
Share on other sites
26 minutes ago, tater said:

The nose is. They've been adding shiny metal for a while now.

I hadn't noticed that. Thermal considerations?

Share this post


Link to post
Share on other sites
4 minutes ago, StrandedonEarth said:

I hadn't noticed that. Thermal considerations?

Presumably.

I haven't checked which launches have had them, and which have not. perhaps it relates to recovery (those with recovery hardware have it?).

Share this post


Link to post
Share on other sites

 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.