wxsatuser

On 10/08/2021 at 00:41, JamesF said:

Do you have a reference for the details of the satellite at all?  I posted in another thread that it sounded unviable as something visible to the unaided eye, so it would be interesting to find out exactly what they (the company that appear to be providing the satellite) are planning.

James

You will not find anything about it apart from it was supposed to be funded with Dogecoin.

Musk has talked up Dogecoin a few times so may be this tells some thing, calls himself the Dogefather.

On Saturday Night Live Musk called it a hustle, and howled, “to the moon,” a catchphrase used
by doge enthusiasts intent on getting the cryptocurrency to one dollar.

Make of this what you will, this I found looking around financial sites btw.

High flying birds like geese may reflect light and appear like a satellite.

Not saying it was a bird but it may explain a wobbly path and slow or speed up.

Never seen a satellite do anything unexpected and have seen the usual flares, blinking and going into eclipse.
I have seen large birds at vary heights when imaging and surprising how many fly at night.

Well done that is a keeper.

Have a look at this

https://skyandtelescope.org/astronomy-blogs/explore-night-bob-king/random-meteors-arent-random02112015/

It is excepted amongst us radio amateurs that the best time for random meteors is from midnight to about midday.

When I did meteorscatter I always tried to get skeds after midnight but you had to be quick to get in before the best slots were taken.

I have no idea if the speed matters but we definitely got more meteors in the hours just before and after sunrise.

We did not protest when Mr Brown dropped it to 15% but it did not last of course.

This one of my favourite objects as well and you have done it proud Peter.

I can assure you that us Brits know full well what VAT is and that it is in the price for consumers.

If a business deals mainly with businesses then prices will not have VAT.
If they deal with both businesses and consumers then the price will include VAT if not both prices should be displayed with equal prominence.

At work we deal with mainly businesses, when we quote prices to a business it is assumed there is no VAT added although we always quote the price plus VAT.
We do this because some unscrupulous firms try to catch you out by claiming the price you quoted is the lower price without VAT.

The arguments I have had with some of these chancers, they are just trying it on or are ignorant of the law.

Here is an image of the tropo signal with a satellite and just left of the tropo signal is a diverging signal, aircraft.

I would say aircraft.

I see these as well, often they appear along side the tropo signal that I receive direct off the GRAVES side lobes.

Normally they run parallel and then diverge off the main signal.

There are very few zoom lenses that can do better than that.

Just like scopes we need to spend an arm and leg to get a good one.

What is the zoom lens btw

On 27/07/2021 at 16:55, alacant said:

Perfect. So, like us you worked out for yourself what was best. You didn't get bogged down in theory.

There will be the armchair theorists who will tell you it is totally insane not to include dark frames in your calibration; they can't cope with pragmatism.

But wait. Can we generalise? No, of course we can't:

• Your 60D: bias only works fine.
• Our 700d: 1200d, 2000d and 4000d: bias only works best
• Our 450d: the only way we can control the banding is to use dark frames
• Someone else's dslr: until we've done your L+D etc, we don't know.
• My mate's asi294 at -5º: darks are essential

Hands on is perhaps the only way to go.

Just our €0,02

Cheers

Modern cameras have on sensor dark current suppression.

The 450D does'nt have it.

If your doing short exposures,  longer exposures may help, expose so the camera histogram peak is at least 25% from the left.

Cannot help with the filter but it may cause a reflection, may be some one else will comment on that.

Re diffraction spikes.
As you stop down they become more noticeable.
An even number of of blades gives the same amount of spikes, 4 blades 4 spikes.
An odd number of blades produces double the amount , 9 blades 18 spikes.

You either love or hate spikes, me I don't care, it's something we have to expect if we use camera lenses.

Can I just add, although your sort of correct there are two autofocus systems in Canon cameras.

The sensor autofocus only works in Liveview mode or in mirrorless cameras, I believe the whole sensor is used in dual pixel AF.
In view finder mode there is a dedicated autofocus chip, I would assume that one wouldn't use Liveview in AP.

Very good image with the new kit.

The halo seems odd, strange diffraction pattern across it, surprised that the Canon lens produced this.
Strange things can happen with bright stars but may be the halo is from the rest of the image train, filter may be?

Never had an issue with banding on both my 60Da, 7dmk2 or 6d, noise yes but no banding.

I believe it is C

Some way down this pdf, page 14 you will see the diagrams for the back focus.

https://s3.amazonaws.com/celestron-site-support-files/support_files/edgehd_whitepaper_final.pdf

At 20metres it's gotta be the mount.

I used two 60Da and you couldn't hear them 20feet away let alone 20metres.

On 11/07/2021 at 16:24, Alien 13 said:

At what altitude can you say you touched the edge of space? my best effort was on board a Korean airlines 747 flying over Russia at 52,000 feet due to the missile threat at the time, still got buzzed by a couple of Migs..

Alan

A 747's maximum ceiling is 45000feet and modern SAM missiles  go well above 52000feet anyway so it would'nt have mattered anyway.

As to Mr Branson, when he does an orbit and reentry then that will be different and worth doing.

Most graphics programs should allow you to insert text on an image.

It's amazes me that all this and more came from a single point.

No!

My 383 900sec dark -20

If you can manage it go for a more modern version, the later the better.

The later models have far better noise performance than the older models.