I think I caught the ISS (or a flea on my objective)
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I think I caught the ISS (or a flea on my objective)
Anybody willing to confirm that this flea speck is the ISS? It does match the time and transit path. LOL
It's a 14MB video.
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Thanks,
Jack
It's a 14MB video.
80mm f6.5 refractor with 2x Barlow
Quark (negative 5 setting)
2x Barlow
ASI174
Thanks,
Jack
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Re: I think I caught the ISS (or a flea on my objective)
I think you got it! Slowing the image down it can be seen a bit easier. It's obviously something small moving fast in front of the sun.
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Re: I think I caught the ISS (or a flea on my objective)
Hooray!!!!
Explore Scientific 152mm f6.5 achromat
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Re: I think I caught the ISS (or a flea on my objective)
Lunt 8x32 SUNoculars
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Re: I think I caught the ISS (or a flea on my objective)
I'm having doubts...I look at Alexandra's amazing captures (stolen here without permission) and I look at mine...maybe the FOV is different, but heck...mine is too fast for a bird but too small for ISS it seems to me? But the time and the transit path match...I'm just not sure:
Alexandra's: Jack's:
Alexandra's: Jack's:
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Re: I think I caught the ISS (or a flea on my objective)
Hi Jack,
Could be and I guess now you know why it is important to know how the Sun depicts in your images and so the next time you can orient your FOV in such a way that you know where it is going to pass.
One thing you should not do is to try to chase it. Important is also to have a high frame rate.
Unfortunately these days there have not been much info on the Sun itself to get the correct orientation.
Perhaps next time. So far I have had only one succesfull ISS pass.
Just do not despair
This is a good page for predictions https://transit-finder.com/
Could be and I guess now you know why it is important to know how the Sun depicts in your images and so the next time you can orient your FOV in such a way that you know where it is going to pass.
One thing you should not do is to try to chase it. Important is also to have a high frame rate.
Unfortunately these days there have not been much info on the Sun itself to get the correct orientation.
Perhaps next time. So far I have had only one succesfull ISS pass.
Just do not despair
This is a good page for predictions https://transit-finder.com/
regards Rainer
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Observatorio Real de 14
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Re: I think I caught the ISS (or a flea on my objective)
Very debatable, Jack. On balance I would say not. I think it would have been larger and more defined had it been the ISS.
Stu.
Stu.
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Re: I think I caught the ISS (or a flea on my objective)
According to the info from Calsky in your previous post, the ISS is 30" in diameter. (size can vary a lot, but 30" is not that small)
Did the calculation right for an ASI174 but my figures seemed to large ....
Anyway 30" is in between the size of Mars and Jupiter, so should be clearly visible.
Paul
Did the calculation right for an ASI174 but my figures seemed to large ....
Anyway 30" is in between the size of Mars and Jupiter, so should be clearly visible.
Paul
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Re: I think I caught the ISS (or a flea on my objective)
If not the ISS then what would that object be that Jack caught quickly crossing the Sun? An insect? A bird?
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Re: I think I caught the ISS (or a flea on my objective)
Hi James,
It's quite common to see 'stuff' transiting across the field of view, usually birds from around the garden or other local areas. Sometimes balloons are seen transiting more slowly and with a well defined shadow. I suspect Jack's transit was a bird.
Stu.
It's quite common to see 'stuff' transiting across the field of view, usually birds from around the garden or other local areas. Sometimes balloons are seen transiting more slowly and with a well defined shadow. I suspect Jack's transit was a bird.
Stu.
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Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: I think I caught the ISS (or a flea on my objective)
That is a hard one Jack. It is a great pity that just before the transit you seem to have zoomed in? What you need to do is be as far out as you can and leave the camera still. Let the ISS track across. If you have a fast frame rate then you should have at least a few frames in focus as long as the Sun was in focus.
Out of interest, Calsky will give you a good indication of size. The size of the ISS will depend on how far away it is from you. For my transit the distance was 557km away and 0.7 sec transit. I then got another alert at the end of August and this time the transit was nearly 3 seconds long but it was more than 2000 km away. It wasn't worth it, it would be minuscule.
What was your distance?
Alexandra
Out of interest, Calsky will give you a good indication of size. The size of the ISS will depend on how far away it is from you. For my transit the distance was 557km away and 0.7 sec transit. I then got another alert at the end of August and this time the transit was nearly 3 seconds long but it was more than 2000 km away. It wasn't worth it, it would be minuscule.
What was your distance?
Alexandra
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Re: I think I caught the ISS (or a flea on my objective)
Thanks all. I artificially zoomed in using a post processing solution to get detail. My object was about a minute after published transit time so I went looking for it incase I was simply wrong in all my calcs.
I've seen many birds and this did not feel like a bird so then I wondered if this was a satellite of another kind.
Sadly, none of my other satellite tracking programs showed a satellite transiting.
I agree it is not the ISS.
ONWARD to the next transit.
Calsky does not show history, does it? I don't see a way to look at past events and check my calcs.
Cheers,
Jack
I've seen many birds and this did not feel like a bird so then I wondered if this was a satellite of another kind.
Sadly, none of my other satellite tracking programs showed a satellite transiting.
I agree it is not the ISS.
ONWARD to the next transit.
Calsky does not show history, does it? I don't see a way to look at past events and check my calcs.
Cheers,
Jack
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Re: I think I caught the ISS (or a flea on my objective)
Jack, yes it does. I presume you are on your personal calendar. Make sure your location is accurate in your settings.
Go to Calendar
Set the date, time and duration. Set the day and maybe pick 9am, then a duration of 12 hours. Go to your ISS transit and in the description it shows the distance.
Alexandra
PS Calsky is accurate to the second so a minute over will be long gone. Make sure you have your location accurate and your time zone accurate in your settings. I would probably think you missed it due to not imaging in the correct part of the Sun. If you have a next time, try and get the camera so you can image the full disc, then you can get your orientations correct. In the library we have some helpful guides to getting orientation correct and try and match it with Tilting Sun and GONG to get a good feel for where you are.
viewtopic.php?f=7&t=28249
Go to Calendar
Set the date, time and duration. Set the day and maybe pick 9am, then a duration of 12 hours. Go to your ISS transit and in the description it shows the distance.
Alexandra
PS Calsky is accurate to the second so a minute over will be long gone. Make sure you have your location accurate and your time zone accurate in your settings. I would probably think you missed it due to not imaging in the correct part of the Sun. If you have a next time, try and get the camera so you can image the full disc, then you can get your orientations correct. In the library we have some helpful guides to getting orientation correct and try and match it with Tilting Sun and GONG to get a good feel for where you are.
viewtopic.php?f=7&t=28249