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  #21  
Old 20-09-2018, 02:32 PM
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The bright streaked one on mine is Canopus. Mine was ISO32000 or something to have a reasonable chance hand-held
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  #22  
Old 20-09-2018, 02:38 PM
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Quote:
Originally Posted by DarkArts View Post
Thank you. Your report was received, but it was nothing. What you saw was swamp gas and a temperature inversion layer, nothing more. Now, please look into this light ...
Im near Russell orifices now - do you need a signed waiver?
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  #23  
Old 20-09-2018, 03:07 PM
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Quote:
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Thank you. Your report was received, but it was nothing. What you saw was swamp gas and a temperature inversion layer, nothing more. Now, please look into this light ...
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  #24  
Old 20-09-2018, 03:09 PM
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Everyone relax. Gandalf has been blowing smoke rings.
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  #25  
Old 20-09-2018, 04:16 PM
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My good friend (from another forum) pointed out another possibility.
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  #26  
Old 20-09-2018, 05:36 PM
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Nothing seems to of gone up or come down from all the sites that report.


https://en.wikipedia.org/wiki/Orbital_station-keeping


Pretty cool to catch one isn't it ?
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  #27  
Old 20-09-2018, 06:41 PM
Cimitar (Evan)
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Okay, here's the platesolve for the object we saw early this morning
The object is well below Canopus by this stage, however, as LewisM rightly pointed out the object first appeared close to Canopus.

I took this image at 12.47am on 20 Sept. View is towards SE.
Exposure details are:
Canon 600D
f/4.5, 34mm
ISO-6400, 20sec

I'm currently building a couple of GIF animations
Cheers, Evan
Attached Thumbnails
Click for full-size image (IMG_5640.jpg)
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Click for full-size image (PlateSolved.jpg)
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  #28  
Old 20-09-2018, 07:05 PM
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Thanks Evan. Glad I was not the only one to see it.
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  #29  
Old 20-09-2018, 07:10 PM
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OK...

So, knowing the distance between observers and image scale (should be known from plate solver) we can measure angular distance of object (~22 as per attachment) and calculate distance.


Very rough estimation is H=d/(2*tg(alpha)) = ~1540km.
The actual distance is smaller, as I did not take into account the height above horizon..... was it ~11? or more?
Gunnedah is at 31....
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Last edited by bojan; 20-09-2018 at 07:24 PM.
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  #30  
Old 20-09-2018, 07:43 PM
Cimitar (Evan)
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Here's my first GIF animation attempt (sorry, I really had to compress it to get the filesize below 200kB).

The object was moving pretty quickly. There's 4 frames in this GIF, and I just checked time between first shot (12.47am) and last shot (12.49am)
My next GIF will be as it approaches the horizon.
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  #31  
Old 20-09-2018, 07:44 PM
Cimitar (Evan)
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Quote:
Originally Posted by bojan View Post
OK...

So, knowing the distance between observers and image scale (should be known from plate solver) we can measure angular distance of object (~22 as per attachment) and calculate distance.


Very rough estimation is H=d/(2*tg(alpha)) = ~1540km.
The actual distance is smaller, as I did not take into account the height above horizon..... was it ~11? or more?
Gunnedah is at 31....
Sorry, yes latitude for Gunnedah is 31 S, and the approx. height of the object when that platesolve image was captured was 13-14.
Cheers, Evan

Last edited by Cimitar; 20-09-2018 at 08:38 PM.
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  #32  
Old 20-09-2018, 08:06 PM
Cimitar (Evan)
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I can't get the filesize below 200kB for the second GIF, so I'm attaching the individual files. If anyone knows how to convert it so it still looks fine that would be fantastic! If you want the larger RAW files just let me know

Time difference between first and last frame is 2mins
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Click for full-size image (IMG_5644.jpg)
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Click for full-size image (IMG_5645.jpg)
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Click for full-size image (IMG_5646.jpg)
28.6 KB31 views
Click for full-size image (IMG_5647.jpg)
28.6 KB29 views
Click for full-size image (IMG_5648.jpg)
28.6 KB29 views
Click for full-size image (IMG_5649.jpg)
28.7 KB25 views
Click for full-size image (IMG_5650.jpg)
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Click for full-size image (IMG_5651.jpg)
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  #33  
Old 20-09-2018, 08:31 PM
Cimitar (Evan)
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This is a stack animation of 11 images, crop/zoom to show only the object.
The donut shell appears to be expanding over several minutes.

1st frame was taken at 12.47am, and the last frame was captured at 12.51am
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  #34  
Old 20-09-2018, 08:35 PM
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Quote:
Originally Posted by Cimitar View Post
I can't get the filesize below 200kB for the second GIF, so I'm attaching the individual files.
What input format did you use? GIFs are typically created from JPG or PNG so you could compress the input images before making the GIF, with some loss of detail. Compressing when making the GIF wouldn't achieve much unless you used uncompressed bitmaps as input.

But ...

If you're logged in, open the first image and, at the RHS top of the screen is a navigation panel; cycle through the images once then just click the right arrow quickly and you get the same effect as a GIF.

If you're logged out, click the first image and cycle through the images slowly clicking 'next'. Once you've gone through once, click 'next' fast for the GIF effect.
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  #35  
Old 20-09-2018, 08:46 PM
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Hmm ..

Because object is moving pretty fast, to calculate the distance based on triangulation from Lewis's and your image will be much harder.
However, we can assume the object is in (circular) orbit... so that alone can enough.
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  #36  
Old 20-09-2018, 09:52 PM
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Really cool capture guys.

I recently posted a question asking what people had seen. I was photographing lagoon nebula and while going through my subs I noticed a small disc / black dot go across my frames, change direction, go around the nebula then continue in a statight line again. Total time to cross the image was nearly 8 min. I'm using an f10 5" SCT so it's quite a small feild of view. In my mind, taking that long to travel across the feild confused me and I thought ruled out anything terrestrial but the change of direction is what really got me thinking...... Nobody has given me any real thoughts on what it might be short of a very tiny bug on my sensor, but again.... 8 mins ????
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  #37  
Old 20-09-2018, 11:02 PM
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Seen something like that before it's definitely a rocket stage from some launch.
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  #38  
Old 21-09-2018, 07:42 AM
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There was a launch yesterday "Long March 3b/yz | BelDou-3 M13 & M14" from Xichang Satellite Launch Centre, China at 12.07am EST 20/09/2018.
I suspect it may have been from that maybe. That was the only launch around that time..
Thanks
Andrew...
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  #39  
Old 21-09-2018, 07:46 AM
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Thanks Lewis, Evan et al for this thread. I haven't had the privilege to see something like that yet, must be an interesting sight
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  #40  
Old 21-09-2018, 02:02 PM
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Quote:
Originally Posted by VPAstro View Post
There was a launch yesterday "Long March 3b/yz | BelDou-3 M13 & M14" from Xichang Satellite Launch Centre, China at 12.07am EST 20/09/2018.
I suspect it may have been from that maybe. That was the only launch around that time..
Thanks
Andrew...
I was just looking at this during my lunch break. I couldn't easily locate a flight path, however, I think you may have found our missing spacecraft
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