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FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
Thread started 15 Dec 2015 (Tuesday) 01:12
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Identification of Object in Photo

 
Notquitesure
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Post edited over 3 years ago by Notquitesure.
     
Dec 15, 2015 01:12 |  #1

Hi there,

I assume what I'm looking at is the trail of a plane, but it isn't present in any photos around the exposure shown. The camera was set to 13 second shutter speed with next frame taken immediately afterwards. I took a timelapse of roughly 15min and this is the only exposure the trail shows up. The other two photos show the frame immediately before and after the trail showed up.

Frame prior 10:26:39pm:

IMAGE: https://farm6.staticflickr.com/5629/23466048050_5dcb3097e8_c.jpg
IMAGE LINK: https://flic.kr/p/BKBC​xm  (external link) IMG_0276 (external link) by JR (external link), on Flickr

Exposure with trail 10:26:52pm:

IMAGE: https://farm1.staticflickr.com/725/23393796569_4912038b35_c.jpg
IMAGE LINK: https://flic.kr/p/BDej​Ga  (external link) IMG_0277 (external link) by JR (external link), on Flickr

Frame after 10:27:05pm:

IMAGE: https://farm6.staticflickr.com/5814/23393796319_f3dc62884e_c.jpg
IMAGE LINK: https://flic.kr/p/BDej​BR  (external link) IMG_0278 (external link) by JR (external link), on Flickr

Any identification would be appreciated. There is an air station located at cherry point which is near the lighthouse. My guess would be some sort of aircraft but I'm not sure. I know someone here will probably be able to identify it immediately.

Thanks,

JR

http://james-callison.com (external link)

  
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rrblint
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Dec 15, 2015 01:18 |  #2

Did you have a filter on the lens?


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Notquitesure
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Dec 15, 2015 01:22 |  #3

No filter was on the lens. Camera was just on a tripod for a short timelapse/startrail image, also no form of tracking was used.


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Nogo
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Dec 15, 2015 01:43 |  #4

I would think it was a moth flying by or something like that.


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rrblint
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Dec 15, 2015 01:46 |  #5

It looks to me like a reflection of the lighthouse beam as it comes around. the curvature and broken areas of light and shadow match very well the lighthouse cage around the top.


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Notquitesure
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Dec 16, 2015 11:04 as a reply to  @ rrblint's post |  #6

Ahh, that looks like it could be the answer. Weird that it didn't show up in any other frames though as the light is a constant rotating beam.


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rrblint
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Dec 16, 2015 13:10 |  #7

If I'm correct, it would only show on frame when the light is shining on camera side.


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Dec 16, 2015 14:10 |  #8

Thanks again for the response. It only showed up in one of the frames from the timelapse sequence. The camera was in a fixed position on a tripod for the duration of the timelapse. The lighthouse has two constant rotating beams that flash every 15 seconds, so it would be strange for it to only show up on one frame out of the 100 taken.

Here's a link to a timelapse to show the entire sequence, begins at 10:25:33pm and ends 10:47:21pm.

Timelapse: https://flic.kr/p/BNzY​ky (external link)


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legoman_iac
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Dec 17, 2015 05:34 as a reply to  @ Notquitesure's post |  #9

Nice timelapse. My guess would be passing car or boat?


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Dec 17, 2015 05:53 |  #10

Looks like a low angle of a lighthouse with stars in the background. What do I win?


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Copidosoma
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Dec 17, 2015 18:36 |  #11

I would guess a bat or bird flying through the beam as it rotated. If it was anything specifically to do with the light it would show up every time the light rotated to that position.


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Notquitesure
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Dec 19, 2015 21:23 |  #12

Thanks for the responses everyone. I've taken quite a bit of night timelapse footage and haven't come across something quite like that in a frame. I didn't even think of a bird or bat being illuminated by beam and I do recall seeing some birds perched on the railing during a return trip.


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samsen
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Post edited over 3 years ago by samsen. (4 edits in all)
     
Dec 23, 2015 07:30 |  #13

I know very well how a plan tracing looks an No this is not one.
Because:
- Plane tracing is at infinity. You artifact has Out of focus blur, in addition to motion blur i.e. very close to camera that is focused at infinity as well seen through clear sky deal.
- Plans are slow moving objects even at lower altitude and you will never ever get one, only in one frame (Unless your shooting time is abnormally high then only it should appear and end from frame corner to corner /BG unless if timelapse has long delay between the image frames).

Absolutely not possible to be reflection of light house, due to lack of consistency of reproduction when everything else is constant.

I have done "Bird motion blur" at night and that comes as an oscillating tracing due to wing's uniform motion and again there is no reason for bird to be seen here when not lighted.

Nogo wrote in post #17819426 (external link)
I would think it was a moth flying by or something like that.

^^^ IMO the correct answer.
I see this often on my security camera's email sent "Motion detected alert" in summer nights:)


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skid00skid00
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Dec 25, 2015 13:49 |  #14

It's a 'flying rod', IE-an insect. You can see the bright areas where the wings reflected light to the camera a specific points in the wing stroke.




  
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Notquitesure
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Dec 27, 2015 09:06 |  #15

Thanks for the responses! I figured somebody up here had come across this before and could identify it because I was stumped. It's crazy what these camera sensors can pick up.


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Identification of Object in Photo
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