Unusual Objects in Orion
Posted: Thu Jan 14, 2010 5:25 am
Folks,
Monday night (2010.01.11) while imaging a region near Orion's belt with a DSLR, I captured an image of that included 'new' two very bright 'stars'. The odd thing about the 'stars' is that they only appear in 1 of 31 two minute frames captured over an our or so. Camera was on a tracker. 'Stars' were stationary with respect to the FOV. Iridium flares seem unlikely. At this point, the best explanation so far suggests up that I captured the strobe of a low flying aircraft (there is an small airport about 2 miles from the location where I captured the images). Equipment used to capture the images as follows:
Unmodified Canon 40D
TT320X Star Tracker
70-200mm Lens with Hutech LPS Filter (I live in a light polluted area)
Aperture was f/5.0 and focal length was set at 200mm.
ISO setting on the DSLR was 3200
Links to the three images:
http://www.flickr.com/photos/46558032@N04/4273568402/
http://www.flickr.com/photos/46558032@N04/4272824383/
http://www.flickr.com/photos/46558032@N04/4272824547/
Image 1 was acquired starting at about 9:28 PM EST
Image 2 (frame with bright 'stars') was acquired starting at about 9:30 PM EST
Image 3 was acquired starting at about 9:32 PM EST
Images were compressed to make more suitable for posting. No other image processing was performed external to the DSLR.
Any thoughts from the members of this board will be appreciated.
Shawn
Monday night (2010.01.11) while imaging a region near Orion's belt with a DSLR, I captured an image of that included 'new' two very bright 'stars'. The odd thing about the 'stars' is that they only appear in 1 of 31 two minute frames captured over an our or so. Camera was on a tracker. 'Stars' were stationary with respect to the FOV. Iridium flares seem unlikely. At this point, the best explanation so far suggests up that I captured the strobe of a low flying aircraft (there is an small airport about 2 miles from the location where I captured the images). Equipment used to capture the images as follows:
Unmodified Canon 40D
TT320X Star Tracker
70-200mm Lens with Hutech LPS Filter (I live in a light polluted area)
Aperture was f/5.0 and focal length was set at 200mm.
ISO setting on the DSLR was 3200
Links to the three images:
http://www.flickr.com/photos/46558032@N04/4273568402/
http://www.flickr.com/photos/46558032@N04/4272824383/
http://www.flickr.com/photos/46558032@N04/4272824547/
Image 1 was acquired starting at about 9:28 PM EST
Image 2 (frame with bright 'stars') was acquired starting at about 9:30 PM EST
Image 3 was acquired starting at about 9:32 PM EST
Images were compressed to make more suitable for posting. No other image processing was performed external to the DSLR.
Any thoughts from the members of this board will be appreciated.
Shawn