Streak in IC 1396 in Cepheus

dah · Post by **dah** » Thu Sep 08, 2005 2:23 pm

There is a streak or two in the bottom of the high-resolution version of 08 September 2005 IC 1396 in Cepheus APOD photo. What caused them?

Malasorte · Post by **Malasorte** » Thu Sep 08, 2005 3:05 pm

That is really strange. The 3 streaks start from the bottom left of the image and continue to right margin of the image, cutting through the nebula. They are even visible even on the low resolution image.

There is no way those are very dim artificial satellites cutting through the image, it can't be 3 of them on the same time, besides the trails would be white not red.

http://www.astroclubul.org/emilneata - Deep Sky Astronomy

ddemartin · Post by **ddemartin** » Sat Dec 31, 2005 10:12 am

They are light trails left by an airplane during the red exposure.

Cheers,
Davide De Martin

nickwright · Post by **nickwright** » Thu Jan 05, 2006 6:12 pm

They're not light trails from aeroplanes, thats not possible. I'll check what they are.

nickwright · Post by **nickwright** » Fri Jan 27, 2006 11:09 am

sorry for the delay, i checked my original of the image and i think its a remnant from the mosaicing process, i really should have done a better job cleaning it up in photoshop!

harry · Post by **harry** » Fri Jan 27, 2006 10:48 pm

Something has caused those streaks.

There must be a better answer

makc · Post by **makc** » Mon Jan 30, 2006 7:19 am

that's laser beam, and this photo clearly proves alien wars. no, really, what do you want above author explanation?

nickwright · Post by **nickwright** » Mon Jan 30, 2006 10:46 am

sorry, its just a mosaicing artifact, its there on the original fits file

ddemartin · Post by **ddemartin** » Fri Feb 24, 2006 10:53 pm

No, they are not artifact in mosaicing. They are airplane trails left during the exposure of the red channel. I tryed to remove them with just partial success.
Nickwright, you checked your original?? But we are talking of one of my color compositions!
Cheers,
Davide

nickwright · Post by **nickwright** » Sat Feb 25, 2006 2:14 pm

Hi

Sorry, your image? I'm afraid that image is mine. I don't know who you are? There is no red channel in this image, its hydrogen-alpha and it is impossible for it to be air trails, planes do not fly over the site where we took the data.

nick

ddemartin · Post by **ddemartin** » Sat Feb 25, 2006 3:40 pm

We are talking of http://antwrp.gsfc.nasa.gov/apod/ap050908.html

Nick confused this image with one of yours.
Cheers,
Davide

BMAONE23 · Post by **BMAONE23** » Mon Feb 27, 2006 5:49 pm

While I was looking closely at the High Resolution image, I noticed that there are actually 2 red streaks with a central green streak. The red and green would typically be Port and Starboard wing marker lights on a jet. Further, Looking closely at the red streaks, they appear to rhythmically increase and decrease in brightness as they might if they were in fact wing marker lights that were slowly flashing on and off (as they do).

So they may in fact be wing marker lights of a passing plane.