Friday imaging artifact quiz

[MattJenko]

It took me a little while to work this issue out. Can anyone else tell what caused these horizontal spikes, which only appeared in 2 consecutive subs out of 30?

[Starlight 1]

I can see horizontal spikes in all the Stars so I go with car lights.

[JamesF]

Overhead cabling, perhaps?

James

[Cath]

or maybe a blooming CCD ? .. if you were using a CCD sensor at the time

Spiders web?

[Alien 13]

Washing line wafting in the wind.

Alan

[MattJenko]

Nothing gets past this forum. Telephone lines are the culprit. Didn't think twice about them till I looked at the subs. Don't normally take images from the front of the house, main road, security, car lights, etc etc, but had a go this week. Took me a while to realise what the spikes were from. The slight vertical spikes seem to be artefacts from my refractor, and I suspect they are objective clips, but I haven't conclusively proved it.

[JamesF]

You could cut an aperture mask small enough to cover up the objective clips and see if the spikes go away.  That would be a fairly good indicator that they were causing the effect, I guess.

James

[Syed Saif Alam]

Tree branch maybe ??

[glowingturnip]

I have a small power cable that goes over my imaging site, just north of zenith.  I've been lucky enough not to have imaged through it yet (I think), but now I know what to look for !