Strange green blob long exposure

[WallFlowerActive]

I was capturing 30 second exposures for stacking images for star trails.

This little green guy popped up.  Nothing in the long exposure before or after.




Crop zoom of the green light.  It’s more like a blob.



I was taking photos by a busy road.  Might be light pollution or a reflection by a passing car? But the camera angle was at Polaris, angled a good distance above the road.


And with long exposures, you get a sense of direction.

Like these examples.
















There is also a sense of how fast the object is moving for a long 30 second exposure.

[imitator]

Cool images..
Looks like it was moving slow... the light appears slightly elongated, and has soft-edged light source.

Almost looks like two streaks... can see a star behind it.
Maybe its' a green LED, green laser, or the classic culprit... green aliens.

[Maxmars]

Please don't laugh at me....

What if there is a sizeable glass building somewhere nearby... it is reflecting some light source from it's surface towards the sky.... could that do it?

[BeyondKnowledge]

Please don't laugh at me....

What if there is a sizeable glass building somewhere nearby... it is reflecting some light source from it's surface towards the sky.... could that do it?

But what would be in the sky for it to then reflect off of. A reflected light is usually on a window. There is no window here.

No lense flair and no multiple reflections from a light shining into the camera lense.

This one is truly a puzzle.

[Maxmars]

Good question... mist, smog, a patch of fog?

I don't expect it will be that... but it's one more thing we can eliminate, I guess...

plus, I can't really discern even a "more or less" altitude guess.

[ArMaP]

Whatever it was it does appear to be moving relatively slow, unless it was moving away from or towards the camera, as the sense of velocity is relative to the camera's film or sensor plane, an object going directly in the camera's direction would appear as just one point of light.

To me, the most intriguing is the colour.