I was going to say it could have been a meteor........but I am not going there.....
Buggered if I know, especially since its green, perhaps due to the 30 sec exposure, there might have been some equipment you have that got in the way, or even a plane's starboard nav light (perhaps not as it WAS 2:46am)
I was inside when the shot was taken, so I didn't see anything first hand.
If it was a plane, then it's strange as there is only one spot, 30 seconds would have gotten more spots from navigation lights. I have many photos of planes, they always have a trail of lights flashing on and off.
Taken with a 17-200mm lens, so no mirrors involved.
If it's a GLP, then it would have had to reflect off something, the chances of someone aiming a GLP at my lens from afar are unreasonably low. There is nothing to reflect off, see previous comments about planes.
Don't know about the Coppers, but I do know that the night vision cameras they use are IR thermal imaging cameras and don't have an external light source. Again the lack of running lights would concern me.
I have checked the previous and following frames, nothing there at all.
I'm starting to think something like a GRB?
There has to be an explanation, but it's probably terrestrial.
Anyone else out early Saturday morning in the Werribee region?
Hi Stuart,
Regarding the plane or helicopter idea, could it be that it only just entered the pic frame from the west as the last exposure was taken?
Molly.
Last time I saw something like this I though I had discovered a super nova Turned out not to be in the sky at all but an actual reflection within the imaging train. It could very well be a reflection caused by stray light source on to the glass of your lens. Someone walked past with a laser, or the neighbours light switched on and off. Anything really.
Police choppers fly around my area a bit and do have there lights off when needed. When they slew the camera you can definitely see a green light on the camera. my 2cents anyway..
Hi Stuart,
Regarding the plane or helicopter idea, could it be that it only just entered the pic frame from the west as the last exposure was taken?
Molly.
If that's the case it should be in the next frame, only a second or two between shots. Not there.
I really don't like the "something flying about" theories, more likely something turning on and off again.
Last time I saw something like this I though I had discovered a super nova Turned out not to be in the sky at all but an actual reflection within the imaging train. It could very well be a reflection caused by stray light source on to the glass of your lens. Someone walked past with a laser, or the neighbours light switched on and off. Anything really.
I don't think anyone walked past, it was quarter to three, let alone with a laser. This was taken in the onservatory, mounted on the G11, which would be about 500mm below the walls, so stray light would have to have entered from above the roofline of my next door neighbors house (which was in the frame until about an hour after starting. At least that's where Orion was, where the green dot was significantly higher in the sky, almost at zenith.
My GLP is at work, so it's not mine either.
I'll look closely for ghost reflections, which I have seen when capturing Jupiter in widefield shots. That may help.
Turned out not to be in the sky at all but an actual reflection within the imaging train. It could very well be a reflection caused by stray light source on to the glass of your 
