Wow! Will be very interesting to see how your artifact rejection software handles it, and whether the "saturn" section comes out ok on the final image.
It cleaned up nicely, Mike, but I had to give it some help. I drew white lines (max data value) over the top of all the trails in each sub with PixelMath. Once that is done they stack perfectly. A bit painful, though...
Two weeks ago, I tougth I was also having a problems with statelite or airplanes when shooting The HH, but then realized that the "trails" were difraction spikes of alnikak just outside of the frame
Two weeks ago, I tougth I was also having a problems with statelite or airplanes when shooting The HH, but then realized that the "trails" were difraction spikes of alnikak just outside of the frame
I should be grateful I didn't have that problem as well, Geert
that's what? 9+ hours of exposure, over more than one day? I guess that's probably a lot of the same ones coming through each evening.
It looks like you need to start later at night to try and avoid this nuisance factor, which is only going to get worse sadly.
Wonder if anyone else here has similar photos and just haven't bothered to post.
Certainly you don't notice many naked eye because they are so small. But point a telescope at the right patch of sky after sunset and it is amazing how many cross the field. I find the Southern Cross/Eta Carina area at certain times of the year to be one such place.
But thanks for sharing this Rick. It's really enlightening.
Trev
that's what? 9+ hours of exposure, over more than one day? I guess that's probably a lot of the same ones coming through each evening.
It looks like you need to start later at night to try and avoid this nuisance factor, which is only going to get worse sadly.
Wonder if anyone else here has similar photos and just haven't bothered to post.
Certainly you don't notice many naked eye because they are so small. But point a telescope at the right patch of sky after sunset and it is amazing how many cross the field. I find the Southern Cross/Eta Carina area at certain times of the year to be one such place.
But thanks for sharing this Rick. It's really enlightening.
Trev
Hi Trev,
ny2o.com is currently tracking 17561 objects and a lot of them are geostationary satellites, so I guess the surprising thing is that we don't see more of them in our subs You need to be imaging around Dec +4 to +6 to see them from here.
Had an acquaintance who used to say he watched the Geo-stationaries naked eye some nights. yeah, right? He wasn't at all into astro things, so had no idea where to look, just used to be able to spot them.
Chuckle.
l don't think the thick bands are satellites,too
many of them,also some trails split of making
V shapes,must be another reason behind these lines.
This represents the trails through 12 hours of data in a very busy part of the sky so I don't think another explanation is needed. The "V" trails don't appear in individual subs. They are a superposition of trails from separate subs.
From Brisbane, all of the geostationary satellites have declinations around +4 to +6 degrees
Yes, it's pretty busy in the geostationary zone. Here's a recent M61 rejection map showing 4 or so satellites (over 1.5 hrs), at about +4.6 declination and about due north.
In fact, looking carefully at the rejection map I also found 3 faint asteroid tracks !
Interesting stuff even in the data we normally throw away !
I never would have thought of looking at rejection maps for asteroids, rarely pay much attention to them other than to quickly check how much stuff has been rejected.
You need to be imaging around Dec +4 to +6 to see them from here.
