Is it a galaxy?
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by
arose513
Take a look at this picture. What do you think this is? Comment if you think you know what it is.
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by
ElisabethB
moderator
Hi arose513 and welcome to the Zoo,
This is most definitely a galaxy. It's a disk or spiral galaxy seen edge on. The red dot to the left of the centre is a foreground star from our galaxy.
Hope this helps and happy hunting !
Posted
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by
CeciliaB
At a closer look the small red object to the left of the center seems to be a thin red line changing to green as it stretches across the edgeon. Either it's an artifact or, since it is both red and green in a line, perhaps it could be a small transient changing colour during it's course. It's not present in Pan-STARRS.
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by
ElisabethB
moderator
Nice catch ! The red dot is indeed a red line, but I'm not sure it stretches out to a green line. But even so, the red line could indicate that it is an asteroid.
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In the seperate bands I see a regular small rectangular artifact in r band just above the red line.
Red line is only visible in i band and runs through the complete galaxy, with one difference; on the left side it is 'bright'' (red) and on the right side it is dark. Never seen such a fast asteroid in SDSS before, perhaps another rarer type of artifact?
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by
CeciliaB
Interesting! Thanks to both of you!
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