Planetary nebula?

Is this a planetary nebula?

It looks like an internal reflection.

Here is another, which is clearer.

Internal reflection in DECaLS dr5, gone in dr8

You are seeing internal reflection within the telescope. It is even more confusing if you zoom out. The 4 dark lines is the “spider”, the arms that hold up the secondary reflector. The reflection is probably caused by a nearby bright star, which has been blacked out in dr5.

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This doesn’t look like an internal reflection to me. Try looking at the same star in DR7.

I would really like it to be a planetary nebula :slight_smile:
but there are similar artifacts to the west and east :frowning:

Maybe caused by Arcturus

Hmmm… you are right. I didn’t spot those! On with the hunt…