This is not in SIMBAD so I was wondering what it could be since it is close to LEDA 950093
However, I don’t think it is at the same distance since the z values are different. LEDA 950093 is z = 0.05460 where as this object is at z = 0.013+/-0.014 which is a pretty hefty error. So it could just be a star in our own galaxy.
Step 1 - check Gaia - under “imaging catalogs”, turn on the “Gaia EDR3 Catalog” overlay. This will show you Gaia-measured objects. If you hover over them, they will show you the measurements - in this case, “pmRA,Dec -1.3, -10.3 ± 0.6, 0.5 mas/yr, parallax 1.1± 0.5 mas”
Which means it has a measured motion of -1.3 +/- 0.6 milli-arcseconds per year in RA (1.3 / 0.6 ~ 2, so this is not definitely moving), and -10.3 +/- 0.5 mas/yr in Dec – 10.3/0.5 ~ 20 (signal-to-noise of 20), so this is definitely moving.
Yeah I realized that since the object showed up in different surveys, I should check more carefully before posting lol. IT also seemed too bright to be a supernova for this galaxy. With my background I should have known better
Yes, everything south of ~ Dec=+30 is from DECam on the Blanco.
(I think that pinkish halo is just because the images in some of the filters were taken in poor seeing conditions so the outer halo of the star is a weird color. The center is just saturated to white but if I used an SDSS-style saturate-to-a-color approach I bet it would look normal.)
I noticed that these objects all have higher z values than the galaxy itself. Yet with that many all following what looks like the arm of the spiral galaxy could be false positives or something. IT seems odd if you had that many objects in the background all lined up with a the foreground galaxy. I guess their redshift errors are also sizable.