Very blue point source -- Is it moving towards us?

This one looks a lot more blue than most stars. Could it be moving towards, due to blueshift? (Does that happen?) Or is it a quasar? Very equal brightnesses in all 3 bands.

http://legacysurvey.org/viewer?ra=0.5641&dec=0.5599&zoom=16&layer=decals-dr3&sources

Hi,

It could be a blue star, or perhaps a quasar. In this view,
http://legacysurvey.org/viewer?ra=0.5641&dec=0.5600&zoom=14&layer=decals-dr3&spectra
you can see two nearby blue sources with SDSS spectra: one is a high-mass (hot-burning) A star, the other a quasar at redshift 2.9.

High-velocity stars move at about 1000 km/s (or that ballpark), so produce only a tiny bit of blueshift.

cheers,
–dustin

Thanks for the explanation Dustin. This one looks pretty similar—maybe slightly more blue. Probably it’s also either a blue star or a quasar?

http://legacysurvey.org/viewer?ra=0.4921&dec=0.5552&zoom=16&layer=decals-dr3&sources