American Association of Variable Star Observers (AAVSO)
Sun, 09/05/2021 - 02:11

I'm doing some photometry runs and thought I would add V1655 Cyg but I can't seem to fine it. The finder chart shows the position but taking an image there is noting at the coordinates. Is this another one like V2500 Oph and has drifted away for its J2000 coordinate?




American Association of Variable Star Observers (AAVSO)
Very red -and faint- object

Hi Nor,
The position is correct and it is not a high proper motion star. You can check that if you look for the proper motion and parallax information in Gaia EDR3 (it is available through VizieR and you can use the VSX external link to get to it).

V1655 Cyg is a very red star and the range in VSX (12-14.8) is given in the I passband (infrared).
Looking at the star colours, its mean visual magnitude is around 20. The range is approximately 18 - 23 V.
So, depending on your limiting magnitude, filters used, and the phase the variable star is on its variability cycle (it may be near minimum), t is very likely that this faint object won't be visible on your images.