V482 Cyg

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  • #610449
    Gary Poyner
    Participant

    There is a suggestion that the RCB star V482 Cyg may be fading.  The star has been pretty much inactive since June 1996 when it faded to magnitude 13.0 and recovered to maximum brightness 12 months later (a deeper fade to magnitude 15.0 occured in 1990).  Since then there have been small amplitude variations of 0.5 mag either side of magnitude 11.0.   Latest magnitude in the AAVSO database is 11.9mv.

    Position 19 59 42.57 +33 59 27.9

    Charts are available from both BAAVSS and AAVSO.

    Further observations are requested.

    Gary

    #610450
    Paul G. Abel
    Participant

    Very interesting- thanks Gary! I’ll take a look if ever we get a clear sky! Tuesday is looking promising.

    Cheers,
    -Paul

    #610454
    Gary Poyner
    Participant

    Cloudy here in Birmingham last night/this morning, but clear at SLOOH Tenerife…

    V482 Cyg May 24.149UT 11.84CV
    V482 Cyg May 24.149UT 12.02TG

    Observations should be made every night if possible please, and reported to the BAAVSS as soon as possible. There is no way of knowing how deep V482 Cyg will go if it continues to fade, but observers should be careful of a close 13.7 mag star 7″ to the SW if V482 Cyg approaches mag 14.0

    Gary

    #610491
    Nick James
    Participant

    I mentioned this star during the Sky Notes at the BAA meeting in London today. Here is an image taken when I got home. It is unfiltered so the star is still quite bright. I assume that, a bit like R CrB, it will be quite red when it fades.

    #610493
    Gary Poyner
    Participant

    Thanks for mentioning it Nick. I’m looking forward to watching the meeting on YouTube over the weekend.

    V482 Cyg seems to have paused in it’s decline at the moment (according to V, mv values), but it’s worth keeping an eye on over the next few weeks to see what happens.

    I assume it will get redder as it fades, but it’s been so long since it did anything that there are only visual data covering the fades. Looking at the AID, the first V measures occured in 2000 and after.

    Gary

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