Skip to main content

Z UMI

Due to the New England winter storm currently affecting the area, phone coverage at the AAVSO may be much reduced until Wednesday. The staff is still available via email, and we suggest using that method to contact us if you need assistance.
RGN's picture
RGN
Offline
Joined: 2010-09-11

It appears that Z UMI is undergoing one of its deepest minima (below 18th mag). I have seen that there are a few observers that reguraly follows this RCB star. Since I have leraned that the minima are particularly important to determine the physical properties of RCB stars I wonder whether the AAVSO has given notice to professional astronomers and if there are some of them that are currently taking the spectrum of Z  UMI.

Gianluca

These deep minima are indeed
wel's picture
wel
Offline
Joined: 2010-07-26

These deep minima are indeed scientifically valuable - they allow a close examination of the environment of the R CrB variable when adaptive optics are used.

Cheers,

Doug

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484