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Date: Sat, 14 Aug 1993 16:25:55 -0300
From: Mike Boschat <andromed>
Subject: BetaLyrae
From: <WDB3926@TAMZEUS.BITNET>
Subject: Beta Lyrae
Mike,
Mail this to others if you think that it's useful.
I have some data that I can send later.
Thanks,
Dan
Subject: Beta Lyrae "Watch an Evolving Binary Star"
In the June 1993 issue of _Sky and Telescope_ magazine John Isles
shows a light curve of Beta Lyrae made by naked-eye observations
made in 1987-88. Since this eclipsing binary system is evolving,
it is important to continue observations of this star. Mr. Isles
is collecting visual observations of Beta for the next few months
from readers of S&T.
If anyone would like to include their visual estimates in
the follow-up report, then measurements can be sent to:
(New Address) John Isles
1016 Westfield Drive
Jackson, MI 49203-3630
If you find email more convenient then please send measurements
to me at :
astro@tamu.edu
I will collect and forward results to him.
Beta Lyrae is fairly bright star and is easy to find near
Vega. The brightness goes through a 12.94 day cycle with two maxima
and two minima. Its unusual light curve is attributed to a toroidal disk
around the secondary star. For more information on this binary star
and how to observe it see page 72 of the June 1993 issue of S&T.
L Y R A
+----------------------------------------+
| | STAR MAGNITUDE
| | ========================
| e m |
| a | b beta 3.3-4.1
| z | g gamma 3.2
| d | z zeta 4.1
| |
| k | k kappa 4.3
| | m mu 5.1
| b |
| g |
| |
| |
+----------------------------------------+
I am also doing some photometry of this star in my spare time.
If any photometrist would like to collaborate on some observations,
then I would be glad to collect observations and place them on an
ftp site.
Sincerely,
Danny Bruton
astro@tamu.edu
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
