[AZ-Observing] Re: Delta Sco Fading

I have added delta Sco to my UBV PEP observing program.

Last night 10/11 May 2005 I made my first set of observations. I will 
be making more. I use a calibrated UBV PMT system. I used alpha Lib 
as the comparison star.

Alpha Lib assumed magnitudes V= 2.75, B= 2.86 and U= 2.95

Delta Sco Results
JD 2,453,501,8201
V= 2.028 SD= 0.006
B= 2.144 SD= 0.008
U= 1.262 SD= 0.018

Three sets of of program star measurements were made with three 
observations in each were bracketed by the comparison star reading.

I will be adding the data  and project to my web site.

Jeff

At 14:00 -0700 4/27/05, Tom Polakis wrote:
>Argentinian variable-star observer Sebastian Otero has noted that 
>Dschubba (Delta Scorpii) has been fading rapidly of late.  This is 
>the 2nd-magnitude star "at 2 o'clock from Antares" in the head of 
>the Scorpion.
>
>It brightened unexpectedly from its usual magnitude 2.2 by a half 
>magnitude late in 2002, and has fluctuated around magnitude 1.7 
>since.  In brightness it rivalled the rival of Mars.  Now it appears 
>to be fading back to its original level, but who knows for how long.
>
>More information on Otero's site at:
>
>http://ar.geocities.com/varsao/delta_Sco.htm
>
>The English version is about half way down the page.
>
>When I see Dschubba in print, it looks like a combination of the 
>unflattering nicknames for the current and most recent presidents: 
>Dubya + Bubba = Dschubba.  No?  Okay, maybe I've been working a bit 
>too hard lately.
>
>Tom

-- 
Jeff Hopkins
HPO SOFT
Hopkins Phoenix Observatory
http://www.hposoft.com/Astro/astro.html

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