[vsnet-chat 7294] Re: [baavss-alert] Delta Scorpii

[Peter F Williams]

Hi Colin and All,

Following Colin's below note, I have just checked Delta Sco under slightly
hazy conditions.  I have not been making regular estimates of this star,
being uncomfortable with the brightness and with the separation of the
comparisons.  It is, however, clearly superior to both Beta and Pi Sco,
brighter than Epsilon Sco but inferior to Lambda Sco.  It is clearly fainter
than Theta Cen and brighter than Iota Cen.  The stars of Cen are better
positioned at this time of night.

Based on the V mags
Lambda Sco 1.63
Epsilon Sco 2.29
Theta Cen 2.06
Iota Cen 2.75

My estimates:
Lambda Sco (9) v (1) Epsilon = 2.22
Theta Cen (5) v (5) Iota Cen = 2.41

Mean visual magnitude to an ambitious 2 decimals:
STAR		YYYYMMDD(UT)	MAG	OBSERVER

SCODELTA	20060518.465		2.32	WPX

This is in good agreement with Colin's observation.

Best wishes.

Peter Williams
Heathcote NSW


-----Original Message-----
From: baavss-alert at yahoogroups.com
[mailto:baavss-alert at yahoogroups.com]On Behalf Of henshawcolin
Sent: Thursday, 18 May 2006 7:25 PM
To: baavss-alert at yahoogroups.com
Subject: [baavss-alert] Delta Scorpii


Delta Scorpii was observed on May 16th at 2m.3, which is very close to
its normal brightness. This suggests the the outburst may be over. Two
years ago from Saudi Arabia I was observing it at around 1m.8, about
equal to Epsilon Sagittarii. Now it is fainter than Theta Centauri.

Colin Henshaw








------------------------ Yahoo! Groups Sponsor --------------------~-->
Everything you need is one click away.  Make Yahoo! your home page now.
http://us.click.yahoo.com/AHchtC/4FxNAA/yQLSAA/d_XolB/TM
--------------------------------------------------------------------~->

--------------------------------------------
Visit the BAA Variable Star Section web site at...

http://www.britastro.org/vss/
--------------------------------------------


Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/baavss-alert/

<*> To unsubscribe from this group, send an email to:
    baavss-alert-unsubscribe at yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/