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Special Notice #127: Twilight observations of U Sco requested

October 15, 2008

Dr. Brad Schaefer requests evening twilight observations of U Sco from our southern hemisphere observers for as long as is practical, until U Sco disappears behind the Sun.  The campaign to monitor the recurrent nova U Sco (Alert Notice 367, January 22, 2008) continues, and observations of this object are needed.  U Sco is a fast nova, and detection and confirmation of any nova event need to occur over just a few hours if possible.  U Sco will be nearly impossible for much of the northern hemisphere, but southern observers may be able to continue observing in the early evening twilight for a few more weeks.  All observations, including "fainter-than" estimates are valuable, and please report all observations as soon as possible.  Any indication of outburst should be reported to immediately.

For more information about this campaign, please see the text of Alert Notice 367.

A page about the campaign has also been established here:

U Sco is located at RA 16:22:30.8 Dec -17:52:43 (J2000)

Custom charts and comparison star photometry tables for U Sco may be generated with VSP at the following URL:

Recent observations for U Sco are available at the following URL: 

Please report all observations promptly to the AAVSO as "U SCO".

This AAVSO Special Notice was prepared by Matthew Templeton.

Information on submitting observations to the AAVSO may be found at:


A Special Notice archive is available at the following URL:

Subscribing and Unsubscribing may be done at the following URL:
AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484