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Special Notice #176: Possible Nova in Scutum [V496 Sct]

AAVSO Special Notice #176

Possible Nova in Scutum
November 9, 2009

CBET #2008 (D.W.E. Green, editor) announced the discovery of a possible nova in Scutum [V496 Sct] on November 8, 2009. The new object was discovered by Hideo Nishimura (Miyawaki, Kakegawa, Japan) on 2009 Nov 8.37 UT (JD 2455143.87) who found the object near magnitude 8 on an image taken with a 120-mm camera lens and DSLR. The new object has since been confirmed by E. Guido and G. Sostero using a Global Rent-a-Scope telescope near Mayhill, New Mexico, USA on 2009 Nov 09.08 UT (JD 2455144.58).  Guido and Sostero report an unfiltered magnitude of 8.5, and provide the following astrometry of the new object:

        RA: 18:43:45.57 , Dec: -07:36:42.0 (J2000)

Guido and Sostero also note that there is no unambiguous progenitor candidate down to a limiting red magnitude of 20 present on DSS images of the field.

The object has not yet been confirmed spectroscopically as a nova, although such a classification is presumed.  Pending final classification, please submit all observations of this object to the AAVSO using the VSX designation "VSX J184345.5-073642".

An Alert Notice [AAVSO Alert Notice 412] will be issued if the object is confirmed as a nova.

This AAVSO Special Notice was prepared by M. Templeton.

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