Special Notice #22: Bright New Variable in Cassiopeia

October 31, 2006

Daniel W. E. Green, Central Bureau for Astronomical Telegrams, reports (Central Bureau Electronic Telegram 711) that S. Nakano, Sumoto, Japan, reports the discovery of a brightening star in Cassiopeia by Akihiko Tago, Ayabe, Tsuyama, Okayama-ken, Japan. Unfiltered CCD observations by Tago include October 25.538 UT, 10.7; 27.409, 10.5; 30.411, 8.8; 31.469, 7.5. Tago used a 70-mm f/3.2 lens and a Canon EOS 20Da digital camera (limiting magnitude 12).

Tago adds that a star of magnitude 11.8, which did not show variability in his earlier images and which he identifies as GSC 3656-1328, is located very close to the new object's position of:

R.A. = 00h 09m 21.81s, Decl. = +54o 39' 43.8" (2000.0)

According to Green, apparently the GSC star is the same as listed in the USNO-A2 catalogue as 1425.00229853, having position end figures 22.00s, 44.0" and blue and red magnitudes 11.9 and 11.3, respectively.

A search at AAVSO of SIMBAD, the GCVS+NameLists, and VSX showed nothing variable close to the position of the new object.

Visual, PEP, and CCD coverage is requested; photometric observers should use a V filter if possible.

The position of the object lies within the field of the 'a' scale AAVSO chart for R Cas. The comparison star magnitudes on this chart go to 7.5, so they may be used while the object is so bright. The chart is at:

obsolete link: [http://www.aavso.org/cgi-bin/searchcharts3.pl?name=r%20cas]

2016 link: https://www.aavso.org/vsp

Please report observations to the AAVSO as: 0004+54B VAR CAS 06. Also, be sure to indicate what chart/comparison star(s) you used.

Congratulations to Akihiko Tago on his latest discovery!

This special notice was compiled by: Elizabeth O. Waagen


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