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AAVSO Special Notice #181: Possible Nova in Eridanus AAVSO HOME > publications > special notice

AAVSO Special Notice #181

Possible Nova in Eridanus
November 25, 2009

Central Bureau Electronic Telegram No. 2050 (Daniel W. E. Green, Ed.) 
announces the discovery of a possible nova in Eridanus, as reported by 
Hitoshi Yamaoka, Kyushu University, by K. Itagaki, Yamagata, Japan, at 
magnitude 8.1 on images taken Nov. 25.536 UT. The object was confirmed 
by Itagaki on an image taken on Nov. 25.545.

Coordinates: R.A. = 04:47:54.21  Decl. = -10:10:43.1 (equinox 2000.0)

According to CBET No. 2050, "Itagaki notes that there is a faint (mag about 
15) object near this position on his archival patrol images. Yamaoka 
suggests that it might be the brightening of a 15th-mag blue star that is 
contained in many catalogues (USNO-B1.0 position end figures 54s.19, 
42".9), noting that the amplitude of seven magnitudes is rather large for a 
dwarf nova, but somewhat small for a rapid classical nova.  Yamaoka adds 
that the ASAS-3 system (Pojmanski 2002, Acta. Astron. 52, 397) also 
detected this object at the following V magnitudes:  Nov. 10.236 UT, 
[14.0:; 19.241, 7.34; 22.179, 7.98; 24.269, 8.12."

Finder charts for this object may be plotted using VSP by entering the 
coordinates into the form at the URL 
http://www.aavso.org/observing/charts/vsp/.

This object has been assigned the VSX identifier VSX J044754.2-101043. An AUID will be assigned by the VSX moderators and will be added to the online
version of this notice when it becomes available. Please report 
observations to the AAVSO International Database as N ERI 2009 or 
VSX J044754.2-101043.

Congratulations to K. Itagaki on his latest discovery!

Elizabeth O. Waagen, AAVSO



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