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AAVSO Special Notice #166: Possible Nova in Ophiuchus AAVSO HOME > publications > special notice

AAVSO Special Notice #166

Possible Nova in Ophiuchus
August 17, 2009

Observers S. Kiyota (Tsukuba, Japan) and L. Elenin (Moscow, Russia) have
independently confirmed the presence of a new object in Ophiuchus previously
reported on the CBAT Unconfirmed Observations Page (D.W.E. Green, editor;
see http://www.cfa.harvard.edu/iau/unconf/cbat_unconf.html for details).
Kiyota remotely used the GRAS-G1 (0.3-m) in Mayhill, New Mexico and
reports the following magnitudes: B=13.54, JD 2455060.6329; V=11.90, JD
2455060.6341; Rc=10.42, JD 2455060.6353; Ic=9.36, JD 2455060.6365 (via
T. Kato, vsnet-alert 11399).  Kiyota derives the following coordinates:
RA: 17 38 19.70 , Dec: -26 44 13.8.  Elenin remotely used the Tzec Maun
0.35-m, also in Mayhill, New Mexico and reports the following magnitudes:
B=13.67, JD 2455060.7247; V=12.43, JD 2455060.7230; Rc=10.78, 
JD 2455060.7184 (private communication).  Elenin also derived coordinates
with the following position end figures: RA: 19.72s , Dec: 13.7" (+/- 0.6
arcseconds RMS).

This object has no counterpart in either the USNO-B1.0 or 2MASS catalogs;
however, a faint source is visible at these coordinates in both the DSS-II
and 2MASS J images.  The object is within the plane of the Milky Way and
is in a very dense star field; as T. Kato points out in vsnet-alert 11399,
this object is highly reddened, with (B-V) = +1.6.  It has not yet been
spectroscopically confirmed as a nova; the AAVSO will issue an Alert Notice
if and when confirmation arrives and the object is formally designated as
a nova.  Observations of this possible nova are encouraged.


The J2000 coordinates of this source (from L. Elenin) are as follows:

RA: 17 38 19.72 , Dec: -26 44 13.7 (+/- 0.6 arcsec)


Finder charts for this object may be plotted by entering the coordinates
above into AAVSO VSP:  http://www.aavso.org/observing/charts/vsp/


Please submit all observations of this object as "VSX J173819.7-264413"
The object has been assigned the AUID of 000-BJP-605.


This AAVSO Special Notice was prepared by M. Templeton.

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