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AAVSO Special Notice #27

Possible New Object in Sco/Oph Needs Confirmation
(January 10, 2007)

Daniel Green, Central Bureau for Astronomical Telegrams, has informed us that
Suichi Nakano reports the discovery by Yukio Sakurai of a possible nova or
other variable star on the Scorpius/Ophiuchus border. The object needs to be
confirmed, and an extremely precise position will likely be needed to determine
in which constellation the object is located. It should be noted that the
images were obtained using a digital camera without filter, so they are
essentially unfiltered CCD. Thus, the object might not be a new object, but
instead a reddish star. Sakurai is an extremely experienced observer.

Coordinates: R.A. = 17:41:17  Dec. = -24:45:33  (2000.0)

Discovery details:
2 images obtained January 9.858 UT in bright twilight using a digital camera.
Magnitude 7.5 CCD (limiting magnitude on frames approximately 8-9).
Not visible on frame(s) taken January 8.85 UT.

Nothing near coordinates reported in International Variable Star Index (VSX).
No known or suspected variable located at the coordinates.
No minor planets were in the field at the times in question.

We have assigned this object the designation 1735-24 and the name SAKURAI 07.
Please refer to the object and report observations as 1735-24 SAKURAI 07.
Also, be sure to indicate what chart/comparison star(s) you used.

Confirmation of this object and a precise position are urgently needed. Please
communicate your findings to the AAVSO and cc them to Dan Green at

This special notice was compiled by: Elizabeth O. Waagen

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