[vsnet-alert 3265] Re: Nova Oph 1998 (Goranskij)

[Patrick Schmeer <extpasc@rz.uni-sb.de>]

Nova Oph 1998 was discovered by Kesao Takamizawa on two photos taken
on 1998 June 15.561 UT at mpg= 9.5. On May 31.622 UT it was fainter
than V= 11.8. Hanzl observed it at V= 10.32 on June 17.971 UT, V=
12.22 on June 22.878, V= 12.92 on June 25.942, and V= 14.76 on July 
20.886 UT. 
So the maximum of Nova Oph 1998 occurred in the first half of June,
and the observed value for t3 is about 9 days (the visual magnitude
for June 15 is unfortunately not known). 
If Nova Oph 1998 was back at minimum by 1999 April, then the
extremely short time for its return to quiescence, and the value
for t3 in combination with the low amplitude would by atypical for
a classical nova, but very typical for a recurrent nova. 
Alternatively the prenova may have been misidentified and is
actually a (faint) close companion to the suggested USNO star. In 
this case the amplitude of the eruption would be higher, and the 
duration for the complete fading would be (much) longer. 
 
Regards,
Patrick

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