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			AAVSO ALERT NOTICE 187 (June 3,1994)

1729-19 NOVA OPHIUCHI 1994

We have been informed by T. Kato and by the Central Bureau for Astronomical Telegrams 
(IAU Circular 6001) that S. Nakano, Sumoto, Japan, reported the photographic discovery 
of an apparent nova in Ophiuchus by Akihiko Tago, Yanahara-cho, Kume-gun, Okayama, 
Japan, on June 1.647 and 2.672 UT, at magnitude 7.0. The discovery was made using T-
Max 400 film and a 50-mm f/2.8 camera lens.

Via S. Nakano, Y. Kushida, Yatsugatake South Base Observatory, Japan, reports the 
following position, precessed to epoch 1950, for N Oph 94 (IAU Circular 6001):

		R.A. = 17h 32m 47.56s	Dec. = -19deg 17' 41.8"

The nova was not visible on Tago's patrol photographs taken through May 20. Additional 
estimates from IAU Circular 6001 include: May 16.63 UT, < 9 photographic (M. Sugano, 
Kakogawa, Hyogo, Tri-X film); Jun 1.73, 7.5-8 photographic (Sugano); 2.621, 6.5 
photovisual (M. Yamamoto, Okazaki, Aichi, independent discovery, T-Max film)); 3.54, 8.5 
visual (Kushida); 3.557, 7.9 photovisual (Kushida, T-Max 400 film); 3.617, 7.8 visual (S. 
Takahashi, Dynic Astronomical Observatory).

D. Overbeek, Edenvale, South Africa, reports this object of reddish-yellow color and at 8.5 
visual magnitude on June 3.81 UT, using comparison stars SAO 160635 (V= 7.755 and B-
V = +0.511 - Hipparcos Input Catalogue) and SAO 160647 (9.1 visual - SAO Catalog).

Please use the accompanying chart from the AAVSO Variable Star Atlas to observe N Oph 
94 and report your observations to AAVSO Headquarters so we may inform the 
astronomical community. Be sure to include which comparison stars you are using to make 
your estimates.

Congratulations to Akihiko Tago and Minoru Yamamoto on their discoveries!


D. York, Abiquiu, NM, and D. Overbeek, Edenvale, South Africa, independently reported 
an outburst of the dwarf nova TV Crv. This outburst is continuing with a slow decline, as 
indicated by the following observations:

May 28.18 UT, 14.0 (D. York, Abiquiu, NM); 28.21, 14.0 (York); 28.24, 14.0 (York); 29.70, 
12.1 (D. Overbeek, Edenvale, South Africa); 30.15, 12.4 (York); 30.17, 12.5 (York); 30.20, 
12.4 (York); 30.22, 12.5 (York); Jun 1.24, < 13.0 (R. Royer, Lakewood, CA); 2.19, 13.5 
(York); 2.20, < 13.0 (Royer); 2.23, 13.6 (York); 2.25, 13.6 (York).

This variable has an interesting history. It was discovered as a "nova" in 1931 by Clyde 
Tombaugh during his photographic trans-Saturnian planet search, which led to his 
discovery of Pluto. D. Levy in the late 1980's examined Harvard photographic plates taken
from 1930 to 1988 for more possible outbursts of this object and discovered 9 more, which 
then confirmed TV Crv to be not a nova but a dwarf nova-type cataclysmic variable.

Please use the accompanying finder chart from the Royal Astronomical Society of New 
Zealand, Variable Star Section, to observe TV Crv and report your observations to 


In AAVSO Alert Notice 186, an observation of UV Per on June 1.48 UT at 10.5 was 
reported by R. Royer, Lakewood, CA. This observation was an error and should be 

UV Per continues to be bright. Recent observations include Jun 1.28 UT, 12.0 (C. Scovil, 
Stamford, CT); 2.23, 12.7 (R. Stewart, Rochelle Park, NJ); 2.29, 12.2 (Scovil); 2.48,12.2 (R. 
Royer, Lakewood, CA); 3.48, 12.4 (Royer); 3.50, 12.4 (Royer).

Please continue to observe UV Per, using the chart distributed with AAVSO Alert Notice 
186, and report your observations to AAVSO Headquarters.

The answering machine at AAVSO Headquarters is on nights and weekends for your 

Thank you very much for all your efforts and your astronomical contributions.

Clear skies and good observing!

Janet A. Mattei 

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484