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			AAVSO ALERT NOTICE 153 (January 14, 1992)


The Central Bureau for Astronomical Telegrams has informed us of the photographic discovery 
of a supernova in NGC 1380 by William Liller, Vina del Mar, Chile, on 1992 January 11.16 UT 
at magnitude 12.8.

The supernova was independently discovered visually on January 12.7 by N. Brown, Perth, 
Western Australia, at magnitude 13.0.

The supernova is offset from the galaxy's center 3" west and 62" north. The position of the 
supernova (epoch 1950), measured by R McNaught, Siding Spring, Australia, is:

	RA. 03h 34m 21.52s	Decl. -35deg 07' 22.5"

Astronomers evaluating a spectrogram taken with the Anglo-Australian Telescope indicate 
this supernova to be type Ia, near maximum light.

Observations of the supernova include:

Jan.	7 UT	not visible	photographic, W. Liller, Vina del Mar, Chile
	11.16	12.8		photographic, Liller
	12.45	13.0		R. McNaught, Siding Spring, Australia
	12.7	13.0		N. Brown, Perth, W. Australia

Please use the accompanying "d" scale AAVSO chart and the color-reversed Thompson/Bryan 
chart of NGC 1380 to observe the supernova and report your observations to AAVSO 
Headquarters, so we may inform the astronomical community. The answering machine 
(617-354-0484) is on weekends and nights for your convenience.

Congratulations to Bill and to N. Brown on their discoveries!


This nova continues to be quite bright, as the following observations indicate:

Jan.	5.54	8.2 A Pearce, Scarborough, W. Australia 
	6.55	8.5 Pearce
	7.54	8.7 Pearce
	7.76	9.0 D. Overbeek, Edenvale, South Africa 
	8.1	9.1 Overbeek
	8.27	8.1 C. Scovil, Stamford, CT
	8.62	8.7 Pearce
	9.1	9.0 Overbeek
	9.24	8.3 M. Adams, Melbourne, FL
	10.0	9.0 Overbeek
	10.19	8.5 Adams
	10.642	8.8 S. Sakuma, Kawas~ Japan
	11.1	9.0 J. Smit, Waverly, South Africa
	11.267	8.8 P. Steffey, Daytona Beach, FL
	11.30	8.5 Adams
	12.0	8.7 Overbeek
	12.1	9.0 Smit
	12.36	9.0 K. Larson, Lawndale, CA
	12.8	8.9 Smit
	13.184	8.9 Steffey
	13.19	8.6 Adams
	14.12	8.7 C. Stephan, Sebring, FL
	14.33 .	8.6 R. Royer, Lakewood, CA

Please note that the position of the nova on the chart issued with AA VSO Alert Notice 152 
should be corrected by moving the nova 1/4 of an inch to the right, that is, to the east. 
Please continue to monitor N Pup 91 and call in your observations to AA VSO Headquarters.

Janet Mattei, who is still away from Headquarters, and I thank you for your valuable 
observations and astronomical efforts.

Oear skies and good observing!

Elizabeth O. Waagen 
Senior Technical Assistant

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