Skip to main content

Web Publications


AAVSO Special Notice #50: Second update on V5558 Sgr AAVSO HOME > publications > special notice

AAVSO Special Notice #50

Second update on V5558 Sgr
June 28, 2007

V5558 Sgr, a slow nova that has been rising since April
(see Special Notices 44, 45, and 48) exhibited a brief 
brightening over the past few days, and may now be trending 
downwards.  The most recent observations as of this notice 
place the star at V ~ 8.1 at JD 2454280.0 after reaching
m(vis) ~ 7.8.  Both visual and CCD observers are strongly 
encouraged to continue monitoring this peculiar object;
BVRI observations are especially encouraged, as they will 
provide important information on the spectral evolution 
of this nova.  We will add comparison stars to VSP if and 
when it brightens beyond the current bright limit of the 
chart (mag 7.6).  We note that the extremely slow nova 
V723 Cas (Nova Cas 1995) exhibited a short rapid rise 
before finally beginning to decline about 100 days after 
outburst, and a similar event may be happening here.

Coordinates are: RA 18:10:18.26, Dec -18:46:51.9 (J2000)

Please report observations to the AAVSO as 1804-18 V5558 SGR.

Matthew Templeton


---------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/observing/submit/

SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

A Special Notice archive is available at the following URL:
http://www.aavso.org/publications/specialnotice/

Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/publications/email/

Keywords:
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484