June 8, 2007
V5558 Sgr, a nova that went into outburst in April (see Special Notices 44 and 45), continues to increase in brightness. The last reports indicate that this nova has reached V=8.6, brightening by about 0.02mag per day. We have produced a new sequence, based on recent calibration from Sonoita Research Observatory along with nearby Tycho2 and GCPD stars. You can download this sequence as part of the VSP chart:
obsolete link: [http://www.aavso.org/observing/charts/vsp]
2016 link: https://www.aavso.org/vsp
(and select V5558 Sgr as the target). This is highly unusual behavior for a nova, and you should make this object part of your observing routine until further notice.
Coordinates (from SRO, using UCAC2):
18:10:18.26 -18:46:51.9 (J2000)
Since there is a 12th magnitude companion just to the northwest of the variable, use a large enough aperture to include both stars and place a comment to this effect in the comments field.
Report observations to the AAVSO as 1804-18 V5558 SGR.
Arne Henden
---------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
https://www.aavso.org/webobs
SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
A Special Notice archive is available at the following URL:
https://www.aavso.org/special-notice-archive
Subscribing and Unsubscribing may be done at the following URL:
https://www.aavso.org/observation-notification#specialnotices
-------------------------------------------------
Please support the AAVSO and its mission -- Join or donate today:
https://www.aavso.org/apps/donate/