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V2487 Oph – Recurring nova
Alert Notice 556: Monitoring of V2487 Oph requested (October 2016)
https://www.aavso.org/aavso-alert-notice-556
“Dr. Pagnotta writes: “V2487 Oph is a recurrent nova that was first seen in 1998. During a search of the Harvard College Observatory archives for previous eruptions, we found one that was recorded in 1900. Based on the speed and magnitude of the eruption, and the coverage of archived plates and other detection sources, we calculated how often V2487 Oph should erupt, which is about once every 18–20 years.
For more information, see http://adsabs.harvard.edu/abs/2009AJ....138.1230P). Since 18 years have passed since the previous eruption (1998), we are requesting regular observations from the AAVSO to help us detect the next eruption of V2487 Oph.”
AD (eq. date) : 17h 33m 05.0s
DE (eq. date) : -19° 14' 40.1"
L/T/C (loc) : 20h57m / 01h37m / 06h17m
Constellation : Ophiuchus
Numéro 2487 dans Ophiuchus
Type variabilité : NA
Magnitude maximale : 9.5
Mag. min. (ou amplitude) : 17.7
Syst. phot. pour les mag. : p
Référence étoile : 75189
Référence chart : USNO
Image Aladin
References: http://iopscience.iop.org/article/10.1088/0004-6256/138/5/1230/pdf
*Recurrent novae, which differ from typical novae by the fact that two or more flakes (instead of just one) separated by 10 to 80 years have been observed.
AAVSO Website Curve
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JBD Juin 2018