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Alert Notice 670: KIC 2856960 time series coverage needed now

July 9, 2019

AAVSO Forums: This campaign is the topic of the AAVSO Campaigns and Observation Reports forum thread

Dr. Thomas Marsh (University of Warwick) is requesting times series observations of KIC 2856960 beginning immediately.

JAAVSO volume 47, number 1, June 2019, print version now available

The Journal of the American Association of Variable Star Observers
Volume 47, Number 1, 2019

The printed version of this issue is now available from Amazon via the link below.

Volume 47, Number 1; 2019

Alert Notice 669: V386 Ser HST observations rescheduled

August 2, 2019: These HST observations of V386 Ser have been rescheduled to August 15-16. Please see AAVSO Alert Notice 675 for further information and updates.  - E. O. Waagen, AAVSO

Alert Notice 668: V1047 Cen (Nova Cen 2005) rebrightening

Note: Please continue coverage of this nova until further notice.  -  Elizabeth O. Waagen, 13 April 2020

Note: In the original version of this Alert Notice, it was omitted that the rebrightening of V1047 Cen (Nova Cen 2005) was discovered and reported by the Gaia team as Gaia19cfn on June 10, 2019. The target was subsequently observed by OGLE. We apologize sincerely for the omission of this discovery information.  -  Elizabeth O. Waagen

Solar Bulletin - Volume 75, Number 5

The May Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:


The May SID Data Report is available here:

JAAVSO Volume 47 Number 1, 2019 is published


The printed version of this issue will be available soon. Please watch for the announcement on our main web page.

Charts and Sequences Update - June 2019

As usual, the AAVSO Sequence Team has been working hard updating and improving charts and comparison star sequences. The following is a list of updates made during the first six months of 2019. If you observe any of these objects please update your charts and photometry tables with the most recent version as soon as possible. This list is also available for download in XLSX and PDF format (see the links at the bottom of this page.)

Alert Notice 667: V386 Ser to be observed with HST

Updated May 24, 2019: Dr. Paula Szkody informs us that the exact time for the HST observation of V386 Ser has been scheduled for 2019 May 30 04:36-10:15 UT. This is the night of May 29/30 for US observers. Thus, the critical night will be May 28/29 (Wednesday night)  to get a measurement to HST so they can proceed to the observation. It will be essential to have positive observations from this night to satisfy the HST planners, so observers with suitable equipment are urged to obtain positive measurements of this faint star.

Alert Notice 666: CRTS J105122.8+672528 observations needed urgently

May 14, 2019: Dr. Mark Kennedy (Jodrell Bank Centre for Astrophysics, University of Manchester) is urgently requesting observations of the potential cataclysmic variable CRTS J105122.8+672528 beginning immediately. This object appears to be in outburst, having brightened to V~16.2 from its minimum magnitude of V~18.5-CV~19.

Solar Bulletin - Volume 75, Number 4

The April Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:

The April SID Data report is available here:


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