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Solar Bulletin - Volume 74, Number 05

The May Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: https://www.aavso.org/solar-bulletin

The May SID Data report is available here: https://www.aavso.org/sid-database

JAAVSO Volume 46 Number 2, 2018 is published

eJAAVSO

http://www.aavso.org/apps/jaavso/volumes/

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

The Journal of the American Association of Variable Star Observers
Volume 46, Number 1, 2018

Articles in This Issue

Alert Notice 637: Nova in Lupus - N Lup 2018 = PNV J15384000-4744500

June 5, 2018

Event: Nova in Lupus - N Lup 2018 = PNV J15384000-4744500

Discovered by: Rob Kaufman (Bright, Victoria, Australia) at White Cliffs, NSW, Australia (via CBET 4520)

Discovery magnitude: 9.1 unfiltered CCD magnitude, object visible in 5 DSLR frames taken with 55mm lens (via CBET 4520)

Discovery date: 2018 June 03.4306 UT (via CBET 4520)

LPV of the Month June, 2018

Alert Notice 635: Monitoring of SDSS J141118.31+481257.6 requested

May 25, 2018: Dr. Thomas Kupfer (University of California, Santa Barbara) has requested AAVSO assistance in monitoring the rare AMCVn binary SDSS J141118.31+481257.6 during its current WZ Sge-like outburst, the first outburst detected for this system.

The outburst was detected by Tadashi Kojima (Gunma-ken, Japan) on 2018 May 19.514 UT with a magnitude 12.6 V  +/- 0.2. At minimum brightness 19.7 CV, SDSS J141118.31+481257.6 brightened by over 6 magnitudes, reaching a peak brightness of 12.5-12.6 V.

Solar Bulletin - Volume 74, Number 04

The April Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: https://www.aavso.org/solar-bulletin

The April SID Data report is available here: https://www.aavso.org/sid-database

Alert Notice 634: Nightly monitoring requested for V1280 Sco = N Sco 2007

May 11, 2018 : Dr. Frederick Walter (Stony Brook University) has requested AAVSO assistance in monitoring V1280 Sco (Nova Sco 2007).

After it appeared as a nova in February 2007 (AAVSO Alert Notice 346), V1280 Sco reached visual magnitude ~3.8 (several observers), then faded to about 13.2, brightened to about 12.7, and underwent a dust dip in June 2007 to <15.6 V (P. Nelson). It recovered to about 10.3 by about a year later.

AAVSO Annual Campaign 2018 -- fill our sky with stars

You and the AAVSO: Together We Explore the Variable Sky

The AAVSO CAP Program is back this year! Click here for the details and become a Citizen Astronomer Promoter

LPV of the Month May, 2018

T Ursae Minoris (T UMi)

Revisited

Summary

T Ursae Minoris (T UMi) is an LPV that has shown a dramatic increase in its period and decrease in its brightness over the last 39 years, so much so that it is no longer considered a Mira type of LPV but is now classified as a Semi-regular (SR) LPV.    

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