JAAVSO Volume 49 Number 2, 2021 is published

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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 49, Number 2, 2021

Articles in This Issue

• Editorial

  • The Range of Content in JAAVSO

    Nancy D. Morrison

• Variable Star Research

  • V963 Persei as a Contact Binary

    Joel A. Eaton, Gary W. Steffens, Andrew P. Odell

  • Discovery of Romanov V20, an Algol-Type Eclipsing Binary in the Constellation Centaurus, by Means of Data Mining

    Filipp Dmitrievich Romanov

  • The Long-term Period Changes of the Cepheid Variable SV Monocerotis

    Pradip Karmakar, Gerard Samolyk

  • Binaries with Mass Ratios Near Unity: The First BVRI Observations, Analysis and Period Studies of TX Canis Minoris and DW Canis Minoris

    Ronald G. Samec, Daniel Caton, Jacob Ray, Riley Waddell, Davis Gentry, Danny Faulkner

  • An Analysis of X-Ray Hardness Ratios between Asynchronous and Non-Asynchronous Polars

    Eric Masington, Thomas J. Maccarone, Liliana Rivera Sandoval, Craig Heinke, Arash Bahramian, Aarran W. Shaw

  • High Cadence Millimagnitude Photometric Observation of V1112 Persei (Nova Per 2020)

    Neil Thomas, Kyle Ziegler, Peter Liu

  • Spectroscopic and Photometric Study of the Mira Stars SU Camelopardalis and RY Cephei

    David Boyd

  • CCD Photometry, Light Curve Modeling, and Period Study of V573 Serpentis, a Totally Eclipsing Overcontact Binary System

    Kevin B. Alton, Edward O. Wiley

  • Distances for the RR Lyrae Stars UU Ceti, UW Gruis, and W Tucanae

    Ross Parker, Liam Parker, Hayden Parker, Faraz Uddin, Timothy Banks

  • 25 New Light Curves and Updated Ephemeris through Analysis of Exoplanet WASP-50 b with EXOTIC

    Ramy Mizrachi, Dylan Ly, Leon Bewersdorff, Kalée Tock

  • Characterization of NGC 5272, NGC 1904, NGC 3201, and Terzan 3

    Paul Hamrick, Avni Bansal, Kalée Tock

  • Retraction of and Re-analysis of the Data from “HD 121620: A Previously Unreported Variable Star with Unusual Properties”

    Roy A. Axelsen

  • CCD Photometry, Light Curve Modeling and Period Study of V1073 Herculis, a Totally Eclipsing Overcontact Binary System

    Kevin B. Alton, John C. Downing

  • Pulsating Red Giants in a Globular Cluster: 47 Tucanae

    John R. Percy, Prateek Gupta

  • CCD Photometry, Light Curve Modeling, and Period Study of GSC 2624-0941, a Totally Eclipsing Overcontact Binary System

    Kevin B. Alton, John C. Downing

  • A Photometric Study of the Eclipsing Binary LO Ursae Majoris

    Edward J. Michaels

• Variable Star Data

  • Photometric Observations of the Dwarf Nova AH Herculis

    Corrado Spogli, Gianni Rocchi, Stefano Ciprini, Dario Vergari, Jacopo Rosati

  • Photometric Determination of the Distance to the RR Lyrae Star YZ Capricorni

    Jamie Lester, Rowan Joignant, Mariel Meier

  • Southern Eclipsing Binary Minima and Light Elements in 2020

    Tom Richards, Roy A. Axelsen, Mark Blackford, Robert Jenkins, David J. W. Moriarty

  • The Photometric Period of V1674 Herculis (Nova Her 2021)

    Richard E. Schmidt, Sergei Yu. Shugarov, Marina D. Afonina

  • The Photometric Period of V606 Vulpeculae (Nova Vul 2021)

    Richard E. Schmidt

  • Recent Minima of 218 Eclipsing Binary Stars

    Gerard Samolyk

• Instruments, Methods, and Techniques

  • Daylight Photometry of Bright Stars—Observations of Betelgeuse at Solar Conjunction

    Otmar Nickel, Tom Calderwood

• Errata

  • Erratum: Four New Variable Stars in the Field of KELT-16

    Daniel J. Brossard, Ronald H. Kaitchuck