Volume 49 number 2 — 2021

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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