Advertisers in This Issue Astronomy equipment manufacturers and dealers are a valuable resource for amateur and professional astronomers alike. Patronize our advertisers in this issue and enjoy all the benefits of their expertise. Product Locator AAVSO »page 83 variable-stars organization with International Database aavso.org Astro-Physics »page 81 mounts / telescopes astro-physics.com Heritage Auctions »page 5 auctions HA.com iOptron »page 3 mounts / telescopes ioptron.com QHYCCD Light Speed Vision »back cover cameras qhyccd.com Sky-Watcher »inside front cover binoculars / mounts / telescopes skywatcherusa.com Stellarvue »inside back cover eyepieces / telescopes stellarvue.com Ad Index AAVSO ..................................................... 83 American Astronomical Society ................ 83 Astro-Physics .......................................... 81 Bob's Knobs ............................................. 80 Casitas de Gila Guesthouses .................... 80 Consumer Cellular ................................... 57 DIRECTV Stream .................................. 3, 81 Gary Blomquist ........................................ 80 Generac ................................................... 13 Heritage Auctions ....................................... 5 Insight Cruises ......................................... 81 iOptron ...................................................... 3 Knightware .............................................. 81 Lunatico Astronomia ................................ 80 NexDome ................................................. 81 New Pond Farm Observatory .................... 80 Nine Planets Ring .................................... 81 Precise Parts ........................................... 80 QHYCCD Light Speed Vision ..................... C4 Revolution Imager .................................... 80 Sky & Telescope ...................1, 5, 13, 57, 73 Sky-Watcher ............................................ C2 Stellarvue ................................................ C3 Technical Innovations ............................... 81 TruGreen .................................................... 5 Willmann-Bell .................................... 73, 80 To advertise in our Product Locator, please email Rod Nenner at: ads@skyandtelescope.org 82 SEPTEMBER 2023 * SKY & TELESCOPEhttp://www.qhyccd.com http://www.aavso.org http://www.astro-physics.com http://www.skywatcherusa.com http://www.HA.com http://www.stellarvue.com http://www.ioptron.com