Otto Struve 525 (aka STT 525) is a triple-star system that features a golden primary (Star A) with two companions (stars B & C) in the constellation Lyra. The Star C is a pretty blue color. Also known as SAO 67566.
Author Archives: Wayne McGraw
Viewing Comet C/2025 R2 SWAN in October Skies
Discover Comet SWAN (C/2025 R2), its rare discovery by SOHO’s SWAN instrument, and its close approach to Earth in October 2025.
Chi Cygni: The Pulsating Beauty of Cygnus
Explore Chi Cygni, a variable red giant in Cygnus whose rhythmic brightening and fading reveal the life cycles of stars. Includes new astrophotography.
About
The Garden Astronomer website is an online diary of personal astronomical observations from suburban light polluted skies. It contains popular objects viewable without a large investment in equipments as most the targets can be seen using small to moderate-sized telescopes. This page also includes reflections from Wayne McGraw on his return to observing during the COVID-19 pandemic.
Exploring Black Hole Cygnus X-1 and Its Companion Star
In my article on Cygnus X-1, I cover the black hole and its massive companion star, HDE 226868, along with how they interact through stellar winds. I’ve also included my own photos and clear illustrations to show exactly where the system is located in Cygnus. It’s a mix of science, observation, and practical stargazing guidance.
NGC 6871: A Simple Sparkling Cluster in Cygnus
Explore the open cluster NGC 6871 in Cygnus with my observing notes, sketch, and Seestar photo. I also highlight the fascinating Wolf–Rayet star WR 133.
Marsic (Kappa Herculis): A Garnet and Topaz Double Star
Learn about Marsic (Kappa Herculis) and see how it looks through an 8-inch SCT scope when viewed from a suburban location. Marsic is an optical double star in the constellation Hercules and best viewed in summer.
T Coronae Borealis (The Blaze Star): Observing Before Explosion in 2024
The binary star T Coronae Borealis is expected to go nova in 2024. To prepare for this stellar event, I share why it’s special and share how the star appears before it explodes using an astrophoto and a sketch taken from my backyard in Seattle in June 2024. The binary is also registered as T CrB, SAO 84129, HR 5958, HD 143454, HIP 78322.
The Garden Astronomer 