Three volumes of Burnham’s Celestial Handbook list hundreds of double stars for all the constellations, from Andromeda to Vulpecula. Data in his tables include the separation of the two stars in seconds of arc (his column is headed DIST). It is quite rewarding to try and see both stars with a telescope or binoculars. This topic is all about the challenge of resolving double star components.
Here is an example from my 6" f/2.2 Celestron Origin taken on October 26, 2024 with 10-second exposures and 10 minute total integration time. This is the double HD 35148 and HD 35149 (23 Orionis) in Orion. Burnham lists the separation as 32", and SIMBAD gives the visual magnitudes and spectral types as 7.2 & B8/9, and 5.0 & B2IV/V, respectively. Both components can be seen in the image.
Logbook Entries
Date: October 26, 2024
Time: 2:09 am
Location: Kempt Shore, Nova Scotia, Canada
Latitude: 45°N
Sky: Clear
Temperature: 6°C
Moon Phase: Waning crescent (28%)
Dennis
Website: https://celestronorigin.space
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