John C. Barentine's Personal Website
  • Home
  • Bio
  • CV
  • Media
  • Photos
    • Germany 2019
    • Hungary 2019
    • Taiwan 2018
    • New Zealand 2018
    • UK 2017
    • Wyoming Eclipse 2017
    • Catalonia 2017
    • Romania 2016
    • Japan 2016
    • Korea 2014
  • Astronomy
    • Carbon Star List
    • The Bluest Hipparchos Stars
    • Astrophotography
  • Research
    • Earthshine
    • Skyglow
    • stars19
  • Papers
  • Books
    • Ashen Light of Venus
    • The Lost Constellations
    • Uncharted Constellations
  • Contact

Astronomy

These pages highlight some of my amateur astronomy work in recent years. I am a primarily visual observer. My main instrument is a 20 cm f/3.8 Newtonian telescope. I have also done some astrophotography but don't consider myself an astrophotographer.
Picture

Carbon Star List

A list of 164 carbon stars ranging in brightness from +4.5 (U Hydrae, at maximum light) to +18.0 (SU Tauri, at minimum light) that make for good targets with small telescopes. These stars often show intense colors through the eyepiece, ranging from pale pink to bright orange to deep, saturated red.
Picture

The Bluest Hipparchos Stars

This list of 11 stars is the result of an experiment to try to visually detect the colors of the brightest, bluest stars I could find. After observing a number of carbon stars, which are among the visually reddest objects in the night sky, I started to wonder about the opposite end of the spectrum. But it turns out that there are very few stars that are blue enough, and bright enough, to convey a sense of intense, saturated color to the eye. 
Picture

Astrophotography

Some astronomical images I have captured over 30+ years using equipment from film cameras to 4-meter-class telescopes.
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  • Home
  • Bio
  • CV
  • Media
  • Photos
    • Germany 2019
    • Hungary 2019
    • Taiwan 2018
    • New Zealand 2018
    • UK 2017
    • Wyoming Eclipse 2017
    • Catalonia 2017
    • Romania 2016
    • Japan 2016
    • Korea 2014
  • Astronomy
    • Carbon Star List
    • The Bluest Hipparchos Stars
    • Astrophotography
  • Research
    • Earthshine
    • Skyglow
    • stars19
  • Papers
  • Books
    • Ashen Light of Venus
    • The Lost Constellations
    • Uncharted Constellations
  • Contact