Phil Harrington binocular universe (April 2007 online extra)
Take a binocular tour of R Leonis' neighborhood.
February 19, 2007
|In the April column, I mentioned that the variable star R Leonis is an excellent spring target for binoculars. It's fun to track the star's brightness as it cycles from maximum brightness to minimum, and back again. Visually estimating the magnitude of a variable star is not as difficult as it may sound. In fact, amateurs can successfully estimate the fluctuating intensity of a variable to an accuracy of one-tenth of a magnitude by comparing it to neighboring stars of known brightness.|
You are currently not logged in. This article is only available to Astronomy magazine subscribers.
Already a subscriber to Astronomy magazine?
If you are already a subscriber to Astronomy magazine you must log into your account to view this article. If you do not have an account you will
need to regsiter for one. Registration is FREE and only takes a couple minutes.
Non-subscribers, Subscribe TODAY and save!
Get instant access to subscriber content on Astronomy.com!
- Access our interactive Atlas of the Stars
- Get full access to StarDome PLUS
- Columnist articles
- Search and view our equipment review archive
- Receive full access to our Ask Astro answers
- BONUS web extras not included in the magazine
- Much more!