Today’s Astronomical Events – May 11th, 2015

The Moon reaches last quarter in Capricornus and is visible in the pre-dawn sky. Observers in Australia will see our satellite riding high near Sagittarius from about 1:00am onwards.

(Click on an image to enlarge.)

Images courtesy of Mobile Observatory. 



10:36 UT – Last Quarter Moon. (Capricornus, pre-dawn sky. See images above.)

17:47 UT – Mercury passes 7.9° north of Aldebaran. (Mercury: 26% illuminated, magnitude 1.0, diameter 8.9”. Taurus, not visible.)

Mercury fades to magnitude 1.0 (26% illuminated, diameter 8.9”. Taurus, evening sky.)



Events in bold involve objects and/or events that are visible with the naked eye.

All times are in Universal Time (UTC). To convert the time to your timezone, click here.

Learn more about upcoming astronomical events in 2015 An Astronomical Year (Kindle Edition) and The Astronomical Almanac (2015-2019) (Kindle Edition and Paperback Edition) and 2016 An Astronomical Year (North American Kindle Edition.)

The Amateur Astronomer’s Notebook allows astronomers to log 150 observing sessions and includes an appendix of hundreds of suggested deep sky objects.

Details of all available books across the world can be found here or by visiting the author’s page on Amazon.

If you have any comments or questions, please feel free to contact me at astronomywriter “at”


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