Early risers have a good opportunity to catch Mercury in the pre-dawn sky as the planet leaves Virgo behind and enters Libra.
(Click on an image to enlarge.)
Images Courtesy of Mobile Observatory.
09:02 UT – Venus is 1.6° south of Saturn. (Venus: 100% illuminated, magnitude -3.9, apparent diameter 9.8”. Saturn: magnitude 0.5, apparent diameter 15.1”. Libra, not visible.)
13:54 UT – The almost last quarter Moon is south of M44, the Praesepe open star cluster. (Cancer, pre-dawn sky.)
Mercury leaves Virgo and enters Libra. (Mercury: 89% illuminated, magnitude -0.8, apparent diameter 5.3”. Pre-dawn sky.)
Events in bold involve objects and/or events that are easily visible with the naked eye.
All times are in Universal Time (UTC). To convert the time to your timezone, click here.
Learn more about every upcoming astronomical event in 2015 An Astronomical Year (Kindle eBook) and The Astronomical Almanac (2015-2019) (Kindle eBook) and The Astronomical Almanac (2015-2019) (Paperback Edition).
The Amateur Astronomer’s Notebook allows astronomers to log 150 observing sessions and includes an appendix of hundreds of suggested deep sky objects.