October 4th, 2015
The Moon reaches last quarter today, in the constellation of Gemini the Twins. Just as the most recent first quarter Moon was the southernmost of the year, this last quarter Moon is actually the northernmost. The first quarter Moon occurred in Sagittarius, the southernmost constellation, and now, half an orbit later, the Moon has moved through half the sky and is now in Gemini, the northernmost constellation.
Since the last quarter Moon is due south at sunrise, you’ll see it at its highest at that time. The Moon takes roughly four weeks to orbit the Earth – a convenient number as it means the Moon will turn new in about a week. In two weeks from now, the first quarter Moon will appear due south in the evening sky – but this time, at sunset.
All Astronomical Events for October 4th, 2015
21:06 UT – Last Quarter Moon. This is the northernmost last quarter moon of the year. (Naked eye, Gemini, pre-dawn sky.)
The dwarf elliptical galaxy M110 culminates at midnight tonight. (Magnitude 8.9. Andromeda, all night.)
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.
Astronomical events taken from 2015: An Astronomical Year, available in Kindle and paperback formats from Amazon in the US, Canada and the United Kingdom. Night sky simulations created using Mobile Observatory for Android devices. Vesta image courtesy NASA/JPL-Caltech/UCLA/MPS/DLR/IDA
2015: An Astronomical Year
|2016: An Astronomical Year||2016: The Night Sky Sights||The Astronomical Almanac (2015-2019)||The Deep Sky Observer’s Guide|
(Kindle & Paperback)
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