Mars and Neptune are close together in the evening twilight, with less than half a Moon’s width between them. Depending on your local conditions, the pair should appear within the same field of view through binoculars or a low power eyepiece. Mars will appear as a red “star” fairly low in the south-west after sunset.
(Click on an image to enlarge.)
Images Courtesy of Mobile Observatory.
09:00 UT – Mercury fades to magnitude 0.0 (37% illuminated, diameter 7.8”. Capricornus, evening sky.)
11:00 UT – The almost-new Moon passes Pluto. (Pluto: magnitude 14.2. Sagittarius, not visible.)
21:21 UT – Mars appears 13’ south of Neptune. (Mars: 95% illuminated, magnitude 1.2, diameter 4.6”. Neptune: magnitude 8.0, diameter 2.2”. Aquarius, evening sky. See image above.)
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.