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    Articles > September 2023
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Guide to the Night Sky 2023
2023 Guide to the Night Sky

A monthly guide to the night sky in 2023 with star charts, sky calendar, planet data, moon phases, and meteor showers.
More info | Buy now

Customer Reviews


All sky watchers need a planisphere to quickly show the location of stars and constellations for any date and time. Note: Planispheres are designed for specific latitudes so be sure to select one for your latitude.

Guide to the Stars

(5th Edition, Jan. 2013)
A very large 16-inch diameter information-rich planisphere (plastic) for use anywhere between latitude 30° & 60° North. Also available in a Southern Hemisphere edition.
More info | Buy now

200+ Customer Reviews

More Planispheres

The Night Sky Planisphere

A very popular 8-inch diameter, two-sided planisphere (plastic) designed to depict the night sky with less distortion than regular planispheres. Available for several latitudes, and in a smaller 5-inch edition.
More info | Buy now

150+ Customer Reviews

Night Sky Editions
Latitude 20° to 30° North
Latitude 30° to 40° North
Latitude 40° to 50° North
Latitude 50° to 60° North
Southern Hemisphere
(more info)

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  Sky Calendar -- September 2023
4 Moon near Jupiter at 18h UT (morning sky). Mag. −2.6.
Jupiter (Wikipedia)
5 Moon near the Pleiades at 22h UT (morning sky).
The Pleiades (Wikipedia)
6 Mercury at inferior conjunction with the Sun at 11h UT. The innermost planet passes into the morning sky.
6 Last Quarter Moon at 22:21 UT.
8 Moon near M35 star cluster at 10h UT (morning sky).
9 Moon near Castor at 22h UT (morning sky).
10 Moon near Pollux at 4h UT (morning sky).
11 Moon near Beehive cluster M44 at 9h UT (morning sky).
Beehive Cluster (Wikipedia)
M44: The Beehive Cluster (APOD)
12 Moon at apogee (farthest from Earth) at 16h UT (distance 406,291km; angular size 29.4').
13 Moon near Regulus at 7h UT (morning sky).
Regulus (Wikipedia)
14 Moon near Mercury at 0h UT (13° from Sun, morning sky). Mag. 1.9.
15 New Moon at 1:39 UT. Start of lunation 1246.
16 Mercury 8.0° ESE of Regulus at 5h UT (23° from Sun, morning sky). Mags. 1.1 and 1.4.
Mercury (Wikipedia)
16 Moon near Mars at 21h UT (19° from Sun, evening sky). Mag. 1.7.
Mars (Wikipedia)
17 Moon near Spica at 19h UT (evening sky).
Spica (Wikipedia)
18 Venus at its brightest at 12h UT (40° from Sun, morning sky). Mag. −4.5.
Venus (Wikipedia)
21 Moon near Antares at 10h UT (evening sky). Occultation visible from east Asia.
Antares (Wikipedia)
22 Mercury at greatest elongation west at 13h UT (18° from Sun, morning sky). Mag. −0.4.
22 First Quarter Moon at 19:31 UT.
23 September equinox at 6:50 UT. The time when the Sun reaches the point along the ecliptic where it crosses into the southern celestial hemisphere marking the start of autumn in the Northern Hemisphere and spring in the Southern Hemisphere.
Equinox (Wikipedia)
27 Moon near Saturn at 4h UT (evening sky). Mag. 0.5.
Saturn (Wikipedia)
28 Moon at perigee (closest to Earth) at 1:02 UT (distance 359,911km; angular size 33.2').
29 Full Moon at 9:57 UT.
All times Universal Time (UT).
  • US Eastern Daylight Time = UT − 4 hours.
  • US Pacific Daylight Time = UT − 7 hours.
  • Australian Eastern Standard Time = UT + 10 hours
  • Singapore Standard Time = UT + 8 hours.

Clear skies till next month!

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