When Is M21 Visible During the Year?

See how M21 visibility changes through the year from your location. The graph shows its seasonal observing windows, while the table gives rise, transit and set times for selected dates.

M21 will become visible again around April 8 after moving far enough from the Sun.

Best Months to See M21

Based on the amount of time M21 is above the horizon during dark or twilight hours, the strongest observing months in the next year are June 2027, July 2027, May 2027.

M21 Visibility Throughout the Year

M21 visibility on 2026-10-23

M21 Visible from sunset until before midnight

M21 rise and set timetable

	Time	Elevation
Moonrise, 80.5% illuminated	14:26	29°
M21 transit	15:06	30°
Sunset	16:20	28°
Civil sunset	16:47	26°
Twilight start (−12°)	17:18	23°
Astronomical observing session begins	17:48	19°
M21 set	19:51
Moonset	02:40	-74°
Astronomical observing session ends	03:56	-71°
M21 rise	10:16

Track M21 position throughout the night

← 23 October 2026 →

Time
Altitude
Azimuth

Shift the map to change the time and observe M21 changing position in the night sky.

M21 Rise, Transit and Set Times by Date