Cylindrical Sky Chart

Author: Mathew Madhavacheril

Az/Alt grid is for the chosen location and time. Rising azimuths in dashed.
Shortcut keys
Time ⬅️ -1 hr, ➡️ +1 hr
Day [Shift] + ⬅️ -24 hr, [Shift] + ➡️ +24 hr
Latitude [Ctrl] + ⬆️ : +1° , [Ctrl] + ⬇️ : −1°
Longitude [Ctrl] + ⬅️ : −15°, [Ctrl] + ➡️ : +15°
Automatically update to the
current time every 5 seconds.
|
Whether all times shown are
in UTC or based on the time
zone local to the latitude
and longitude you selected.
Show
Show the ecliptic plane.
Show the Galactic plane.
Show an azimuth / altitude grid
for the selected latitude and
longitude, with rising azimuths
shown in dashed lines.
Show RA, Dec, Alt, Az and which
IAU constellation your mouse
is over when on the grid. Click and
hold or tap and hold to copy to
clipboard.
This shows the tropical zodiac
divisions. It will differ from
the IAU constellations due
to precession of the equinoxes.
Solar System objects
Place object ⭐
Mark a location specified by
RA and Dec with a star emoji.
[Pisces]
The IAU constellation your
object is in.
Ephemeris from mivion/ephemeris
Time zone lookup from photostructure/tz-lookup
IAU constellation zones from Astronomy Engine
Date/time utilites from luxon