We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Content Menu
Major Objects Bright Comets Asteroids Near Earth Objects Space Probes Constellations & Deep Sky Objects Supernovae
3D Solar System Viewer Online Planetarium Jupiter's Galilean Moons Saturn's Rings and Moons Solar Eclipses
Set Observing Location What is Visible Now? The Sky Tonight Moon Calendar Create Quick Access Page
Articles Donate
About
FAQ
Feedback
Objects
Major Objects Bright Comets Asteroids Near Earth Objects Space Probes Constellations & Deep Sky Objects Supernovae
Charts
3D Solar System Viewer Online Planetarium Jupiter's Galilean Moons Saturn's Rings and Moons
Plan Observations
Set Observing Location What is Visible Now? The Sky Tonight Jupiter's Galilean Moons Moon Calendar Create Quick Access Page
Solar Eclipses
More
Articles Donate
About
FAQ
Feedback
✖ Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
sunny  • Daytime • What's Visible Now?

Support us

If you like TheSkyLive.com please consider a donation to support this project. Thank you!

In Evidence

Best Places to See the 2024 American Eclipse Based on Historical Weather Data
Using historical cloud coverage data we suggest the locations that could provide the better chances to have clear skies on April 8, 2024 to observe the eclipse. Read more...

Other deep sky objects in Sagittarius
All Constellations »  Sagittarius »  Deep Sky Objects » 

Messier 23 - Open Cluster in Sagittarius

Altitude: 15.9°   Azimuth: 154.1°   Direction: South-South-East

Messier 23 is a Open Cluster in the Sagittarius constellation. Messier 23 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year.

Messier 23
Open Cluster
Sagittarius

Messier 23 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 15.9°
Azimuth: 154.1°
Direction: South-South-East

See also Messier 23 rise and set times.

Given its visual magnitude of 5.5, Messier 23 is easily visible with the help of a small binocular.

Available Resources for Messier 23 - Open Cluster in Sagittarius

Photometric information of Messier 23

The following table lists the magnitude of Messier 23 in different bands of the electomagnetic spectrum (when available), from the B band (445nm wavelength, corresponding to the Blue color), to the V band ( 551nm wavelength, corresponding to Green/Yellow color), to the J, H, K bands (corresponding to 1220nm, 1630nm, 2190nm wavelengths respectively, which are colors not visible to the human eye).

6.03
5.5

For more information about photometry in astronomy, check the photometric system article on Wikipedia.

Apparent size of Messier 23

The following table reports Messier 23 apparent angular size. The green area displayed on top of the DSS2 image of Messier 23 is a visual representation of it.
16.8 arcmin
16.8 arcmin

Digitized Sky Survey image of Messier 23

The image below is a photograph of Messier 23 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.56x0.56 degrees (33.6x33.6 arcmins).

Image of Messier 23 - Open Cluster in Sagittarius star
/>
DSS2 image of Messier 23 in the Red band. The green region on the image is a representation of the major (16.8 arcmin) and minor (16.8 arcmin) axes of the object's apparent size.

Celestial coordinates and finder chart of Messier 23

Celestial coordinates for the J2000 equinox of Messier 23 are provided in the following table:

17h 57m 05s
-18° 59’ 07”

The simplified sky charts below show the position of Messier 23 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

Finder chart Messier 23 - Open Cluster in Sagittarius star
Simplified finder chart for Messier 23 - Open Cluster in Sagittarius.

Finder chart Messier 23 - Open Cluster in Sagittarius star
Simplified finder chart for Messier 23 - Open Cluster in Sagittarius.

Rise ans set times of Messier 23 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Messier 23 - Open Cluster in Sagittarius rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 109.0°
Max altitude: 19.5°
Azimuth: 251.0°