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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:50  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Sagitta » 

18 Sagittae

Altitude: 21.1°   Azimuth: 81.5°   Direction: East

18 Sagittae is a giant star in the constellation of Sagitta.

18 Sagittae visual magnitude is 6.13. Because of its reltive faintness, 18 Sagittae should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 18 Sagittae:


18 Sagittae is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 21.1°
Azimuth: 81.5°
Direction: East

Celestial coordinates and finder chart of 18 Sagittae

18 Sagittae is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 18 Sagittae are provided in the following table:

20h 16m 19s
+21° 35’ 54”

The simplified sky map below shows the position of 18 Sagittae in the sky:

Finder chart 18 Sagittae star
Simplified finder chart for 18 Sagittae.

Visibility of 18 Sagittae 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 18 Sagittae 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: 68.4°
Max altitude: 60.1°
Azimuth: 291.6°

Digitized Sky Survey image of 18 Sagittae

The image below is a photograph of 18 Sagittae 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 0.5x0.5 degrees (30x30 arcmins). The proper motion of 18 Sagittae is 0.001 arcsec per year in Right Ascension and -0.024 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 18 Sagittae star
DSS2 image of 18 Sagittae. The red arrow shows the motion of 18 Sagittae during the next 10000 years (0.17 arcmin in Right Ascension and -4.00 arcmin in declination);

Distance of 18 Sagittae from the Sun and relative movement

18 Sagittae is distant 297.72 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

91.32 pc
297.72 ly
-4 km/s
0.001 arcsec/year
-0.024 arcsec/year

Spectral properties of 18 Sagittae

18 Sagittae belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 18 Sagittae is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 18 Sagittae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 18 Sagittae

18 Sagittae