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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: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Sagitta » 

13 Sagittae

Altitude: -0.6°   Azimuth: 60.2°   Direction: East-North-East

13 Sagittae is a variable and double giant star in the constellation of Sagitta.

13 Sagittae visual magnitude is 5.37. Because of its reltive faintness, 13 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 13 Sagittae:


13 Sagittae is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -0.6°
Azimuth: 60.2°
Direction: East-North-East

Celestial coordinates and finder chart of 13 Sagittae

13 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 13 Sagittae are provided in the following table:

20h 00m 03s
+17° 31’ 00”

The simplified sky map below shows the position of 13 Sagittae in the sky:

Finder chart 13 Sagittae star
Simplified finder chart for 13 Sagittae.

Visibility of 13 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 13 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: 72.5°
Max altitude: 56.0°
Azimuth: 287.5°

Digitized Sky Survey image of 13 Sagittae

The image below is a photograph of 13 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 13 Sagittae is 0.004 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 13 Sagittae star
DSS2 image of 13 Sagittae. The red arrow shows the motion of 13 Sagittae during the next 10000 years (0.67 arcmin in Right Ascension and -1.83 arcmin in declination);

Distance of 13 Sagittae from the Sun and relative movement

13 Sagittae is distant 746.00 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

228.83 pc
746.00 ly
-17 km/s
0.004 arcsec/year
-0.011 arcsec/year

Spectral properties of 13 Sagittae

13 Sagittae belongs to spectral class M4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 13 Sagittae is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 13 Sagittae. Attribution: Richard Powell / CC BY-SA

13 Sagittae star system properties

13 Sagittae is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 13 Sagittae double sysyem:

28.5 arcsec

Alternative designations of 13 Sagittae

13 Sagittae