Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:45  
clear_day Transit: 12:57  
SunsetSet: 21:09 south
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All Constellations » Lacerta » 

13 Lacertae

Altitude: 5.1°   Azimuth: 344.5°   Direction: North-North-West

13 Lacertae is a double hypergiant star in the constellation of Lacerta.

13 Lacertae visual magnitude is 5.08. Because of its reltive faintness, 13 Lacertae 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 Lacertae:


13 Lacertae is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 5.1°
Azimuth: 344.5°
Direction: North-North-West

Celestial coordinates and finder chart of 13 Lacertae

13 Lacertae is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 13 Lacertae are provided in the following table:

22h 44m 05s
+41° 49’ 09”

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

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

Visibility of 13 Lacertae from your location

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

13 Lacertae is circumpolar and transits at 05:46 UTC (altitude: 80.3°)

Digitized Sky Survey image of 13 Lacertae

The image below is a photograph of 13 Lacertae 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 Lacertae is -0.007 arcsec per year in Right Ascension and 0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 13 Lacertae star
DSS2 image of 13 Lacertae. The red arrow shows the motion of 13 Lacertae during the next 100000 years (-11.67 arcmin in Right Ascension and 6.67 arcmin in declination);

Distance of 13 Lacertae from the Sun and relative movement

13 Lacertae is distant 274.18 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

84.10 pc
274.18 ly
13 km/s
-0.007 arcsec/year
0.004 arcsec/year

Spectral properties of 13 Lacertae

13 Lacertae belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


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

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

13 Lacertae star system properties

13 Lacertae is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 13 Lacertae double sysyem:

14.6 arcsec

Alternative designations of 13 Lacertae

13 Lacertae