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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 6:30 
Transit: 12:56 
Sunset: 19:21
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All Constellations » Lacerta » 

α Lacertae (alpha Lacertae)

Above the horizon.  Circumpolar today
Alt: 40.58°   Az: 56.41°   Direction: East-North-East

α Lacertae is a double main-sequence star of spectral class A1 in the constellation of Lacerta.

α Lacertae visual magnitude is 3.77. Because of its moderate brightness, α Lacertae is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of α Lacertae (alpha Lacertae) star
DSS2 image of α Lacertae. The red arrow shows the motion of α Lacertae during the next 1000 years (2.30 arcmin in Right Ascension and 0.32 arcmin in declination);

Celestial Coordinates

Apparent

22h 32m 18s
+50° 24’ 35”
18h 27m 33s
16h 59m 51s

J2000

22h 31m 17s
+50° 16’ 56”

Galactic Coordinates

101.26°
-6.6°

Finder Chart

Finder chart α Lacertae (alpha Lacertae) star
Simplified finder chart for α Lacertae (alpha Lacertae).

Magnitude, Color, Spectral Class

3.77
Main-sequence

1.29
A1V
10002K

The red dot in the diagram below shows where α Lacertae is situated in the Hertzsprung–Russell diagram.

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

Star System Properties

α Lacertae 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 α Lacertae double sysyem:

3.77
12.07
8.3
36.3 arcsec

Distance, Radial Speed, Proper Motion

α Lacertae is distant 102.32 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

31.39
102.32
-4 km/s
0.138 arcsec/y
0.019"/y

Alternative Designations

α Lacertae
(alpha Lacertae)
SAO34542
SAO34542

Visibility from Your Location

α Lacertae (alpha Lacertae) is circumpolar and transits at 23:06 UTC (altitude: 88.9°)