12 Lacertae

Above the horizon. Circumpolar today

Alt: 3.25° Az: 14.05° Direction: South

12 Lacertae is a variable and double giant star of spectral class B2 in the constellation of Lacerta.

12 Lacertae visual magnitude is 5.25. Because of its faintness, 12 Lacertae is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 12 Lacertae. The red arrow shows the motion of 12 Lacertae during the next 100000 years (-8.33 arcmin in Right Ascension and -1.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 22h 42m 37s

Declination +40° 21’ 33”

Hour Angle 13h 14m 11s

Sidereal Time 11h 56m 48s

J2000

Right Ascension 22h 41m 28s

Declination +40° 13’ 32”

Galactic Coordinates

Galactic Longitude 97.65°

Galactic Latitude -16.18°

Finder Chart

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Finder chart for 12 Lacertae.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.25

Class Giant

Absolute magnitude -2.90

Spectral Type B2III

Color Index (B-V) -0.14

Temperature 12293K

The red dot in the diagram below shows where 12 Lacertae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 12 Lacertae. Attribution: Richard Powell / CC BY-SA

Star System Properties

12 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 12 Lacertae double sysyem:

Main star magnitude 5.25

Secondary star magnitude 9.25

Magnitude difference 4

Separation 69 arcsec

Distance, Radial Speed, Proper Motion

12 Lacertae is distant 1,393.16 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 427.35

Distance (light year) 1,393.16

Radial Speed -15 km/s

Proper Motion RA -0.005 arcsec/y

Proper Motion Dec -0.001"/y

Alternative Designations

Flamsteed designation 12 Lacertae

Henry Draper Catalogue HD214993

SAO Catalogue SAO72627

Hipparcos Catalogue HIP112031

Durchmusterung Catalogue BD+39 4912

General Catalogue of Variable Stars DD Lac

Visibility from Your Location

12 Lacertae is circumpolar and transits at 04:40 UTC (altitude: 78.9°)

Set Location

Other stars in Lacerta