12 Lacertae

Below the horizon. Rise: 0:18 | Tran: 3:52 | Set: 7:25

Alt: -79.73° Az: 305.45° Direction: North-West

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 11h 16m 03s

Sidereal Time 09h 58m 40s

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

Today's 12 Lacertae rise, transit and set times from Nowra (AU) are the following (all times relative to the local timezone Australia/Sydney):

Azimuth: 49.6° RISE 0:18

Max altitude: 14.8° TRANSIT 3:52

Azimuth: 310.4° SET 7:25

Name:	Nowra (AU)
Latitude:	34° 53' 3.2" S
Longitude:	150° 36' 1.3" E
Timezone:	Australia/Sydney

Set Location

Other stars in Lacerta