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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
SunriseRise: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
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All Constellations » Lacerta » 

2 Lacertae

Altitude: 41.5°   Azimuth: 63.6°   Direction: East-North-East

2 Lacertae is a variable and double main-sequence star in the constellation of Lacerta.

2 Lacertae visual magnitude is 4.57. Because of its moderate brightness, 2 Lacertae should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of 2 Lacertae is 0.023 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 2 Lacertae star
DSS2 image of 2 Lacertae. The red arrow shows the motion of 2 Lacertae during the next 10000 years (3.83 arcmin in Right Ascension and 0.83 arcmin in declination);

Key facts about 2 Lacertae

4.57
Main-sequence

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

Altitude: 41.5°
Azimuth: 63.6°
Direction: East-North-East

Celestial coordinates and finder chart of 2 Lacertae

2 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 2 Lacertae are provided in the following table:

22h 21m 01s
+46° 32’ 12”
97.79°
-8.86°
Lacerta

The simplified sky map below shows the position of 2 Lacertae in the sky:

Finder chart 2 Lacertae star
Simplified finder chart for 2 Lacertae.

Visibility of 2 Lacertae from your location

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

2 Lacertae is circumpolar and transits at 11:49 UTC (altitude: 85.1°)

Distance of 2 Lacertae from the Sun and relative movement

2 Lacertae is distant 509.38 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

156.25 pc
509.38 ly
-10 km/s
0.023 arcsec/year
0.005 arcsec/year

Spectral properties of 2 Lacertae

2 Lacertae belongs to spectral class B6 and has a luminosity class of V corresponding to a main-sequence star.

-1.40
B6V
11573K

The red dot in the diagram below shows where 2 Lacertae is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 2 Lacertae. Attribution: Richard Powell / CC BY-SA

2 Lacertae star system properties

2 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 2 Lacertae double sysyem:

4.57
10.97
6.4
48.2 arcsec

Alternative designations of 2 Lacertae

SAO51904
SAO51904