β2 Scorpii (beta2 Scorpii)

Below the horizon. Rise: 20:56 | Tran: 1:11 | Set: 5:21

Alt: -10.62° Az: 251.35° Direction: West-South-West

β2 Scorpii is a variable and multiple main-sequence star of spectral class B2 in the constellation of Scorpius.

β2 Scorpii visual magnitude is 4.92. Because of its moderate brightness, β2 Scorpii 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 β2 Scorpii (beta2 Scorpii) star

DSS2 image of β2 Scorpii. The red arrow shows the motion of β2 Scorpii during the next 10000 years (-3.17 arcmin in Right Ascension and -3.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 16h 06m 55s

Declination -19° 52’ 09”

Hour Angle 05h 27m 55s

Sidereal Time 21h 34m 51s

J2000

Right Ascension 16h 05m 26s

Declination -19° 48’ 06”

Galactic Coordinates

Galactic Longitude 353.2°

Galactic Latitude 23.6°

Finder Chart

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Finder chart for β2 Scorpii (beta2 Scorpii).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.92

Class Main-sequence

Absolute magnitude -2.78

Spectral Type B2V

Color Index (B-V) -0.02

Temperature 10382K

The red dot in the diagram below shows where β2 Scorpii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of β2 Scorpii. Attribution: Richard Powell / CC BY-SA

Star System Properties

β2 Scorpii 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 β2 Scorpii double sysyem:

Main star magnitude 4.92

Secondary star magnitude 6.22

Magnitude difference 1.3

Separation 0 arcsec

Distance, Radial Speed, Proper Motion

β2 Scorpii is distant 1,131.94 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

Distance (parsec) 347.22

Distance (light year) 1,131.94

Radial Speed -4 km/s

Proper Motion RA -0.019 arcsec/y

Proper Motion Dec -0.02"/y

Alternative Designations

Bayer designation β2 Scorpii
(beta2 Scorpii)

Flamsteed designation 8 Scorpii

Henry Draper Catalogue HD144218

SAO Catalogue SAO159683

Hipparcos Catalogue HIP78821

Durchmusterung Catalogue BD-19 4308

General Catalogue of Variable Stars 7424

Aitken Double Star Catalogue ADS9913

Visibility from Your Location

Today's β2 Scorpii (beta2 Scorpii) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 109.9° RISE 20:56

Max altitude: 18.7° TRANSIT 1:11

Azimuth: 250.1° SET 5:21

Set Location

Other stars in Scorpius