12 Scorpii

12 Scorpii is a variable and double main-sequence star in the constellation of Scorpius.

12 Scorpii visual magnitude is 5.67. Because of its reltive faintness, 12 Scorpii should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 12 Scorpii:

Color of 12 Scorpii ⬤

Magnitude of 12 Scorpii 5.67

Class Main-sequence

VISIBILITY RIGHT NOW 12 Scorpii is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 10°.

Celestial coordinates and finder chart of 12 Scorpii

12 Scorpii is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 12 Scorpii are provided in the following table:

Right Ascension J2000 16h 12m 15s

Declination J2000 -28° 25’ 03”

Galactic Longitude 347.75°

Galactic Latitude 16.5°

Constellation Scorpius

The simplified sky map below shows the position of 12 Scorpii in the sky:

Simplified finder chart for 12 Scorpii.

Visibility of 12 Scorpii from your location

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

Today's 12 Scorpii rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 118.4° RISE 21:39

Max altitude: 10.1° TRANSIT 0:47

Azimuth: 241.6° SET 3:58

RIGHT NOW 12 Scorpii is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 12 Scorpii

The image below is a photograph of 12 Scorpii from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 12 Scorpii is -0.032 arcsec per year in Right Ascension and -0.043 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 12 Scorpii. The red arrow shows the motion of 12 Scorpii during the next 10000 years (-5.33 arcmin in Right Ascension and -7.17 arcmin in declination);

Distance of 12 Scorpii from the Sun and relative movement

12 Scorpii is distant 297.99 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

Distance (parsec) 91.41 pc

Distance (light year) 297.99 ly

Heliocentric radial velocity -3 km/s

Proper Motion RA -0.032 arcsec/year

Proper Motion Dec -0.043 arcsec/year

Spectral properties of 12 Scorpii

12 Scorpii belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 0.87

Spectral Type B9V

Color Index (B-V) 0.01

Temperature of 12 Scorpii 10002K

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

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

12 Scorpii star system properties

12 Scorpii 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 Scorpii double sysyem:

Main star magnitude 5.67

Secondary star magnitude 7.77

Magnitude difference 2.1

Separation 3.9 arcsec

Alternative designations of 12 Scorpii

Flamsteed designation 12 Scorpii

Henry Draper Catalogue HD145483

SAO Catalogue SAO184217

Hipparcos Catalogue HIP79399

Durchmusterung Catalogue CD-2811962

General Catalogue of Variable Stars 7520

Aitken Double Star Catalogue ADS9953

In Evidence

Other stars in Scorpius