22 Scorpii

Altitude: -16.4° Azimuth: 250.1° Direction: West-South-West

22 Scorpii is a main-sequence star in the constellation of Scorpius.

22 Scorpii visual magnitude is 4.79. Because of its moderate brightness, 22 Scorpii should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 22 Scorpii:

Color of 22 Scorpii ⬤

Magnitude of 22 Scorpii 4.79

Class Main-sequence

VISIBILITY RIGHT NOW

22 Scorpii is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -16.4°
Azimuth: 250.1°
Direction: West-South-West

Celestial coordinates and finder chart of 22 Scorpii

22 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 22 Scorpii are provided in the following table:

Right Ascension J2000 16h 30m 12s

Declination J2000 -25° 06’ 53”

Galactic Longitude 353.1°

Galactic Latitude 15.8°

Constellation Scorpius

The simplified sky map below shows the position of 22 Scorpii in the sky:

Simplified finder chart for 22 Scorpii.

Visibility of 22 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 22 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: 115.1° RISE 8:03

Max altitude: 13.4° TRANSIT 11:38

Azimuth: 244.9° SET 15:12

Digitized Sky Survey image of 22 Scorpii

The image below is a photograph of 22 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 22 Scorpii is -0.008 arcsec per year in Right Ascension and -0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 22 Scorpii. The red arrow shows the motion of 22 Scorpii during the next 10000 years (-1.33 arcmin in Right Ascension and -3.67 arcmin in declination);

Distance of 22 Scorpii from the Sun and relative movement

22 Scorpii is distant 392.77 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

Distance (parsec) 120.48 pc

Distance (light year) 392.77 ly

Heliocentric radial velocity 4 km/s

Proper Motion RA -0.008 arcsec/year

Proper Motion Dec -0.022 arcsec/year

Spectral properties of 22 Scorpii

22 Scorpii belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.61

Spectral Type B2V

Color Index (B-V) -0.11

Temperature of 22 Scorpii 11744K

The red dot in the diagram below shows where 22 Scorpii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 22 Scorpii. Attribution: Richard Powell / CC BY-SA

Alternative designations of 22 Scorpii

Flamsteed designation 22 Scorpii

Henry Draper Catalogue HD148605

SAO Catalogue SAO184429

Hipparcos Catalogue HIP80815

Durchmusterung Catalogue CD-2412695

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