4 Scorpii

Below the horizon. Rise: 16:19 | Tran: 21:36 | Set: 2:53

Alt: -6.12° Az: 244.17° Direction: West-South-West

4 Scorpii is a main-sequence star of spectral class A3 in the constellation of Scorpius.

4 Scorpii visual magnitude is 5.62. Because of its faintness, 4 Scorpii 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 4 Scorpii. The red arrow shows the motion of 4 Scorpii during the next 10000 years (-7.50 arcmin in Right Ascension and -3.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 57m 02s

Declination -26° 20’ 19”

Hour Angle 05h 48m 03s

Sidereal Time 21h 45m 06s

J2000

Right Ascension 15h 55m 30s

Declination -26° 15’ 56”

Galactic Coordinates

Galactic Longitude 346.52°

Galactic Latitude 20.64°

Finder Chart

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Finder chart for 4 Scorpii.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.62

Class Main-sequence

Absolute magnitude 0.01

Spectral Type A3V

Color Index (B-V) 0.15

Temperature 8571K

The red dot in the diagram below shows where 4 Scorpii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 4 Scorpii. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

4 Scorpii is distant 431.79 light years from the Sun and it is moving towards the Sun at the speed of 29 kilometers per second.

Distance (parsec) 132.45

Distance (light year) 431.79

Radial Speed -29 km/s

Proper Motion RA -0.045 arcsec/y

Proper Motion Dec -0.021"/y

Alternative Designations

Flamsteed designation 4 Scorpii

Henry Draper Catalogue HD142445

SAO Catalogue SAO183931

Hipparcos Catalogue HIP77984

Durchmusterung Catalogue CD-2511190

Visibility from Your Location

Today's 4 Scorpii rise, transit and set times from Khun Tan, Thailand are the following (all times relative to the local timezone Asia/Bangkok):

Azimuth: 116.3° RISE 16:19

Max altitude: 43.8° TRANSIT 21:36

Azimuth: 243.7° SET 2:53

Name:	Khun Tan, Thailand
Latitude:	19° 50' 0.6" N
Longitude:	100° 15' 32.4" E
Timezone:	Asia/Bangkok

Set Location

Other stars in Scorpius