1 Scorpii

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

1 Scorpii visual magnitude is 4.64. Because of its moderate brightness, 1 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 1 Scorpii:

Color of 1 Scorpii ⬤

Magnitude of 1 Scorpii 4.64

Class Main-sequence

VISIBILITY RIGHT NOW 1 Scorpii is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of 1 Scorpii

1 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 1 Scorpii are provided in the following table:

Right Ascension J2000 15h 50m 58s

Declination J2000 -25° 45’ 05”

Galactic Longitude 346.1°

Galactic Latitude 21.71°

Constellation Scorpius

The simplified sky map below shows the position of 1 Scorpii in the sky:

Simplified finder chart for 1 Scorpii.

Visibility of 1 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 1 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: 115.8° RISE 20:32

Max altitude: 12.8° TRANSIT 0:02

Azimuth: 244.2° SET 3:35

RIGHT NOW 1 Scorpii is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 1 Scorpii

The image below is a photograph of 1 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 1 Scorpii is -0.018 arcsec per year in Right Ascension and -0.024 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 1 Scorpii. The red arrow shows the motion of 1 Scorpii during the next 10000 years (-3.00 arcmin in Right Ascension and -4.00 arcmin in declination);

Distance of 1 Scorpii from the Sun and relative movement

1 Scorpii is distant 521.60 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

Distance (parsec) 160.00 pc

Distance (light year) 521.60 ly

Heliocentric radial velocity 3 km/s

Proper Motion RA -0.018 arcsec/year

Proper Motion Dec -0.024 arcsec/year

Spectral properties of 1 Scorpii

1 Scorpii belongs to spectral class B3 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -1.38

Spectral Type B3V

Color Index (B-V) -0.05

Temperature of 1 Scorpii 10795K

The red dot in the diagram below shows where 1 Scorpii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 1 Scorpii. Attribution: Richard Powell / CC BY-SA

Alternative designations of 1 Scorpii

Flamsteed designation 1 Scorpii

Henry Draper Catalogue HD141637

SAO Catalogue SAO183854

Hipparcos Catalogue HIP77635

Durchmusterung Catalogue CD-2511131

In Evidence

Other stars in Scorpius