Your guide to the Solar System and the night sky
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🌎  Greenwich, United Kingdom [change]

ι2 Scorpii (iota2 Scorpii)

ι2 Scorpii is a double supergiant star in the constellation of Scorpius.

ι2 Scorpii visual magnitude is 4.81. Because of its moderate brightness, ι2 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 ι2 Scorpii:

4.81
Supergiant
ι2 Scorpii (iota2 Scorpii) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of ι2 Scorpii

ι2 Scorpii is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ι2 Scorpii are provided in the following table:

17h 50m 11s
-40° 05’ 26”
350.89°
-6.54°
Scorpius

The simplified sky map below shows the position of ι2 Scorpii in the sky:

Finder chart ι2 Scorpii (iota2 Scorpii) star
Simplified finder chart for ι2 Scorpii (iota2 Scorpii).

Visibility of ι2 Scorpii from your location

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

ι2 Scorpii (iota2 Scorpii) is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of ι2 Scorpii

The image below is a photograph of ι2 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 ι2 Scorpii is 0.007 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of ι2 Scorpii (iota2 Scorpii) star
DSS2 image of ι2 Scorpii. The red arrow shows the motion of ι2 Scorpii during the next 100000 years (11.67 arcmin in Right Ascension and -13.33 arcmin in declination);

Distance of ι2 Scorpii from the Sun and relative movement

ι2 Scorpii is distant 3,704.55 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

1,136.36 pc
3,704.55 ly
-10 km/s
0.007 arcsec/year
-0.008 arcsec/year

Spectral properties of ι2 Scorpii

ι2 Scorpii belongs to spectral class A2 and has a luminosity class of I corresponding to a supergiant star.

-5.47
A2I
7726K

The red dot in the diagram below shows where ι2 Scorpii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ι2 Scorpii. Attribution: Richard Powell / CC BY-SA

ι2 Scorpii star system properties

ι2 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 ι2 Scorpii double sysyem:

4.81
10.91
6.1
32.6 arcsec

Alternative designations of ι2 Scorpii

ι2 Scorpii
(iota2 Scorpii)
SAO228466
SAO228466