ι Sagittarii (iota Sagittarii)

ι Sagittarii is a hypergiant star in the constellation of Sagittarius.

ι Sagittarii visual magnitude is 4.13. Because of its moderate brightness, ι Sagittarii 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 ι Sagittarii:

Color of ι Sagittarii ⬤

Magnitude of ι Sagittarii 4.13

Class Hypergiant

VISIBILITY RIGHT NOW ι Sagittarii (iota Sagittarii) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of ι Sagittarii

ι Sagittarii 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 ι Sagittarii are provided in the following table:

Right Ascension J2000 19h 55m 15s

Declination J2000 -41° 52’ 05”

Galactic Longitude 357.97°

Galactic Latitude -29.11°

Constellation Sagittarius

The simplified sky map below shows the position of ι Sagittarii in the sky:

Finder chart ι Sagittarii (iota Sagittarii) star

Simplified finder chart for ι Sagittarii (iota Sagittarii).

Visibility of ι Sagittarii from your location

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

ι Sagittarii (iota Sagittarii) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of ι Sagittarii

The image below is a photograph of ι Sagittarii 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 ι Sagittarii is 0.017 arcsec per year in Right Ascension and 0.056 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ι Sagittarii (iota Sagittarii) star

DSS2 image of ι Sagittarii. The red arrow shows the motion of ι Sagittarii during the next 10000 years (2.83 arcmin in Right Ascension and 9.33 arcmin in declination);

Distance of ι Sagittarii from the Sun and relative movement

ι Sagittarii is distant 189.10 light years from the Sun and it is moving far from the Sun at the speed of 36 kilometers per second.

Distance (parsec) 58.00 pc

Distance (light year) 189.10 ly

Heliocentric radial velocity 36 km/s

Proper Motion RA 0.017 arcsec/year

Proper Motion Dec 0.056 arcsec/year

Spectral properties of ι Sagittarii

ι Sagittarii belongs to spectral class K0 and has a luminosity class of II corresponding to a hypergiant star.

Absolute magnitude 0.31

Spectral Type K0II

Color Index (B-V) 1.08

Temperature of ι Sagittarii 4559K

The red dot in the diagram below shows where ι Sagittarii is situated in the Hertzsprung–Russell diagram.

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

Alternative designations of ι Sagittarii

Bayer designation ι Sagittarii
(iota Sagittarii)

Henry Draper Catalogue HD188114

SAO Catalogue SAO229927

Hipparcos Catalogue HIP98032

Durchmusterung Catalogue CD-4214549

FK5 Catalogue 1520

In Evidence

Other stars in Sagittarius