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

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:

ι Sagittarii (iota Sagittarii) is below the horizon from Greenwich, United Kingdom [change].

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 emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ι Sagittarii are provided in the following table:

19h 55m 15s
-41° 52’ 05”

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 [change]
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 [change]

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.

58.00 pc
189.10 ly
36 km/s
0.017 arcsec/year
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.


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

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

Alternative designations of ι Sagittarii

ι Sagittarii
(iota Sagittarii)