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

11 Sagittarii

11 Sagittarii is a double hypergiant star in the constellation of Sagittarius.

11 Sagittarii visual magnitude is 4.98. Because of its moderate brightness, 11 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 11 Sagittarii:

4.98
Hypergiant
11 Sagittarii is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 11 Sagittarii

11 Sagittarii is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 11 Sagittarii are provided in the following table:

18h 11m 43s
-23° 42’ 03”
7.46°
-2.45°
Sagittarius

The simplified sky map below shows the position of 11 Sagittarii in the sky:

Finder chart 11 Sagittarii star
Simplified finder chart for 11 Sagittarii.

Visibility of 11 Sagittarii from your location

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

Today's 11 Sagittarii rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 113.7°
Max altitude: 14.8°
Azimuth: 246.3°
11 Sagittarii is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 11 Sagittarii

The image below is a photograph of 11 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 11 Sagittarii is 0.017 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 11 Sagittarii star
DSS2 image of 11 Sagittarii. The red arrow shows the motion of 11 Sagittarii during the next 10000 years (2.83 arcmin in Right Ascension and -3.17 arcmin in declination);

Distance of 11 Sagittarii from the Sun and relative movement

11 Sagittarii is distant 244.19 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

74.91 pc
244.19 ly
4 km/s
0.017 arcsec/year
-0.019 arcsec/year

Spectral properties of 11 Sagittarii

11 Sagittarii belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

0.61
K0III
4626K

The red dot in the diagram below shows where 11 Sagittarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 11 Sagittarii. Attribution: Richard Powell / CC BY-SA

11 Sagittarii star system properties

11 Sagittarii is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 11 Sagittarii double sysyem:

4.98
10.68
5.7
42.1 arcsec

Alternative designations of 11 Sagittarii

11 Sagittarii
SAO186437
SAO186437