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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:04  
clear_day Transit: 12:06  
SunsetSet: 18:09
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All Constellations » Sagittarius » 

11 Sagittarii

Altitude: -3.3°   Azimuth: 125.0°   Direction: South-East

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 skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

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);

Key facts about 11 Sagittarii

4.98
Hypergiant

11 Sagittarii is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -3.3°
Azimuth: 125.0°
Direction: South-East

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 edit_location_alt
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 edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 113.7°
Max altitude: 14.8°
Azimuth: 246.3°

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