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

16 Sagittarii

16 Sagittarii is a double bright giant star in the constellation of Sagittarius.

16 Sagittarii visual magnitude is 5.95. Because of its reltive faintness, 16 Sagittarii should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 16 Sagittarii:

5.95
Bright giant
16 Sagittarii is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 16 Sagittarii

16 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 16 Sagittarii are provided in the following table:

18h 15m 12s
-20° 23’ 17”
10.76°
-1.58°
Sagittarius

The simplified sky map below shows the position of 16 Sagittarii in the sky:

Finder chart 16 Sagittarii star
Simplified finder chart for 16 Sagittarii.

Visibility of 16 Sagittarii from your location

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

Today's 16 Sagittarii rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 110.4°
Max altitude: 18.1°
Azimuth: 249.6°
16 Sagittarii is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 16 Sagittarii

The image below is a photograph of 16 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 16 Sagittarii is -0.002 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 16 Sagittarii star
DSS2 image of 16 Sagittarii. The red arrow shows the motion of 16 Sagittarii during the next 100000 years (-3.33 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of 16 Sagittarii from the Sun and relative movement

16 Sagittarii is distant 32,600,000.00 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

10,000,000.00 pc
32,600,000.00 ly
-5 km/s
-0.002 arcsec/year
0.001 arcsec/year

Spectral properties of 16 Sagittarii

16 Sagittarii belongs to spectral class O9 and has a luminosity class of II corresponding to a bright giant star.

-24.05
O9II
9882K

The red dot in the diagram below shows where 16 Sagittarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 16 Sagittarii. Attribution: Richard Powell / CC BY-SA

16 Sagittarii star system properties

16 Sagittarii 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 16 Sagittarii double sysyem:

5.95
12.95
7
6 arcsec

Alternative designations of 16 Sagittarii

16 Sagittarii
SAO186544
SAO186544