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:

Color of 16 Sagittarii ⬤

Magnitude of 16 Sagittarii 5.95

Class Bright giant

VISIBILITY RIGHT NOW 16 Sagittarii is above the horizon from Greenwich, United Kingdom [change]. Altitude: 5°.

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:

Right Ascension J2000 18h 15m 12s

Declination J2000 -20° 23’ 17”

Galactic Longitude 10.76°

Galactic Latitude -1.58°

Constellation Sagittarius

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

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° RISE 2:50

Max altitude: 18.1° TRANSIT 6:57

Azimuth: 249.6° SET 11:04

RIGHT NOW 16 Sagittarii is above 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.

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.

Distance (parsec) 10,000,000.00 pc

Distance (light year) 32,600,000.00 ly

Heliocentric radial velocity -5 km/s

Proper Motion RA -0.002 arcsec/year

Proper Motion Dec 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.

Absolute magnitude -24.05

Spectral Type O9II

Color Index (B-V) 0.02

Temperature of 16 Sagittarii 9882K

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

Main star magnitude 5.95

Secondary star magnitude 12.95

Magnitude difference 7

Separation 6 arcsec

Alternative designations of 16 Sagittarii

Flamsteed designation 16 Sagittarii

Henry Draper Catalogue HD167263

SAO Catalogue SAO186544

Hipparcos Catalogue HIP89440

Durchmusterung Catalogue BD-20 5055

Aitken Double Star Catalogue ADS11191

How to support us

In Evidence

Other stars in Sagittarius