18 Sagittarii

Below the horizon. Rise: 16:44 | Tran: 19:30 | Set: 22:15

Alt: -64.28° Az: 315.80° Direction: North-West

18 Sagittarii is a hypergiant star of spectral class K0 in the constellation of Sagittarius.

18 Sagittarii visual magnitude is 5.6. Because of its faintness, 18 Sagittarii is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 18 Sagittarii. The red arrow shows the motion of 18 Sagittarii during the next 1000 years (-2.05 arcmin in Right Ascension and -1.20 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 26m 37s

Declination -30° 44’ 28”

Hour Angle 10h 37m 33s

Sideral Time 05h 04m 10s

J2000

Right Ascension 18h 25m 01s

Declination -30° 45’ 24”

Galactic Coordinates

Galactic Longitude 2.57°

Galactic Latitude -8.35°

Finder Chart

Simplified finder chart for 18 Sagittarii.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.6

Class Hypergiant

Absolute magnitude -0.91

Spectral Type K0III

Color Index (B-V) 1.14

Temperature 4430K

The red dot in the diagram below shows where 18 Sagittarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 18 Sagittarii. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

18 Sagittarii is distant 653.31 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

Distance (parsec) 200.40

Distance (light year) 653.31

Radial Speed -19 km/s

Proper Motion RA -0.123 arcsec/y

Proper Motion Dec -0.072"/y

Alternative Designations

Flamsteed designation 18 Sagittarii

Henry Draper Catalogue HD169233

SAO Catalogue SAO210116

Hipparcos Catalogue HIP90260

Durchmusterung Catalogue CD-3015661

Visibility from Your Location

Today's 18 Sagittarii rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 120.7° RISE 16:44

Max altitude: 7.8° TRANSIT 19:30

Azimuth: 239.3° SET 22:15

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Sagittarius