28 Sagittarii

Above the horizon. Rise: 23:53 | Tran: 3:51 | Set: 7:46

Alt: 3.88° Az: 225.76° Direction: South-West

28 Sagittarii is a double giant star of spectral class K4 in the constellation of Sagittarius.

28 Sagittarii visual magnitude is 5.37. Because of its faintness, 28 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 28 Sagittarii. The red arrow shows the motion of 28 Sagittarii during the next 10000 years (5.17 arcmin in Right Ascension and 0.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 47m 52s

Declination -22° 21’ 48”

Hour Angle 03h 22m 28s

Sidereal Time 22h 10m 21s

J2000

Right Ascension 18h 46m 20s

Declination -22° 23’ 31”

Galactic Coordinates

Galactic Longitude 12.28°

Galactic Latitude -8.94°

Finder Chart

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Finder chart for 28 Sagittarii.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.37

Class Giant

Absolute magnitude -2.60

Spectral Type K4III

Color Index (B-V) 1.64

Temperature 3594K

The red dot in the diagram below shows where 28 Sagittarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 28 Sagittarii. Attribution: Richard Powell / CC BY-SA

Star System Properties

28 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 28 Sagittarii double sysyem:

Main star magnitude 5.37

Secondary star magnitude 13.07

Magnitude difference 7.7

Separation 13.7 arcsec

Distance, Radial Speed, Proper Motion

28 Sagittarii is distant 1,278.43 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

Distance (parsec) 392.16

Distance (light year) 1,278.43

Radial Speed -3 km/s

Proper Motion RA 0.031 arcsec/y

Alternative Designations

Flamsteed designation 28 Sagittarii

Henry Draper Catalogue HD173460

SAO Catalogue SAO187255

Hipparcos Catalogue HIP92111

Durchmusterung Catalogue BD-22 4854

Aitken Double Star Catalogue ADS11652

Visibility from Your Location

Today's 28 Sagittarii rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 112.4° RISE 23:53

Max altitude: 16.2° TRANSIT 3:51

Azimuth: 247.6° SET 7:46

Set Location

Other stars in Sagittarius