HR688

Below the horizon. Never rises today

Alt: -27.73° Az: 212.81° Direction: South-South-West

HR688 is a double giant star of spectral class K5 in the constellation of Horologium.

HR688 visual magnitude is 5.81. Because of its faintness, HR688 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 HR688. The red arrow shows the motion of HR688 during the next 10000 years (4.33 arcmin in Right Ascension and 3.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 02h 20m 42s

Declination -55° 49’ 54”

Hour Angle 03h 54m 35s

Sideral Time 06h 15m 18s

J2000

Right Ascension 02h 19m 54s

Declination -55° 56’ 40”

Galactic Coordinates

Galactic Longitude 280.1°

Galactic Latitude -57.09°

Finder Chart

Simplified finder chart for HR688.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.81

Class Giant

Absolute magnitude -0.38

Spectral Type K5III

Color Index (B-V) 1.55

Temperature 3720K

The red dot in the diagram below shows where HR688 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR688. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR688 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 HR688 double sysyem:

Main star magnitude 5.81

Secondary star magnitude 10.91

Magnitude difference 5.1

Separation 33.8 arcsec

Distance, Radial Speed, Proper Motion

HR688 is distant 564.01 light years from the Sun and it is moving far from the Sun at the speed of 49 kilometers per second.

Distance (parsec) 173.01

Distance (light year) 564.01

Radial Speed 49 km/s

Proper Motion RA 0.026 arcsec/y

Proper Motion Dec 0.02"/y

Alternative Designations

Henry Draper Catalogue HD14641

SAO Catalogue SAO232717

Hipparcos Catalogue HIP10871

Durchmusterung Catalogue CP-56 413

FK5 Catalogue 2158

Visibility from Your Location

HR688 is currently not visible from Greenwich, UK

Set Location

Other stars in Horologium