HR5138

Above the horizon. Rise: 14:58 | Tran: 21:50 | Set: 4:46

Alt: 28.02° Az: 109.48° Direction: East-South-East

HR5138 is a variable and multiple hypergiant star of spectral class F0 in the constellation of Boötes.

HR5138 visual magnitude is 5.57. Because of its faintness, HR5138 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 HR5138. The red arrow shows the motion of HR5138 during the next 1000 years (-1.87 arcmin in Right Ascension and -0.22 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 13h 40m 50s

Declination +10° 37’ 04”

Hour Angle 20h 08m 34s

Sidereal Time 09h 49m 24s

J2000

Right Ascension 13h 39m 34s

Declination +10° 44’ 45”

Galactic Coordinates

Galactic Longitude 339.9°

Galactic Latitude 70.08°

Finder Chart

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Finder chart for HR5138.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.57

Class Hypergiant

Absolute magnitude 1.93

Spectral Type F0V

Color Index (B-V) 0.33

Temperature 7276K

The red dot in the diagram below shows where HR5138 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR5138. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR5138 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 HR5138 double sysyem:

Main star magnitude 5.57

Secondary star magnitude 5.77

Magnitude difference 0.2

Separation 0.1 arcsec

Distance, Radial Speed, Proper Motion

HR5138 is distant 174.52 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

Distance (parsec) 53.53

Distance (light year) 174.52

Radial Speed -18 km/s

Proper Motion RA -0.112 arcsec/y

Proper Motion Dec -0.013"/y

Alternative Designations

Henry Draper Catalogue HD118889

SAO Catalogue SAO100654

Hipparcos Catalogue HIP66640

Durchmusterung Catalogue BD+11 2589

General Catalogue of Variable Stars 6363

Aitken Double Star Catalogue ADS8987

Visibility from Your Location

Today's HR5138 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 79.4° RISE 14:58

Max altitude: 49.1° TRANSIT 21:50

Azimuth: 280.6° SET 4:46

Set Location

Other stars in Boötes