HR2431

Below the horizon. Rise: 13:53 | Tran: 15:27 | Set: 17:00

Alt: -16.89° Az: 232.59° Direction: South-West

HR2431 is a double hypergiant star of spectral class G0 in the constellation of Columba.

HR2431 visual magnitude is 6.35. Because of its faintness, HR2431 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 HR2431. The red arrow shows the motion of HR2431 during the next 1000 years (-0.97 arcmin in Right Ascension and -1.58 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 06h 36m 47s

Declination -36° 06’ 40”

Hour Angle 04h 40m 43s

Sidereal Time 11h 17m 30s

J2000

Right Ascension 06h 35m 53s

Declination -36° 05’ 20”

Galactic Coordinates

Galactic Longitude 244.7°

Galactic Latitude -18.5°

Finder Chart

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Finder chart for HR2431.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.35

Class Hypergiant

Absolute magnitude 3.32

Spectral Type G0V

Color Index (B-V) 0.48

Temperature 6481K

The red dot in the diagram below shows where HR2431 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR2431. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR2431 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 HR2431 double sysyem:

Main star magnitude 6.35

Secondary star magnitude 6.75

Magnitude difference 0.4

Separation 0.2 arcsec

Distance, Radial Speed, Proper Motion

HR2431 is distant 131.29 light years from the Sun and it is moving far from the Sun at the speed of 28 kilometers per second.

Distance (parsec) 40.27

Distance (light year) 131.29

Radial Speed 28 km/s

Proper Motion RA -0.058 arcsec/y

Proper Motion Dec -0.095"/y

Alternative Designations

Henry Draper Catalogue HD47230

SAO Catalogue SAO196987

Hipparcos Catalogue HIP31509

Durchmusterung Catalogue CD-35 3005

Visibility from Your Location

Today's HR2431 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 126.1° RISE 13:53

Max altitude: 2.4° TRANSIT 15:27

Azimuth: 233.9° SET 17:00

Set Location

Other stars in Columba