HR7975

Above the horizon. Rise: 14:13 | Tran: 20:39 | Set: 3:09

Alt: 44.14° Az: 178.11° Direction: South

HR7975 is a double hypergiant star of spectral class K0 in the constellation of Delphinus.

HR7975 visual magnitude is 6.21. Because of its faintness, HR7975 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 HR7975. The red arrow shows the motion of HR7975 during the next 10000 years (6.67 arcmin in Right Ascension and 1.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 51m 12s

Declination +05° 38’ 17”

Hour Angle 23h 54m 32s

Sideral Time 20h 45m 45s

J2000

Right Ascension 20h 49m 59s

Declination +05° 32’ 40”

Galactic Coordinates

Galactic Longitude 52.67°

Galactic Latitude -23.2°

Finder Chart

Simplified finder chart for HR7975.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.21

Class Hypergiant

Absolute magnitude 0.30

Spectral Type K0

Color Index (B-V) 0.98

Temperature 4791K

The red dot in the diagram below shows where HR7975 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7975. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7975 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR7975 double sysyem:

Main star magnitude 6.21

Secondary star magnitude 8.71

Magnitude difference 2.5

Separation 79.9 arcsec

Distance, Radial Speed, Proper Motion

HR7975 is distant 495.44 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

Distance (parsec) 151.98

Distance (light year) 495.44

Radial Speed -22 km/s

Proper Motion RA 0.04 arcsec/y

Proper Motion Dec 0.006"/y

Alternative Designations

Henry Draper Catalogue HD198404

SAO Catalogue SAO126267

Hipparcos Catalogue HIP102833

Durchmusterung Catalogue BD+05 4626

Visibility from Your Location

Today's HR7975 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 84.4° RISE 14:13

Max altitude: 44.2° TRANSIT 20:39

Azimuth: 275.6° SET 3:09

Set Location

Other stars in Delphinus