HR7903

Above the horizon. Rise: 21:41 | Tran: 5:43 | Set: 13:42

Alt: 58.04° Az: 208.12° Direction: South-South-West

HR7903 is a variable hypergiant star of spectral class A0 in the constellation of Vulpecula.

HR7903 visual magnitude is 6.08. Because of its faintness, HR7903 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 HR7903. The red arrow shows the motion of HR7903 during the next 10000 years (3.17 arcmin in Right Ascension and 2.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 40m 18s

Declination +21° 54’ 28”

Hour Angle 01h 02m 23s

Sidereal Time 21h 42m 41s

J2000

Right Ascension 20h 39m 10s

Declination +21° 49’ 01”

Galactic Coordinates

Galactic Longitude 65.2°

Galactic Latitude -11.82°

Finder Chart

Loading map...

Finder chart for HR7903.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.08

Class Hypergiant

Absolute magnitude -1.19

Spectral Type A0III

Color Index (B-V) -0.06

Temperature 10941K

The red dot in the diagram below shows where HR7903 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7903. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR7903 is distant 926.14 light years from the Sun and it is moving towards the Sun at the speed of 37 kilometers per second.

Distance (parsec) 284.09

Distance (light year) 926.14

Radial Speed -37 km/s

Proper Motion RA 0.019 arcsec/y

Proper Motion Dec 0.014"/y

Alternative Designations

Henry Draper Catalogue HD196821

SAO Catalogue SAO88959

Hipparcos Catalogue HIP101919

Durchmusterung Catalogue BD+21 4305

General Catalogue of Variable Stars 13201

Visibility from Your Location

Today's HR7903 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 68.1° RISE 21:41

Max altitude: 60.4° TRANSIT 5:43

Azimuth: 291.9° SET 13:42

Set Location

Other stars in Vulpecula