73 Herculis

Above the horizon. Rise: 8:56 | Tran: 17:02 | Set: 1:11

Alt: 33.48° Az: 94.62° Direction: East

73 Herculis is a variable hypergiant star of spectral class F0 in the constellation of Hercules.

73 Herculis visual magnitude is 5.74. Because of its faintness, 73 Herculis 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 73 Herculis. The red arrow shows the motion of 73 Herculis during the next 10000 years (-7.67 arcmin in Right Ascension and -5.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 17h 25m 08s

Declination +22° 56’ 20”

Hour Angle 19h 41m 54s

Sideral Time 13h 07m 02s

J2000

Right Ascension 17h 24m 06s

Declination +22° 57’ 37”

Galactic Coordinates

Galactic Longitude 45.53°

Galactic Latitude 28.86°

Finder Chart

Simplified finder chart for 73 Herculis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.74

Class Hypergiant

Absolute magnitude 2.58

Spectral Type F0IV

Color Index (B-V) 0.21

Temperature 8086K

The red dot in the diagram below shows where 73 Herculis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 73 Herculis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

73 Herculis is distant 139.50 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

Distance (parsec) 42.79

Distance (light year) 139.50

Radial Speed -20 km/s

Proper Motion RA -0.046 arcsec/y

Proper Motion Dec -0.032"/y

Alternative Designations

Flamsteed designation 73 Herculis

Henry Draper Catalogue HD157728

SAO Catalogue SAO85062

Hipparcos Catalogue HIP85157

Durchmusterung Catalogue BD+23 3100

FK5 Catalogue 3383

General Catalogue of Variable Stars 8606

Visibility from Your Location

Today's 73 Herculis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 67.1° RISE 8:56

Max altitude: 61.5° TRANSIT 17:02

Azimuth: 292.9° SET 1:11

Set Location

Other stars in Hercules