Alphecca - α Coronae Borealis (alpha Coronae Borealis)

Above the horizon. Rise: 6:35 | Tran: 15:09 | Set: 23:42

Alt: 64.04° Az: 159.35° Direction: South-South-East

Alphecca, also designated as α Coronae Borealis (alpha Coronae Borealis), is a variable hypergiant star of spectral class A0 in the constellation of Corona Borealis.

Alphecca visual magnitude is 2.23, making it the 65th brightest star in the sky. Because of its brightness, Alphecca is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of Alphecca - α Coronae Borealis (alpha Coronae Borealis) star

DSS2 image of Alphecca. The red arrow shows the motion of Alphecca during the next 1000 years (2.02 arcmin in Right Ascension and -1.48 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 35m 44s

Declination +26° 37’ 59”

Hour Angle 23h 20m 12s

Sideral Time 14h 55m 56s

J2000

Right Ascension 15h 34m 41s

Declination +26° 42’ 52”

Galactic Coordinates

Galactic Longitude 41.87°

Galactic Latitude 53.77°

Finder Chart

Simplified finder chart for Alphecca - α Coronae Borealis (alpha Coronae Borealis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 2.23

Class Hypergiant

Absolute magnitude 0.43

Spectral Type A0V

Color Index (B-V) -0.02

Temperature 10382K

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

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

Distance, Radial Speed, Proper Motion

Alphecca is distant 74.68 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

Distance (parsec) 22.91

Distance (light year) 74.68

Radial Speed 2 km/s

Proper Motion RA 0.121 arcsec/y

Proper Motion Dec -0.089"/y

Alternative Designations

Proper Name Alphecca

Bayer designation α Coronae Borealis
(alpha Coronae Borealis)

Flamsteed designation 5 Coronae Borealis

Henry Draper Catalogue HD139006

SAO Catalogue SAO83893

Hipparcos Catalogue HIP76267

Durchmusterung Catalogue BD+27 2512

FK5 Catalogue 578

General Catalogue of Variable Stars Alp CrB

Visibility from Your Location

Today's Alphecca - α Coronae Borealis (alpha Coronae Borealis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 63.4° RISE 6:35

Max altitude: 65.2° TRANSIT 15:09

Azimuth: 296.6° SET 23:42

Set Location

Other stars in Corona Borealis