HR4816

Above the horizon. Rise: 3:24 | Tran: 13:40 | Set: 23:57

Alt: 42.19° Az: 82.56° Direction: East

HR4816 is a variable hypergiant star of spectral class A0 in the constellation of Canes Venatici.

HR4816 visual magnitude is 6.45. Because of its faintness, HR4816 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 HR4816. The red arrow shows the motion of HR4816 during the next 10000 years (3.67 arcmin in Right Ascension and -1.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 12h 40m 28s

Declination +35° 48’ 59”

Hour Angle 19h 40m 10s

Sideral Time 08h 20m 38s

J2000

Right Ascension 12h 39m 16s

Declination +35° 57’ 06”

Galactic Coordinates

Galactic Longitude 138.51°

Galactic Latitude 80.81°

Finder Chart

Simplified finder chart for HR4816.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.45

Class Hypergiant

HR4816 is also a SrCrEu chemically peculiar star.

Absolute magnitude 0.50

Spectral Type A0

Color Index (B-V) 0.06

Temperature 9434K

The red dot in the diagram below shows where HR4816 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4816. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR4816 is distant 505.43 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 155.04

Distance (light year) 505.43

Radial Speed -15 km/s

Proper Motion RA 0.022 arcsec/y

Proper Motion Dec -0.006"/y

Alternative Designations

Henry Draper Catalogue HD110066

SAO Catalogue SAO63118

Hipparcos Catalogue HIP61748

Durchmusterung Catalogue BD+36 2295

FK5 Catalogue 3013

General Catalogue of Variable Stars AX CVn

Visibility from Your Location

Today's HR4816 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 54.2° RISE 3:24

Max altitude: 74.3° TRANSIT 13:40

Azimuth: 305.8° SET 23:57

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Canes Venatici