HR4812

Above the horizon. Rise: 5:45 | Tran: 13:48 | Set: 21:51

Alt: 34.12° Az: 96.21° Direction: East

HR4812 is a double giant star of spectral class K1 in the constellation of Coma Berenices.

HR4812 visual magnitude is 6.38. Because of its faintness, HR4812 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 HR4812. The red arrow shows the motion of HR4812 during the next 10000 years (-8.33 arcmin in Right Ascension and -2.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 12h 40m 15s

Declination +22° 31’ 26”

Hour Angle 19h 48m 01s

Sideral Time 08h 28m 17s

J2000

Right Ascension 12h 39m 02s

Declination +22° 39’ 33”

Galactic Coordinates

Galactic Longitude 270.09°

Galactic Latitude 84.72°

Finder Chart

Simplified finder chart for HR4812.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.38

Class Giant

Absolute magnitude 1.14

Spectral Type K1III

Color Index (B-V) 1.1

Temperature 4515K

The red dot in the diagram below shows where HR4812 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4812. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR4812 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR4812 double sysyem:

Main star magnitude 6.38

Secondary star magnitude 12.38

Magnitude difference 6

Separation 32.8 arcsec

Distance, Radial Speed, Proper Motion

HR4812 is distant 364.25 light years from the Sun and it is moving towards the Sun at the speed of 27 kilometers per second.

Distance (parsec) 111.73

Distance (light year) 364.25

Radial Speed -27 km/s

Proper Motion RA -0.05 arcsec/y

Proper Motion Dec -0.016"/y

Alternative Designations

Henry Draper Catalogue HD109996

SAO Catalogue SAO82420

Hipparcos Catalogue HIP61719

Durchmusterung Catalogue BD+23 2479

Visibility from Your Location

Today's HR4812 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 67.5° RISE 5:45

Max altitude: 61.0° TRANSIT 13:48

Azimuth: 292.5° SET 21:51

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

Location

Other stars in Coma Berenices