HR820

Above the horizon. Rise: 17:52 | Tran: 4:10 | Set: 14:24

Alt: 0.03° Az: 20.72° Direction: North-North-East

HR820 is a multiple main-sequence star of spectral class A9 in the constellation of Perseus.

HR820 visual magnitude is 6.3. Because of its faintness, HR820 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 HR820. The red arrow shows the motion of HR820 during the next 10000 years (-7.17 arcmin in Right Ascension and -7.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 02h 48m 35s

Declination +35° 39’ 26”

Hour Angle 13h 43m 15s

Sideral Time 16h 31m 50s

J2000

Right Ascension 02h 47m 03s

Declination +35° 33’ 17”

Galactic Coordinates

Galactic Longitude 147.96°

Galactic Latitude -21.64°

Finder Chart

Simplified finder chart for HR820.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.3

Class Main-sequence

Absolute magnitude 2.94

Spectral Type A9V

Color Index (B-V)

Temperature 10125K

The red dot in the diagram below shows where HR820 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR820. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR820 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR820 double sysyem:

Main star magnitude 6.3

Secondary star magnitude 8.4

Magnitude difference 2.1

Separation 1.5 arcsec

Distance, Radial Speed, Proper Motion

HR820 is distant 153.48 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

Distance (parsec) 47.08

Distance (light year) 153.48

Radial Speed -4 km/s

Proper Motion RA -0.043 arcsec/y

Proper Motion Dec -0.047"/y

Alternative Designations

Henry Draper Catalogue HD17240

SAO Catalogue SAO55872

Hipparcos Catalogue HIP12990

Durchmusterung Catalogue BD+34 513

Aitken Double Star Catalogue ADS2117

Visibility from Your Location

Today's HR820 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 54.3° RISE 17:52

Max altitude: 74.2° TRANSIT 4:10

Azimuth: 305.7° SET 14:24

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

Location

Other stars in Perseus