HR7807

Below the horizon. Rise: 16:18 | Tran: 3:18 | Set: 14:15

Alt: -0.46° Az: 8.57° Direction: South-West

HR7807 is a variable main-sequence star of spectral class B2 in the constellation of Cygnus.

HR7807 visual magnitude is 5.9. Because of its faintness, HR7807 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 HR7807. The red arrow shows the motion of HR7807 during the next 100000 years (6.67 arcmin in Right Ascension and -6.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 24m 41s

Declination +37° 33’ 35”

Hour Angle 12h 43m 21s

Sidereal Time 09h 08m 02s

J2000

Right Ascension 20h 23m 44s

Declination +37° 28’ 35”

Galactic Coordinates

Galactic Longitude 76.04°

Galactic Latitude 0.04°

Finder Chart

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Finder chart for HR7807.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.9

Class Main-sequence

Absolute magnitude -1.29

Spectral Type B2V

Color Index (B-V) -0.2

Temperature 13585K

The red dot in the diagram below shows where HR7807 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7807. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR7807 is distant 893.15 light years from the Sun and it is moving towards the Sun at the speed of 30 kilometers per second.

Distance (parsec) 273.97

Distance (light year) 893.15

Radial Speed -30 km/s

Proper Motion RA 0.004 arcsec/y

Proper Motion Dec -0.004"/y

Alternative Designations

Henry Draper Catalogue HD194335

SAO Catalogue SAO69951

Hipparcos Catalogue HIP100574

Durchmusterung Catalogue BD+37 3916

General Catalogue of Variable Stars Var?

Visibility from Your Location

Today's HR7807 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 52.4° RISE 16:18

Max altitude: 76.1° TRANSIT 3:18

Azimuth: 307.6° SET 14:15

Set Location

Other stars in Cygnus