HR8105

Above the horizon. Rise: 11:47 | Tran: 22:15 | Set: 8:46

Alt: 74.90° Az: 176.79° Direction: South

HR8105 is a variable and double main-sequence star of spectral class B1 in the constellation of Cygnus.

HR8105 visual magnitude is 6.54. Because of its faintness, HR8105 is not visible to the naked eye.

DSS2 image of HR8105. The red arrow shows the motion of HR8105 during the next 10000 years (3.50 arcmin in Right Ascension and -2.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 21h 12m 03s

Declination +36° 24’ 04”

Hour Angle 23h 55m 51s

Sideral Time 21h 07m 54s

J2000

Right Ascension 21h 11m 03s

Declination +36° 17’ 57”

Galactic Coordinates

Galactic Longitude 81.05°

Galactic Latitude -8.08°

Finder Chart

Simplified finder chart for HR8105.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.54

Class Main-sequence

Absolute magnitude -3.23

Spectral Type B1V

Color Index (B-V) -0.14

Temperature 12293K

The red dot in the diagram below shows where HR8105 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8105. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR8105 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR8105 double sysyem:

Main star magnitude 6.54

Secondary star magnitude 12.24

Magnitude difference 5.7

Separation 21.5 arcsec

Distance, Radial Speed, Proper Motion

HR8105 is distant 2,936.94 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

Distance (parsec) 900.90

Distance (light year) 2,936.94

Radial Speed -6 km/s

Proper Motion RA 0.021 arcsec/y

Proper Motion Dec -0.015"/y

Alternative Designations

Henry Draper Catalogue HD201819

SAO Catalogue SAO71032

Hipparcos Catalogue HIP104579

Durchmusterung Catalogue BD+35 4426

General Catalogue of Variable Stars Var

Aitken Double Star Catalogue ADS14724

Visibility from Your Location

Today's HR8105 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 53.6° RISE 11:47

Max altitude: 74.9° TRANSIT 22:15

Azimuth: 306.4° SET 8:46

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

Location

Other stars in Cygnus