HR8103

HR8103 is a variable sub-giant star in the constellation of Cygnus.

HR8103 visual magnitude is 6.63. Because of its reltive faintness, HR8103 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR8103:

Color of HR8103 ⬤

Magnitude of HR8103 6.63

Class Sub-giant

VISIBILITY RIGHT NOW HR8103 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 69°.

Celestial coordinates and finder chart of HR8103

HR8103 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8103 are provided in the following table:

Right Ascension J2000 21h 09m 58s

Declination J2000 +45° 30’ 08”

Galactic Longitude 87.7°

Galactic Latitude -1.68°

Constellation Cygnus

The simplified sky map below shows the position of HR8103 in the sky:

Simplified finder chart for HR8103.

Visibility of HR8103 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR8103 is circumpolar and transits at 04:32 UTC (altitude: 84.0°)

Digitized Sky Survey image of HR8103

The image below is a photograph of HR8103 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR8103 is 0.004 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR8103. The red arrow shows the motion of HR8103 during the next 100000 years (6.67 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of HR8103 from the Sun and relative movement

HR8103 is distant 1,093.96 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

Distance (parsec) 335.57 pc

Distance (light year) 1,093.96 ly

Heliocentric radial velocity 9 km/s

Proper Motion RA 0.004 arcsec/year

Proper Motion Dec -0.001 arcsec/year

Spectral properties of HR8103

HR8103 belongs to spectral class B4 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -1.00

Spectral Type B4IV

Color Index (B-V) -0.16

Temperature of HR8103 12692K

The red dot in the diagram below shows where HR8103 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8103. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8103

Henry Draper Catalogue HD201733

SAO Catalogue SAO50521

Hipparcos Catalogue HIP104483

Durchmusterung Catalogue BD+44 3718

General Catalogue of Variable Stars Var?

In Evidence

Other stars in Cygnus