HR8138

Altitude: 5.7° Azimuth: 343.6° Direction: North-North-West

HR8138 is a star in the constellation of Cygnus.

HR8138 visual magnitude is 6.43. Because of its reltive faintness, HR8138 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 HR8138:

Color of HR8138 ⬤

Magnitude of HR8138 6.43

Class

VISIBILITY RIGHT NOW

HR8138 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 5.7°
Azimuth: 343.6°
Direction: North-North-West

Celestial coordinates and finder chart of HR8138

HR8138 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 HR8138 are provided in the following table:

Right Ascension J2000 21h 16m 29s

Declination J2000 +42° 15’ 05”

Galactic Longitude 86.14°

Galactic Latitude -4.76°

Constellation Cygnus

The simplified sky map below shows the position of HR8138 in the sky:

Simplified finder chart for HR8138.

Visibility of HR8138 from your location

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

HR8138 is circumpolar and transits at 04:27 UTC (altitude: 80.8°)

Digitized Sky Survey image of HR8138

The image below is a photograph of HR8138 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 HR8138 is 0.003 arcsec per year in Right Ascension and -0.028 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR8138. The red arrow shows the motion of HR8138 during the next 10000 years (0.50 arcmin in Right Ascension and -4.67 arcmin in declination);

Distance of HR8138 from the Sun and relative movement

HR8138 is distant 864.72 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

Distance (parsec) 265.25 pc

Distance (light year) 864.72 ly

Heliocentric radial velocity 8 km/s

Proper Motion RA 0.003 arcsec/year

Proper Motion Dec -0.028 arcsec/year

Spectral properties of HR8138

HR8138 belongs to spectral class K2

Absolute magnitude -0.69

Spectral Type K2

Color Index (B-V)

Temperature of HR8138 10125K

The red dot in the diagram below shows where HR8138 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8138. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8138

Henry Draper Catalogue HD202720

SAO Catalogue SAO50656

Hipparcos Catalogue HIP105034

Durchmusterung Catalogue BD+41 4067

In Evidence

Other stars in Cygnus