HR7815

Altitude: 47.8° Azimuth: 57.5° Direction: East-North-East

HR7815 is a giant star in the constellation of Cygnus.

HR7815 visual magnitude is 6.51. Because of its reltive faintness, HR7815 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 HR7815:

Color of HR7815 ⬤

Magnitude of HR7815 6.51

Class Giant

VISIBILITY RIGHT NOW

HR7815 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 47.8°
Azimuth: 57.5°
Direction: East-North-East

Celestial coordinates and finder chart of HR7815

HR7815 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 HR7815 are provided in the following table:

Right Ascension J2000 20h 24m 32s

Declination J2000 +53° 33’ 06”

Galactic Longitude 89.38°

Galactic Latitude 9.08°

Constellation Cygnus

The simplified sky map below shows the position of HR7815 in the sky:

Simplified finder chart for HR7815.

Visibility of HR7815 from your location

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

HR7815 is circumpolar and transits at 15:04 UTC (altitude: 87.9°)

Digitized Sky Survey image of HR7815

The image below is a photograph of HR7815 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 HR7815 is 0.01 arcsec per year in Right Ascension and 0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7815. The red arrow shows the motion of HR7815 during the next 10000 years (1.67 arcmin in Right Ascension and 2.50 arcmin in declination);

Distance of HR7815 from the Sun and relative movement

HR7815 is distant 1,461.88 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

Distance (parsec) 448.43 pc

Distance (light year) 1,461.88 ly

Heliocentric radial velocity -19 km/s

Proper Motion RA 0.01 arcsec/year

Proper Motion Dec 0.015 arcsec/year

Spectral properties of HR7815

HR7815 belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.75

Spectral Type B9III

Color Index (B-V) 0.01

Temperature of HR7815 10002K

The red dot in the diagram below shows where HR7815 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7815. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7815

Henry Draper Catalogue HD194668

SAO Catalogue SAO32534

Hipparcos Catalogue HIP100651

Durchmusterung Catalogue BD+53 2397

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In Evidence

Other stars in Cygnus