HR7555

HR7555 is a multiple giant star in the constellation of Cygnus.

HR7555 visual magnitude is 6.11. Because of its reltive faintness, HR7555 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 HR7555:

Color of HR7555 ⬤

Magnitude of HR7555 6.11

Class Giant

VISIBILITY RIGHT NOW HR7555 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 32°.

Celestial coordinates and finder chart of HR7555

HR7555 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 HR7555 are provided in the following table:

Right Ascension J2000 19h 49m 27s

Declination J2000 +38° 42’ 36”

Galactic Longitude 73.45°

Galactic Latitude 6.39°

Constellation Cygnus

The simplified sky map below shows the position of HR7555 in the sky:

Simplified finder chart for HR7555.

Visibility of HR7555 from your location

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

HR7555 is circumpolar and transits at 07:07 UTC (altitude: 77.2°)

Digitized Sky Survey image of HR7555

The image below is a photograph of HR7555 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 HR7555 is 0.006 arcsec per year in Right Ascension and -0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7555. The red arrow shows the motion of HR7555 during the next 10000 years (1.00 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of HR7555 from the Sun and relative movement

HR7555 is distant 696.58 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

Distance (parsec) 213.68 pc

Distance (light year) 696.58 ly

Heliocentric radial velocity 11 km/s

Proper Motion RA 0.006 arcsec/year

Proper Motion Dec -0.01 arcsec/year

Spectral properties of HR7555

HR7555 belongs to spectral class G5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.54

Spectral Type G5III

Color Index (B-V) 0.9

Temperature of HR7555 4996K

The red dot in the diagram below shows where HR7555 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7555. Attribution: Richard Powell / CC BY-SA

HR7555 star system properties

HR7555 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 HR7555 double sysyem:

Main star magnitude 6.11

Secondary star magnitude 11.01

Magnitude difference 4.9

Separation 11.6 arcsec

Alternative designations of HR7555

Henry Draper Catalogue HD187638

SAO Catalogue SAO68909

Hipparcos Catalogue HIP97538

Durchmusterung Catalogue BD+38 3772

Aitken Double Star Catalogue ADS12992

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Other stars in Cygnus