HR7743

Altitude: 13.9° Azimuth: 307.5° Direction: North-West

HR7743 is a double hypergiant star in the constellation of Cygnus.

HR7743 visual magnitude is 5.66. Because of its reltive faintness, HR7743 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 HR7743:

Color of HR7743 ⬤

Magnitude of HR7743 5.66

Class Hypergiant

VISIBILITY RIGHT NOW

HR7743 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 13.9°
Azimuth: 307.5°
Direction: North-West

Celestial coordinates and finder chart of HR7743

HR7743 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 HR7743 are provided in the following table:

Right Ascension J2000 20h 15m 23s

Declination J2000 +33° 43’ 45”

Galactic Longitude 71.99°

Galactic Latitude -0.68°

Constellation Cygnus

The simplified sky map below shows the position of HR7743 in the sky:

Simplified finder chart for HR7743.

Visibility of HR7743 from your location

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

Today's HR7743 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.3° RISE 11:20

Max altitude: 72.2° TRANSIT 21:05

Azimuth: 303.7° SET 6:54

Digitized Sky Survey image of HR7743

The image below is a photograph of HR7743 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 HR7743 is -0.04 arcsec per year in Right Ascension and -0.106 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR7743. The red arrow shows the motion of HR7743 during the next 1000 years (-0.67 arcmin in Right Ascension and -1.77 arcmin in declination);

Distance of HR7743 from the Sun and relative movement

HR7743 is distant 300.18 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 92.08 pc

Distance (light year) 300.18 ly

Heliocentric radial velocity -10 km/s

Proper Motion RA -0.04 arcsec/year

Proper Motion Dec -0.106 arcsec/year

Spectral properties of HR7743

HR7743 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 0.84

Spectral Type K0III

Color Index (B-V) 0.91

Temperature of HR7743 4970K

The red dot in the diagram below shows where HR7743 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7743. Attribution: Richard Powell / CC BY-SA

HR7743 star system properties

HR7743 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR7743 double sysyem:

Main star magnitude 5.66

Secondary star magnitude 11.96

Magnitude difference 6.3

Separation 3 arcsec

Alternative designations of HR7743

Henry Draper Catalogue HD192787

SAO Catalogue SAO69701

Hipparcos Catalogue HIP99841

Durchmusterung Catalogue BD+33 3827

Aitken Double Star Catalogue ADS13596

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