HR7887

Altitude: 13.3° Azimuth: 304.4° Direction: North-West

HR7887 is a multiple hypergiant star in the constellation of Cygnus.

HR7887 visual magnitude is 6.49. Because of its reltive faintness, HR7887 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 HR7887:

Color of HR7887 ⬤

Magnitude of HR7887 6.49

Class Hypergiant

VISIBILITY RIGHT NOW

HR7887 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 13.3°
Azimuth: 304.4°
Direction: North-West

Celestial coordinates and finder chart of HR7887

HR7887 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 HR7887 are provided in the following table:

Right Ascension J2000 20h 37m 32s

Declination J2000 +31° 31’ 18”

Galactic Longitude 72.89°

Galactic Latitude -5.76°

Constellation Cygnus

The simplified sky map below shows the position of HR7887 in the sky:

Simplified finder chart for HR7887.

Visibility of HR7887 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 HR7887 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: 58.5° RISE 6:02

Max altitude: 70.0° TRANSIT 15:21

Azimuth: 301.5° SET 0:43

Digitized Sky Survey image of HR7887

The image below is a photograph of HR7887 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 HR7887 is -0.045 arcsec per year in Right Ascension and -0.033 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7887. The red arrow shows the motion of HR7887 during the next 10000 years (-7.50 arcmin in Right Ascension and -5.50 arcmin in declination);

Distance of HR7887 from the Sun and relative movement

HR7887 is distant 160.59 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

Distance (parsec) 49.26 pc

Distance (light year) 160.59 ly

Heliocentric radial velocity 1 km/s

Proper Motion RA -0.045 arcsec/year

Proper Motion Dec -0.033 arcsec/year

Spectral properties of HR7887

HR7887 belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 3.03

Spectral Type F0V

Color Index (B-V) 0.34

Temperature of HR7887 7217K

The red dot in the diagram below shows where HR7887 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7887. Attribution: Richard Powell / CC BY-SA

HR7887 star system properties

HR7887 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR7887 double sysyem:

Main star magnitude 6.49

Secondary star magnitude 6.59

Magnitude difference 0.1

Separation 180.8 arcsec

Alternative designations of HR7887

Henry Draper Catalogue HD196629

SAO Catalogue SAO70289

Hipparcos Catalogue HIP101768

Durchmusterung Catalogue BD+31 4160

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