HR7655

HR7655 is a hypergiant star in the constellation of Cygnus.

HR7655 visual magnitude is 6.2. Because of its reltive faintness, HR7655 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 HR7655:

Color of HR7655 ⬤

Magnitude of HR7655 6.2

Class Hypergiant

VISIBILITY RIGHT NOW HR7655 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 5°.

Celestial coordinates and finder chart of HR7655

HR7655 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 HR7655 are provided in the following table:

Right Ascension J2000 20h 01m 15s

Declination J2000 +37° 05’ 56”

Galactic Longitude 73.26°

Galactic Latitude 3.56°

Constellation Cygnus

The simplified sky map below shows the position of HR7655 in the sky:

Simplified finder chart for HR7655.

Visibility of HR7655 from your location

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

Today's HR7655 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 52.9° RISE 21:39

Max altitude: 75.6° TRANSIT 8:27

Azimuth: 307.1° SET 19:11

RIGHT NOW HR7655 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7655

The image below is a photograph of HR7655 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 HR7655 is 0.044 arcsec per year in Right Ascension and 0.051 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7655. The red arrow shows the motion of HR7655 during the next 10000 years (7.33 arcmin in Right Ascension and 8.50 arcmin in declination);

Distance of HR7655 from the Sun and relative movement

HR7655 is distant 1,003.08 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

Distance (parsec) 307.69 pc

Distance (light year) 1,003.08 ly

Heliocentric radial velocity -16 km/s

Proper Motion RA 0.044 arcsec/year

Proper Motion Dec 0.051 arcsec/year

Spectral properties of HR7655

HR7655 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude -1.24

Spectral Type K0III

Color Index (B-V) 1.31

Temperature of HR7655 4104K

The red dot in the diagram below shows where HR7655 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7655. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7655

Henry Draper Catalogue HD189942

SAO Catalogue SAO69267

Hipparcos Catalogue HIP98563

Durchmusterung Catalogue BD+36 3820

How to support us

In Evidence

Other stars in Cygnus