HR654

HR654 is a variable and double supergiant star in the constellation of Perseus.

HR654 visual magnitude is 6.48. Because of its reltive faintness, HR654 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 HR654:

Color of HR654 ⬤

Magnitude of HR654 6.48

Class Supergiant

VISIBILITY RIGHT NOW HR654 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 24°.

Celestial coordinates and finder chart of HR654

HR654 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 HR654 are provided in the following table:

Right Ascension J2000 02h 16m 51s

Declination J2000 +57° 03’ 19”

Galactic Longitude 134.38°

Galactic Latitude -3.91°

Constellation Perseus

The simplified sky map below shows the position of HR654 in the sky:

Simplified finder chart for HR654.

Visibility of HR654 from your location

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

HR654 is circumpolar and transits at 09:30 UTC (altitude: 84.4°)

Digitized Sky Survey image of HR654

The image below is a photograph of HR654 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 HR654 is 0.001 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR654. The red arrow shows the motion of HR654 during the next 100000 years (1.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of HR654 from the Sun and relative movement

HR654 is distant 2,379.56 light years from the Sun and it is moving towards the Sun at the speed of 42 kilometers per second.

Distance (parsec) 729.93 pc

Distance (light year) 2,379.56 ly

Heliocentric radial velocity -42 km/s

Proper Motion RA 0.001 arcsec/year

Proper Motion Dec -0.002 arcsec/year

Spectral properties of HR654

HR654 belongs to spectral class B1 and has a luminosity class of I corresponding to a supergiant star.

Absolute magnitude -2.84

Spectral Type B1I

Color Index (B-V) 0.28

Temperature of HR654 7591K

The red dot in the diagram below shows where HR654 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR654. Attribution: Richard Powell / CC BY-SA

HR654 star system properties

HR654 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR654 double sysyem:

Main star magnitude 6.48

Secondary star magnitude 7.38

Magnitude difference 0.9

Separation 103 arcsec

Alternative designations of HR654

Henry Draper Catalogue HD13854

SAO Catalogue SAO23115

Hipparcos Catalogue HIP10633

Durchmusterung Catalogue BD+56 471

General Catalogue of Variable Stars Var?

In Evidence

Other stars in Perseus