HR8164

HR8164 is a multiple supergiant star in the constellation of Cepheus.

HR8164 visual magnitude is 5.66. Because of its reltive faintness, HR8164 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 HR8164:

Color of HR8164 ⬤

Magnitude of HR8164 5.66

Class Supergiant

VISIBILITY RIGHT NOW HR8164 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 28°.

Celestial coordinates and finder chart of HR8164

HR8164 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 HR8164 are provided in the following table:

Right Ascension J2000 21h 19m 15s

Declination J2000 +58° 37’ 24”

Galactic Longitude 98.18°

Galactic Latitude 6.36°

Constellation Cepheus

The simplified sky map below shows the position of HR8164 in the sky:

Simplified finder chart for HR8164.

Visibility of HR8164 from your location

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

HR8164 is circumpolar and transits at 04:41 UTC (altitude: 82.9°)

Digitized Sky Survey image of HR8164

The image below is a photograph of HR8164 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 HR8164 is 0.005 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR8164. The red arrow shows the motion of HR8164 during the next 100000 years (8.33 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of HR8164 from the Sun and relative movement

HR8164 is distant 3,662.92 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

Distance (parsec) 1,123.60 pc

Distance (light year) 3,662.92 ly

Heliocentric radial velocity -21 km/s

Proper Motion RA 0.005 arcsec/year

Proper Motion Dec -0.001 arcsec/year

Spectral properties of HR8164

HR8164 belongs to spectral class M1 and has a luminosity class of I corresponding to a supergiant star.

Absolute magnitude -4.59

Spectral Type M1I

Color Index (B-V) 1.38

Temperature of HR8164 3983K

The red dot in the diagram below shows where HR8164 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8164. Attribution: Richard Powell / CC BY-SA

HR8164 star system properties

HR8164 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 HR8164 double sysyem:

Main star magnitude 5.66

Secondary star magnitude 9.46

Magnitude difference 3.8

Separation 4.6 arcsec

Alternative designations of HR8164

Henry Draper Catalogue HD203338

SAO Catalogue SAO33318

Hipparcos Catalogue HIP105259

Durchmusterung Catalogue BD+58 2249

Aitken Double Star Catalogue ADS14864

In Evidence

Other stars in Cepheus