HR8

HR8 is a variable and multiple hypergiant star in the constellation of Andromeda.

HR8 visual magnitude is 6.13. Because of its reltive faintness, HR8 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 HR8:

Color of HR8 ⬤

Magnitude of HR8 6.13

Class Hypergiant

VISIBILITY RIGHT NOW HR8 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 14°.

Celestial coordinates and finder chart of HR8

HR8 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 HR8 are provided in the following table:

Right Ascension J2000 00h 06m 36s

Declination J2000 +29° 01’ 17”

Galactic Longitude 111.26°

Galactic Latitude -32.83°

Constellation Andromeda

The simplified sky map below shows the position of HR8 in the sky:

Simplified finder chart for HR8.

Visibility of HR8 from your location

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

Today's HR8 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 61.0° RISE 3:38

Max altitude: 67.5° TRANSIT 12:32

Azimuth: 299.0° SET 21:26

RIGHT NOW HR8 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR8

The image below is a photograph of HR8 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 HR8 is 0.38 arcsec per year in Right Ascension and -0.182 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR8. The red arrow shows the motion of HR8 during the next 1000 years (6.33 arcmin in Right Ascension and -3.03 arcmin in declination);

Distance of HR8 from the Sun and relative movement

HR8 is distant 44.67 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

Distance (parsec) 13.70 pc

Distance (light year) 44.67 ly

Heliocentric radial velocity -8 km/s

Proper Motion RA 0.38 arcsec/year

Proper Motion Dec -0.182 arcsec/year

Spectral properties of HR8

HR8 belongs to spectral class K0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 5.45

Spectral Type K0V

Color Index (B-V) 0.75

Temperature of HR8 5436K

The red dot in the diagram below shows where HR8 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8. Attribution: Richard Powell / CC BY-SA

HR8 star system properties

HR8 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR8 double sysyem:

Main star magnitude 6.13

Secondary star magnitude 8.73

Magnitude difference 2.6

Separation 158.6 arcsec

Alternative designations of HR8

Henry Draper Catalogue HD166

SAO Catalogue SAO73743

Hipparcos Catalogue HIP544

Durchmusterung Catalogue BD+28 4704

Gliese Catalogue Gl 5

General Catalogue of Variable Stars 33

Aitken Double Star Catalogue ADS69

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HR8