Alruba - HR6618

Altitude: 67.3° Azimuth: 69.2° Direction: East-North-East

Alruba, also designated as , is a main-sequence star in the constellation of Draco.

Alruba visual magnitude is 5.75. Because of its reltive faintness, Alruba 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 Alruba:

Color of Alruba ⬤

Magnitude of Alruba 5.75

Class Main-sequence

VISIBILITY RIGHT NOW

Alruba - HR6618 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 67.3°
Azimuth: 69.2°
Direction: East-North-East

Celestial coordinates and finder chart of Alruba

Alruba 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 Alruba are provided in the following table:

Right Ascension J2000 17h 43m 59s

Declination J2000 +53° 48’ 06”

Galactic Longitude 81.49°

Galactic Latitude 31.36°

Constellation Draco

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

Simplified finder chart for Alruba - HR6618.

Visibility of Alruba from your location

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

Alruba - HR6618 is circumpolar and transits at 16:51 UTC (altitude: 87.7°)

Digitized Sky Survey image of Alruba

The image below is a photograph of Alruba 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 Alruba is 0.022 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of Alruba. The red arrow shows the motion of Alruba during the next 10000 years (3.67 arcmin in Right Ascension and -2.50 arcmin in declination);

Distance of Alruba from the Sun and relative movement

Alruba is distant 412.66 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

Distance (parsec) 126.58 pc

Distance (light year) 412.66 ly

Heliocentric radial velocity -2 km/s

Proper Motion RA 0.022 arcsec/year

Proper Motion Dec -0.015 arcsec/year

Spectral properties of Alruba

Alruba belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 0.24

Spectral Type A2V

Color Index (B-V) 0.01

Temperature of Alruba 10002K

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

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

Alternative designations of Alruba

Proper Name Alruba

Henry Draper Catalogue HD161693

SAO Catalogue SAO30538

Hipparcos Catalogue HIP86782

Durchmusterung Catalogue BD+53 1978

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In Evidence

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