Giausar - λ Draconis (lambda Draconis)

Giausar, also designated as λ Draconis (lambda Draconis), is a variable hypergiant star in the constellation of Draco.

Giausar visual magnitude is 3.84. Because of its moderate brightness, Giausar should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about Giausar:

Color of Giausar ⬤

Magnitude of Giausar 3.84

Class Hypergiant

VISIBILITY RIGHT NOW Giausar - λ Draconis (lambda Draconis) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 60°.

Celestial coordinates and finder chart of Giausar

Giausar is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Giausar are provided in the following table:

Right Ascension J2000 11h 31m 24s

Declination J2000 +69° 19’ 51”

Galactic Longitude 132.98°

Galactic Latitude 46.2°

Constellation Draco

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

Finder chart Giausar - λ Draconis (lambda Draconis) star

Simplified finder chart for Giausar - λ Draconis (lambda Draconis).

Visibility of Giausar from your location

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

Giausar - λ Draconis (lambda Draconis) is circumpolar and transits at 23:38 UTC (altitude: 72.1°)

Digitized Sky Survey image of Giausar

The image below is a photograph of Giausar 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 Giausar is -0.039 arcsec per year in Right Ascension and -0.017 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Giausar - λ Draconis (lambda Draconis) star

DSS2 image of Giausar. The red arrow shows the motion of Giausar during the next 10000 years (-6.50 arcmin in Right Ascension and -2.83 arcmin in declination);

Distance of Giausar from the Sun and relative movement

Giausar is distant 334.02 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

Distance (parsec) 102.46 pc

Distance (light year) 334.02 ly

Heliocentric radial velocity 7 km/s

Proper Motion RA -0.039 arcsec/year

Proper Motion Dec -0.017 arcsec/year

Spectral properties of Giausar

Giausar belongs to spectral class M0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude -1.21

Spectral Type M0III

Color Index (B-V) 1.62

Temperature of Giausar 3622K

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

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

Alternative designations of Giausar

Proper Name Giausar

Bayer designation λ Draconis
(lambda Draconis)

Flamsteed designation 1 Draconis

Henry Draper Catalogue HD100029

SAO Catalogue SAO15532

Hipparcos Catalogue HIP56211

Durchmusterung Catalogue BD+70 665

FK5 Catalogue 433

General Catalogue of Variable Stars 5231

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Other stars in Draco