Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

Rastaban - β Draconis (beta Draconis)

Rastaban, also designated as β Draconis (beta Draconis), is a multiple supergiant star in the constellation of Draco.

Rastaban visual magnitude is 2.79. Thanks to its high brightness, Rastaban is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about Rastaban:

2.79
Supergiant
Rastaban - β Draconis (beta Draconis) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 39°.

Celestial coordinates and finder chart of Rastaban

Rastaban 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 Rastaban are provided in the following table:

17h 30m 25s
+52° 18’ 05”
79.58°
33.31°
Draco

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

Finder chart Rastaban - β Draconis (beta Draconis) star
Simplified finder chart for Rastaban - β Draconis (beta Draconis).

Visibility of Rastaban from your location

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

Rastaban - β Draconis (beta Draconis) is circumpolar and transits at 22:25 UTC (altitude: 89.2°)

Digitized Sky Survey image of Rastaban

The image below is a photograph of Rastaban 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 Rastaban is -0.016 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.

Image of Rastaban - β Draconis (beta Draconis) star
DSS2 image of Rastaban. The red arrow shows the motion of Rastaban during the next 10000 years (-2.67 arcmin in Right Ascension and 2.50 arcmin in declination);

Distance of Rastaban from the Sun and relative movement

Rastaban is distant 361.42 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

110.86 pc
361.42 ly
-20 km/s
-0.016 arcsec/year
0.015 arcsec/year

Spectral properties of Rastaban

Rastaban belongs to spectral class G2 and has a luminosity class of I corresponding to a supergiant star.

-2.43
G2I
4791K

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

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

Rastaban star system properties

Rastaban is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Rastaban double sysyem:

2.79
11.69
8.9
4.2 arcsec

Alternative designations of Rastaban

Rastaban
β Draconis
(beta Draconis)
23 Draconis
SAO30429
SAO30429