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

Alsafi - σ Draconis (sigma Draconis)

Alsafi, also designated as σ Draconis (sigma Draconis), is a variable hypergiant star in the constellation of Draco.

Alsafi visual magnitude is 4.68. Because of its moderate brightness, Alsafi 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 Alsafi:

4.68
Hypergiant
Alsafi - σ Draconis (sigma Draconis) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 33°.

Celestial coordinates and finder chart of Alsafi

Alsafi 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 Alsafi are provided in the following table:

19h 32m 21s
+69° 39’ 39”
101.32°
21.89°
Draco

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

Finder chart Alsafi - σ Draconis (sigma Draconis) star
Simplified finder chart for Alsafi - σ Draconis (sigma Draconis).

Visibility of Alsafi from your location

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

Alsafi - σ Draconis (sigma Draconis) is circumpolar and transits at 10:23 UTC (altitude: 71.8°)

Digitized Sky Survey image of Alsafi

The image below is a photograph of Alsafi 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 Alsafi is 0.6 arcsec per year in Right Ascension and -1.738 arcsec per year in Declination and the associated displacement for the next 100 years is represented with the red arrow.

Image of Alsafi - σ Draconis (sigma Draconis) star
DSS2 image of Alsafi. The red arrow shows the motion of Alsafi during the next 100 years (1.00 arcmin in Right Ascension and -2.90 arcmin in declination);

Distance of Alsafi from the Sun and relative movement

Alsafi is distant 18.80 light years from the Sun and it is moving far from the Sun at the speed of 27 kilometers per second.

5.77 pc
18.80 ly
27 km/s
0.6 arcsec/year
-1.738 arcsec/year

Spectral properties of Alsafi

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

5.88
K0V
5311K

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

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

Alternative designations of Alsafi

Alsafi
σ Draconis
(sigma Draconis)
61 Draconis
SAO18396
SAO18396