Alnasl - γ2 Sagittarii (gamma2 Sagittarii)
Alnasl, also designated as γ2 Sagittarii (gamma2 Sagittarii), is a variable hypergiant star in the constellation of Sagittarius.
Alnasl visual magnitude is 2.99. Thanks to its high brightness, Alnasl 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 Alnasl:
Celestial coordinates and finder chart of Alnasl
Alnasl is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Alnasl are provided in the following table:
The simplified sky map below shows the position of Alnasl in the sky:
Visibility of Alnasl from your location
Digitized Sky Survey image of Alnasl
The image below is a photograph of Alnasl 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 Alnasl is -0.053 arcsec per year in Right Ascension and -0.185 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of Alnasl from the Sun and relative movement
Alnasl is distant 96.05 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.
Spectral properties of Alnasl
Alnasl belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.
The red dot in the diagram below shows where Alnasl is situated in the Hertzsprung–Russell diagram.