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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:44  
clear_day Transit: 12:10  
SunsetSet: 17:38
sleep NighttimeWhat's Visible Now?
All Constellations » Sagittarius » 

Alnasl - γ2 Sagittarii (gamma2 Sagittarii)

Altitude: -52.4°   Azimuth: 72.6°   Direction: East-North-East

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 skies, and should be also quite easily visible from light polluted areas.

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.

Image of Alnasl - γ2 Sagittarii (gamma2 Sagittarii) star
DSS2 image of Alnasl. The red arrow shows the motion of Alnasl during the next 1000 years (-0.88 arcmin in Right Ascension and -3.08 arcmin in declination);

Key facts about Alnasl


Alnasl - γ2 Sagittarii (gamma2 Sagittarii) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -52.4°
Azimuth: 72.6°
Direction: East-North-East

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 hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Alnasl are provided in the following table:

18h 05m 48s
-30° 25’ 27”

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

Finder chart Alnasl - γ2 Sagittarii (gamma2 Sagittarii) star
Simplified finder chart for Alnasl - γ2 Sagittarii (gamma2 Sagittarii).

Visibility of Alnasl from your location

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

Today's Alnasl - γ2 Sagittarii (gamma2 Sagittarii) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 120.4°
Max altitude: 8.1°
Azimuth: 239.6°

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.

29.46 pc
96.05 ly
22 km/s
-0.053 arcsec/year
-0.185 arcsec/year

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.

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

Alternative designations of Alnasl

γ2 Sagittarii
(gamma2 Sagittarii)
10 Sagittarii