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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:04  
clear_day Transit: 12:06  
SunsetSet: 18:09
sunny DaytimeWhat's Visible Now?
All Constellations » Sagittarius » 

γ1 Sagittarii (gamma1 Sagittarii)

Altitude: 2.2°   Azimuth: 212.7°   Direction: South-South-West

γ1 Sagittarii is a variable and multiple supergiant star in the constellation of Sagittarius.

γ1 Sagittarii visual magnitude is 4.69. Because of its moderate brightness, γ1 Sagittarii should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of γ1 Sagittarii is 0.013 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of γ1 Sagittarii (gamma1 Sagittarii) star
DSS2 image of γ1 Sagittarii. The red arrow shows the motion of γ1 Sagittarii during the next 10000 years (2.17 arcmin in Right Ascension and 0.00 arcmin in declination);

Key facts about γ1 Sagittarii

4.69
Supergiant

γ1 Sagittarii (gamma1 Sagittarii) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 2.2°
Azimuth: 212.7°
Direction: South-South-West

Celestial coordinates and finder chart of γ1 Sagittarii

γ1 Sagittarii 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 γ1 Sagittarii are provided in the following table:

18h 05m 01s
-29° 34’ 47”
1.58°
-3.98°
Sagittarius

The simplified sky map below shows the position of γ1 Sagittarii in the sky:

Finder chart γ1 Sagittarii (gamma1 Sagittarii) star
Simplified finder chart for γ1 Sagittarii (gamma1 Sagittarii).

Visibility of γ1 Sagittarii 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 γ1 Sagittarii (gamma1 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: 119.6°
Max altitude: 8.9°
Azimuth: 240.4°

Distance of γ1 Sagittarii from the Sun and relative movement

γ1 Sagittarii is distant 2,076.43 light years from the Sun and it is moving towards the Sun at the speed of 28 kilometers per second.

636.94 pc
2,076.43 ly
-28 km/s
0.013 arcsec/year

Spectral properties of γ1 Sagittarii

γ1 Sagittarii belongs to spectral class F4 and has a luminosity class of I corresponding to a supergiant star.

-4.33
F4I
5342K

The red dot in the diagram below shows where γ1 Sagittarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of γ1 Sagittarii. Attribution: Richard Powell / CC BY-SA

Alternative designations of γ1 Sagittarii

γ1 Sagittarii
(gamma1 Sagittarii)
SAO186237
SAO186237