γ1 Sagittarii (gamma1 Sagittarii)

Altitude: -0.9° Azimuth: 140.6° Direction: South-East

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 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 γ1 Sagittarii:

Color of γ1 Sagittarii ⬤

Magnitude of γ1 Sagittarii 4.69

Class Supergiant

VISIBILITY RIGHT NOW

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

Altitude: -0.9°
Azimuth: 140.6°
Direction: South-East

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:

Right Ascension J2000 18h 05m 01s

Declination J2000 -29° 34’ 47”

Galactic Longitude 1.58°

Galactic Latitude -3.98°

Constellation 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° RISE 15:15

Max altitude: 8.9° TRANSIT 18:12

Azimuth: 240.4° SET 21:09

Digitized Sky Survey image of γ1 Sagittarii

The image below is a photograph of γ1 Sagittarii 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 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);

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.

Distance (parsec) 636.94 pc

Distance (light year) 2,076.43 ly

Heliocentric radial velocity -28 km/s

Proper Motion RA 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.

Absolute magnitude -4.33

Spectral Type F4I

Color Index (B-V) 0.78

Temperature of γ1 Sagittarii 5342K

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

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

Alternative designations of γ1 Sagittarii

Bayer designation γ1 Sagittarii
(gamma1 Sagittarii)

Henry Draper Catalogue HD164975

SAO Catalogue SAO186237

Hipparcos Catalogue HIP88567

Durchmusterung Catalogue CD-2914447

General Catalogue of Variable Stars W Sgr

Aitken Double Star Catalogue ADS11029

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