ξ1 Sagittarii (xi1 Sagittarii)

ξ1 Sagittarii is a hypergiant star in the constellation of Sagittarius.

ξ1 Sagittarii visual magnitude is 5.08. Because of its reltive faintness, ξ1 Sagittarii should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about ξ1 Sagittarii:

Color of ξ1 Sagittarii ⬤

Magnitude of ξ1 Sagittarii 5.08

Class Hypergiant

VISIBILITY RIGHT NOW ξ1 Sagittarii (xi1 Sagittarii) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 13°.

Celestial coordinates and finder chart of ξ1 Sagittarii

ξ1 Sagittarii is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ξ1 Sagittarii are provided in the following table:

Right Ascension J2000 18h 57m 20s

Declination J2000 -20° 39’ 23”

Galactic Longitude 14.99°

Galactic Latitude -10.5°

Constellation Sagittarius

The simplified sky map below shows the position of ξ1 Sagittarii in the sky:

Finder chart ξ1 Sagittarii (xi1 Sagittarii) star

Simplified finder chart for ξ1 Sagittarii (xi1 Sagittarii).

Visibility of ξ1 Sagittarii from your location

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

Today's ξ1 Sagittarii (xi1 Sagittarii) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 110.7° RISE 3:14

Max altitude: 17.9° TRANSIT 7:19

Azimuth: 249.3° SET 11:25

RIGHT NOW ξ1 Sagittarii (xi1 Sagittarii) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ξ1 Sagittarii

The image below is a photograph of ξ1 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 ξ1 Sagittarii is -0.001 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of ξ1 Sagittarii (xi1 Sagittarii) star

DSS2 image of ξ1 Sagittarii. The red arrow shows the motion of ξ1 Sagittarii during the next 100000 years (-1.67 arcmin in Right Ascension and -11.67 arcmin in declination);

Distance of ξ1 Sagittarii from the Sun and relative movement

ξ1 Sagittarii is distant 5,015.38 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

Distance (parsec) 1,538.46 pc

Distance (light year) 5,015.38 ly

Heliocentric radial velocity 2 km/s

Proper Motion RA -0.001 arcsec/year

Proper Motion Dec -0.007 arcsec/year

Spectral properties of ξ1 Sagittarii

ξ1 Sagittarii belongs to spectral class A0 and has a luminosity class of II corresponding to a hypergiant star.

Absolute magnitude -5.86

Spectral Type A0II

Color Index (B-V) 0.13

Temperature of ξ1 Sagittarii 8748K

The red dot in the diagram below shows where ξ1 Sagittarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ξ1 Sagittarii. Attribution: Richard Powell / CC BY-SA

Alternative designations of ξ1 Sagittarii

Bayer designation ξ1 Sagittarii
(xi1 Sagittarii)

Flamsteed designation 36 Sagittarii

Henry Draper Catalogue HD175687

SAO Catalogue SAO187498

Hipparcos Catalogue HIP93057

Durchmusterung Catalogue BD-20 5339

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Other stars in Sagittarius