Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

Kaus Borealis - λ Sagittarii (lambda Sagittarii)

Kaus Borealis, also designated as λ Sagittarii (lambda Sagittarii), is a giant star in the constellation of Sagittarius.

Kaus Borealis visual magnitude is 2.81. Thanks to its high brightness, Kaus Borealis 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 Kaus Borealis:

2.81
Giant
Kaus Borealis - λ Sagittarii (lambda Sagittarii) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of Kaus Borealis

Kaus Borealis 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 Kaus Borealis are provided in the following table:

18h 27m 58s
-25° 25’ 18”
7.66°
-6.52°
Sagittarius

The simplified sky map below shows the position of Kaus Borealis in the sky:

Finder chart Kaus Borealis - λ Sagittarii (lambda Sagittarii) star
Simplified finder chart for Kaus Borealis - λ Sagittarii (lambda Sagittarii).

Visibility of Kaus Borealis from your location

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

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

Azimuth: 115.4°
Max altitude: 13.1°
Azimuth: 244.6°
Kaus Borealis - λ Sagittarii (lambda Sagittarii) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Kaus Borealis

The image below is a photograph of Kaus Borealis 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 Kaus Borealis is -0.044 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 Kaus Borealis - λ Sagittarii (lambda Sagittarii) star
DSS2 image of Kaus Borealis. The red arrow shows the motion of Kaus Borealis during the next 1000 years (-0.73 arcmin in Right Ascension and -3.08 arcmin in declination);

Distance of Kaus Borealis from the Sun and relative movement

Kaus Borealis is distant 77.25 light years from the Sun and it is moving towards the Sun at the speed of 43 kilometers per second.

23.70 pc
77.25 ly
-43 km/s
-0.044 arcsec/year
-0.185 arcsec/year

Spectral properties of Kaus Borealis

Kaus Borealis belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.

0.94
K1III
4649K

The red dot in the diagram below shows where Kaus Borealis is situated in the Hertzsprung–Russell diagram.

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

Alternative designations of Kaus Borealis

Kaus Borealis
λ Sagittarii
(lambda Sagittarii)
22 Sagittarii
SAO186841
SAO186841
Gl 713.1