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public  La Longueville, France La Longueville, France  ⓘ
TimezoneEurope/Paris
Sunrise: 5:37 
Transit: 13:43 
Sunset: 21:49
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All Constellations » Sagittarius » 

Nunki - σ Sagittarii (sigma Sagittarii)

Above the horizon.  Rise: 0:09 | Tran: 3:46 | Set: 7:19
Alt: 6.65°   Az: 146.89°   Direction: South-South-East

Nunki, also designated as σ Sagittarii (sigma Sagittarii), is a double main-sequence star of spectral class B2 in the constellation of Sagittarius.

Nunki visual magnitude is 2.02, making it the 49th brightest star in the sky. Because of its brightness, Nunki is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of Nunki - σ Sagittarii (sigma Sagittarii) star
DSS2 image of Nunki. The red arrow shows the motion of Nunki during the next 10000 years (2.17 arcmin in Right Ascension and -9.00 arcmin in declination);

Celestial Coordinates

Apparent

18h 56m 50s
-26° 15’ 44”
21h 31m 04s
16h 27m 54s

J2000

18h 55m 15s
-26° 17’ 48”

Galactic Coordinates

9.56°
-12.43°

Finder Chart

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Finder chart for Nunki - σ Sagittarii (sigma Sagittarii).

Magnitude, Color, Spectral Class

2.02
Main-sequence

-2.17
B2V
14087K

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

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

Star System Properties

Nunki is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Nunki double sysyem:

2.02
9.42
7.4
309 arcsec

Distance, Radial Speed, Proper Motion

Nunki is distant 224.21 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

68.78
224.21
-11 km/s
0.013 arcsec/y
-0.054"/y

Alternative Designations

Nunki
σ Sagittarii
(sigma Sagittarii)
34 Sagittarii
SAO187448
SAO187448

Visibility from Your Location

Today's Nunki - σ Sagittarii (sigma Sagittarii) rise, transit and set times from La Longueville, France are the following (all times relative to the local timezone Europe/Paris):

Azimuth: 116.3°
Max altitude: 13.4°
Azimuth: 243.7°